asyncapi: 3.0.0
info:
  title: SLNG Gateway API - SLNG STT
  version: 0.1.0
  description: SLNG Gateway API
  contact:
    name: SLNG Support
    url: https://slng.ai
    email: support@slng.ai
  license:
    name: Proprietary
  tags:
    - name: STT
      description: Speech-to-Text services
    - name: Unmute STT Bridge
      description: SLNG native WebSocket STT protocol bridge.
    - name: Unmute TTS Bridge
      description: SLNG native WebSocket TTS protocol bridge.
servers:
  production:
    host: api.slng.ai
    protocol: wss
    description: Production
    security:
      - $ref: "#/components/securitySchemes/bearer"
  staging:
    host: stageapi.slng.ai
    protocol: wss
    description: Staging
    security:
      - $ref: "#/components/securitySchemes/bearer"
channels:
  /v1/stt/slng/openai/whisper:large-v3:
    address: /v1/stt/slng/openai/whisper:large-v3
    title: Whisper Large v3
    summary: Whisper Large v3
    description: Stream real-time transcripts from OpenAI Whisper Large v3 over WebSocket with VAD, partial results, and automatic language detection across 99 languages.
    tags:
      - name: Whisper Large v3
    servers:
      - $ref: "#/servers/production"
      - $ref: "#/servers/staging"
    messages:
      SlngWhisperLargeV3SttInitRequest:
        $ref: "#/components/messages/SlngWhisperLargeV3SttInitRequest"
      SttAudioMessage:
        $ref: "#/components/messages/SttAudioMessage"
      SttFinalizeMessage:
        $ref: "#/components/messages/SttFinalizeMessage"
      SttCloseMessage:
        $ref: "#/components/messages/SttCloseMessage"
      SlngWhisperSttReadyResponse:
        $ref: "#/components/messages/SlngWhisperSttReadyResponse"
      SlngWhisperSttPartialTranscript:
        $ref: "#/components/messages/SlngWhisperSttPartialTranscript"
      SlngWhisperSttFinalTranscript:
        $ref: "#/components/messages/SlngWhisperSttFinalTranscript"
      SttErrorResponse:
        $ref: "#/components/messages/SttErrorResponse"
    bindings:
      ws:
        method: GET
        headers:
          $ref: "#/components/schemas/WebsocketHeadersSlngWhisper"
  /v1/stt/slng/deepgram/nova:3-en:
    address: /v1/stt/slng/deepgram/nova:3-en
    title: Nova 3 (English)
    summary: Nova 3 (English)
    description: Stream real-time English transcripts from SLNG-hosted Deepgram Nova 3 over WebSocket with low-latency partials, finals, and speaker diarization.
    tags:
      - name: Deepgram Nova 3
    servers:
      - $ref: "#/servers/production"
    messages:
      SlngDeepgramNova3EnSttInitRequest:
        $ref: "#/components/messages/SlngDeepgramNova3EnSttInitRequest"
      DeepgramSttBinaryAudio:
        $ref: "#/components/messages/DeepgramSttBinaryAudio"
      SttFinalizeMessage:
        $ref: "#/components/messages/SttFinalizeMessage"
      SttCloseMessage:
        $ref: "#/components/messages/SttCloseMessage"
      KeepaliveMessage:
        $ref: "#/components/messages/KeepaliveMessage"
      DeepgramSttMetadata:
        $ref: "#/components/messages/DeepgramSttMetadata"
      DeepgramSttResultsEn:
        $ref: "#/components/messages/DeepgramSttResultsEn"
      DeepgramSttError:
        $ref: "#/components/messages/DeepgramSttError"
    bindings:
      ws:
        method: GET
        headers:
          $ref: "#/components/schemas/WebsocketHeadersSlngNovaEn"
  /v1/stt/slng/deepgram/nova:3-te:
    address: /v1/stt/slng/deepgram/nova:3-te
    title: Nova 3 (Telugu)
    summary: Nova 3 (Telugu)
    description: Stream real-time Telugu speech-to-text from SLNG-hosted Deepgram Nova 3 over WebSocket with low-latency partial and final transcripts and VAD.
    tags:
      - name: Deepgram Nova 3
    servers:
      - $ref: "#/servers/production"
    messages:
      SlngDeepgramNova3TeSttInitRequest:
        $ref: "#/components/messages/SlngDeepgramNova3TeSttInitRequest"
      DeepgramSttBinaryAudio:
        $ref: "#/components/messages/DeepgramSttBinaryAudio"
      SttFinalizeMessage:
        $ref: "#/components/messages/SttFinalizeMessage"
      SttCloseMessage:
        $ref: "#/components/messages/SttCloseMessage"
      KeepaliveMessage:
        $ref: "#/components/messages/KeepaliveMessage"
      DeepgramSttMetadata:
        $ref: "#/components/messages/DeepgramSttMetadata"
      DeepgramSttResultsTe:
        $ref: "#/components/messages/DeepgramSttResultsTe"
      DeepgramSttError:
        $ref: "#/components/messages/DeepgramSttError"
    bindings:
      ws:
        method: GET
        headers:
          $ref: "#/components/schemas/WebsocketHeadersSlngNovaTe"
  /v1/stt/slng/deepgram/nova:3-mr:
    address: /v1/stt/slng/deepgram/nova:3-mr
    title: Nova 3 (Marathi)
    summary: Nova 3 (Marathi)
    description: Stream real-time Marathi speech-to-text from SLNG-hosted Deepgram Nova 3 over WebSocket with low-latency partial and final transcripts and VAD.
    tags:
      - name: Deepgram Nova 3
    servers:
      - $ref: "#/servers/production"
    messages:
      SlngDeepgramNova3MrSttInitRequest:
        $ref: "#/components/messages/SlngDeepgramNova3MrSttInitRequest"
      DeepgramSttBinaryAudio:
        $ref: "#/components/messages/DeepgramSttBinaryAudio"
      SttFinalizeMessage:
        $ref: "#/components/messages/SttFinalizeMessage"
      SttCloseMessage:
        $ref: "#/components/messages/SttCloseMessage"
      KeepaliveMessage:
        $ref: "#/components/messages/KeepaliveMessage"
      DeepgramSttMetadata:
        $ref: "#/components/messages/DeepgramSttMetadata"
      DeepgramSttResultsMr:
        $ref: "#/components/messages/DeepgramSttResultsMr"
      DeepgramSttError:
        $ref: "#/components/messages/DeepgramSttError"
    bindings:
      ws:
        method: GET
        headers:
          $ref: "#/components/schemas/WebsocketHeadersSlngNovaMr"
  /v1/stt/slng/deepgram/nova:3-kn:
    address: /v1/stt/slng/deepgram/nova:3-kn
    title: Nova 3 (Kannada)
    summary: Nova 3 (Kannada)
    description: Stream real-time Kannada speech-to-text from SLNG-hosted Deepgram Nova 3 over WebSocket with low-latency partial and final transcripts and VAD.
    tags:
      - name: Deepgram Nova 3
    servers:
      - $ref: "#/servers/production"
    messages:
      SlngDeepgramNova3KnSttInitRequest:
        $ref: "#/components/messages/SlngDeepgramNova3KnSttInitRequest"
      DeepgramSttBinaryAudio:
        $ref: "#/components/messages/DeepgramSttBinaryAudio"
      SttFinalizeMessage:
        $ref: "#/components/messages/SttFinalizeMessage"
      SttCloseMessage:
        $ref: "#/components/messages/SttCloseMessage"
      KeepaliveMessage:
        $ref: "#/components/messages/KeepaliveMessage"
      DeepgramSttMetadata:
        $ref: "#/components/messages/DeepgramSttMetadata"
      DeepgramSttResultsKn:
        $ref: "#/components/messages/DeepgramSttResultsKn"
      DeepgramSttError:
        $ref: "#/components/messages/DeepgramSttError"
    bindings:
      ws:
        method: GET
        headers:
          $ref: "#/components/schemas/WebsocketHeadersSlngNovaKn"
  /v1/stt/slng/deepgram/nova:3-es:
    address: /v1/stt/slng/deepgram/nova:3-es
    title: Nova 3 (Spanish)
    summary: Nova 3 (Spanish)
    description: Stream real-time Spanish speech-to-text from SLNG-hosted Deepgram Nova 3 over WebSocket with low-latency partial and final transcripts and VAD.
    tags:
      - name: Deepgram Nova 3
    servers:
      - $ref: "#/servers/production"
    messages:
      SlngDeepgramNova3EsSttInitRequest:
        $ref: "#/components/messages/SlngDeepgramNova3EsSttInitRequest"
      DeepgramSttBinaryAudio:
        $ref: "#/components/messages/DeepgramSttBinaryAudio"
      SttFinalizeMessage:
        $ref: "#/components/messages/SttFinalizeMessage"
      SttCloseMessage:
        $ref: "#/components/messages/SttCloseMessage"
      KeepaliveMessage:
        $ref: "#/components/messages/KeepaliveMessage"
      DeepgramSttMetadata:
        $ref: "#/components/messages/DeepgramSttMetadata"
      DeepgramSttResultsEs:
        $ref: "#/components/messages/DeepgramSttResultsEs"
      DeepgramSttError:
        $ref: "#/components/messages/DeepgramSttError"
    bindings:
      ws:
        method: GET
        headers:
          $ref: "#/components/schemas/WebsocketHeadersSlngNovaEs"
  /v1/stt/slng/deepgram/nova:3-in:
    address: /v1/stt/slng/deepgram/nova:3-in
    title: Nova 3 (Indonesian)
    summary: Nova 3 (Indonesian)
    description: Stream real-time Indonesian speech-to-text from SLNG-hosted Deepgram Nova 3 over WebSocket with low-latency partial and final transcripts and VAD.
    tags:
      - name: Deepgram Nova 3
    servers:
      - $ref: "#/servers/production"
    messages:
      SlngDeepgramNova3InSttInitRequest:
        $ref: "#/components/messages/SlngDeepgramNova3InSttInitRequest"
      DeepgramSttBinaryAudio:
        $ref: "#/components/messages/DeepgramSttBinaryAudio"
      SttFinalizeMessage:
        $ref: "#/components/messages/SttFinalizeMessage"
      SttCloseMessage:
        $ref: "#/components/messages/SttCloseMessage"
      KeepaliveMessage:
        $ref: "#/components/messages/KeepaliveMessage"
      DeepgramSttMetadata:
        $ref: "#/components/messages/DeepgramSttMetadata"
      DeepgramSttResultsIn:
        $ref: "#/components/messages/DeepgramSttResultsIn"
      DeepgramSttError:
        $ref: "#/components/messages/DeepgramSttError"
    bindings:
      ws:
        method: GET
        headers:
          $ref: "#/components/schemas/WebsocketHeadersSlngNovaIn"
  /v1/stt/slng/deepgram/nova:3-hi:
    address: /v1/stt/slng/deepgram/nova:3-hi
    title: Nova 3 (Hindi)
    summary: Nova 3 (Hindi)
    description: Stream real-time Hindi speech-to-text from SLNG-hosted Deepgram Nova 3 over WebSocket with low-latency partial and final transcripts and VAD.
    tags:
      - name: Deepgram Nova 3
    servers:
      - $ref: "#/servers/production"
    messages:
      SlngDeepgramNova3HiSttInitRequest:
        $ref: "#/components/messages/SlngDeepgramNova3HiSttInitRequest"
      DeepgramSttBinaryAudio:
        $ref: "#/components/messages/DeepgramSttBinaryAudio"
      SttFinalizeMessage:
        $ref: "#/components/messages/SttFinalizeMessage"
      SttCloseMessage:
        $ref: "#/components/messages/SttCloseMessage"
      KeepaliveMessage:
        $ref: "#/components/messages/KeepaliveMessage"
      DeepgramSttMetadata:
        $ref: "#/components/messages/DeepgramSttMetadata"
      DeepgramSttResultsHi:
        $ref: "#/components/messages/DeepgramSttResultsHi"
      DeepgramSttError:
        $ref: "#/components/messages/DeepgramSttError"
    bindings:
      ws:
        method: GET
        headers:
          $ref: "#/components/schemas/WebsocketHeadersSlngNovaHi"
  /v1/stt/slng/deepgram/nova:3-multi:
    address: /v1/stt/slng/deepgram/nova:3-multi
    title: Nova 3 (Multi-Language)
    summary: Nova 3 (Multi-Language)
    description: Stream real-time multilingual transcripts from SLNG-hosted Deepgram Nova 3 over WebSocket with automatic language detection across supported languages.
    tags:
      - name: Deepgram Nova 3
    servers:
      - $ref: "#/servers/production"
    messages:
      SlngDeepgramNova3MultiSttInitRequest:
        $ref: "#/components/messages/SlngDeepgramNova3MultiSttInitRequest"
      DeepgramSttBinaryAudio:
        $ref: "#/components/messages/DeepgramSttBinaryAudio"
      SttFinalizeMessage:
        $ref: "#/components/messages/SttFinalizeMessage"
      SttCloseMessage:
        $ref: "#/components/messages/SttCloseMessage"
      KeepaliveMessage:
        $ref: "#/components/messages/KeepaliveMessage"
      DeepgramSttMetadata:
        $ref: "#/components/messages/DeepgramSttMetadata"
      DeepgramSttResultsMulti:
        $ref: "#/components/messages/DeepgramSttResultsMulti"
      DeepgramSttError:
        $ref: "#/components/messages/DeepgramSttError"
    bindings:
      ws:
        method: GET
        headers:
          $ref: "#/components/schemas/WebsocketHeadersSlngNovaMulti"
operations:
  sttWhisperLargeV3ReceiveInit:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3"
    summary: Initialize session on Whisper Large v3
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3/messages/SlngWhisperLargeV3SttInitRequest"
    description: Initialize session on Whisper Large v3
    tags: []
  sttWhisperLargeV3ReceiveAudio:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3"
    summary: Send audio frame to Whisper Large v3
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3/messages/SttAudioMessage"
    description: Send audio frame to Whisper Large v3
    tags: []
  sttWhisperLargeV3ReceiveFinalize:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3"
    summary: Force-finalize buffered audio on Whisper Large v3
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3/messages/SttFinalizeMessage"
    description: Force-finalize buffered audio on Whisper Large v3
    tags: []
  sttWhisperLargeV3ReceiveClose:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3"
    summary: Close audio stream on Whisper Large v3
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3/messages/SttCloseMessage"
    description: Close audio stream on Whisper Large v3
    tags: []
  sttWhisperLargeV3SendReady:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3"
    summary: Receive ready signal from Whisper Large v3
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3/messages/SlngWhisperSttReadyResponse"
    description: Receive ready signal from Whisper Large v3
    tags: []
  sttWhisperLargeV3SendPartialTranscript:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3"
    summary: Receive partial transcript from Whisper Large v3
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3/messages/SlngWhisperSttPartialTranscript"
    description: Receive partial transcript from Whisper Large v3
    tags: []
  sttWhisperLargeV3SendFinalTranscript:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3"
    summary: Receive final transcript from Whisper Large v3
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3/messages/SlngWhisperSttFinalTranscript"
    description: Receive final transcript from Whisper Large v3
    tags: []
  sttWhisperLargeV3SendError:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3"
    summary: Receive error from Whisper Large v3
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3/messages/SttErrorResponse"
    description: Receive error from Whisper Large v3
    tags: []
  sttSlngDeepgramNova3EnReceiveInit:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en"
    summary: Initialize session on Deepgram Nova 3 (English)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en/messages/SlngDeepgramNova3EnSttInitRequest"
    description: Initialize session on Deepgram Nova 3 (English)
    tags: []
  sttSlngDeepgramNova3TeReceiveInit:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te"
    summary: Initialize session on Deepgram Nova 3 (Telugu)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te/messages/SlngDeepgramNova3TeSttInitRequest"
    description: Initialize session on Deepgram Nova 3 (Telugu)
    tags: []
  sttSlngDeepgramNova3MrReceiveInit:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr"
    summary: Initialize session on Deepgram Nova 3 (Marathi)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr/messages/SlngDeepgramNova3MrSttInitRequest"
    description: Initialize session on Deepgram Nova 3 (Marathi)
    tags: []
  sttSlngDeepgramNova3KnReceiveInit:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn"
    summary: Initialize session on Deepgram Nova 3 (Kannada)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn/messages/SlngDeepgramNova3KnSttInitRequest"
    description: Initialize session on Deepgram Nova 3 (Kannada)
    tags: []
  sttSlngDeepgramNova3EnReceiveAudio:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en"
    summary: Send audio frame to Deepgram Nova 3 (English)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en/messages/DeepgramSttBinaryAudio"
    description: Send audio frame to Deepgram Nova 3 (English)
    tags: []
  sttSlngDeepgramNova3TeReceiveAudio:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te"
    summary: Send audio frame to Deepgram Nova 3 (Telugu)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te/messages/DeepgramSttBinaryAudio"
    description: Send audio frame to Deepgram Nova 3 (Telugu)
    tags: []
  sttSlngDeepgramNova3MrReceiveAudio:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr"
    summary: Send audio frame to Deepgram Nova 3 (Marathi)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr/messages/DeepgramSttBinaryAudio"
    description: Send audio frame to Deepgram Nova 3 (Marathi)
    tags: []
  sttSlngDeepgramNova3KnReceiveAudio:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn"
    summary: Send audio frame to Deepgram Nova 3 (Kannada)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn/messages/DeepgramSttBinaryAudio"
    description: Send audio frame to Deepgram Nova 3 (Kannada)
    tags: []
  sttSlngDeepgramNova3EnReceiveFinalize:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en"
    summary: Force-finalize buffered audio on Deepgram Nova 3 (English)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en/messages/SttFinalizeMessage"
    description: Force-finalize buffered audio on Deepgram Nova 3 (English)
    tags: []
  sttSlngDeepgramNova3TeReceiveFinalize:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te"
    summary: Force-finalize buffered audio on Deepgram Nova 3 (Telugu)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te/messages/SttFinalizeMessage"
    description: Force-finalize buffered audio on Deepgram Nova 3 (Telugu)
    tags: []
  sttSlngDeepgramNova3MrReceiveFinalize:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr"
    summary: Force-finalize buffered audio on Deepgram Nova 3 (Marathi)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr/messages/SttFinalizeMessage"
    description: Force-finalize buffered audio on Deepgram Nova 3 (Marathi)
    tags: []
  sttSlngDeepgramNova3KnReceiveFinalize:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn"
    summary: Force-finalize buffered audio on Deepgram Nova 3 (Kannada)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn/messages/SttFinalizeMessage"
    description: Force-finalize buffered audio on Deepgram Nova 3 (Kannada)
    tags: []
  sttSlngDeepgramNova3EnReceiveClose:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en"
    summary: Close audio stream on Deepgram Nova 3 (English)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en/messages/SttCloseMessage"
    description: Close audio stream on Deepgram Nova 3 (English)
    tags: []
  sttSlngDeepgramNova3TeReceiveClose:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te"
    summary: Close audio stream on Deepgram Nova 3 (Telugu)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te/messages/SttCloseMessage"
    description: Close audio stream on Deepgram Nova 3 (Telugu)
    tags: []
  sttSlngDeepgramNova3MrReceiveClose:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr"
    summary: Close audio stream on Deepgram Nova 3 (Marathi)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr/messages/SttCloseMessage"
    description: Close audio stream on Deepgram Nova 3 (Marathi)
    tags: []
  sttSlngDeepgramNova3KnReceiveClose:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn"
    summary: Close audio stream on Deepgram Nova 3 (Kannada)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn/messages/SttCloseMessage"
    description: Close audio stream on Deepgram Nova 3 (Kannada)
    tags: []
  sttSlngDeepgramNova3EnReceiveKeepalive:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en"
    summary: Send keepalive on Deepgram Nova 3 (English)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en/messages/KeepaliveMessage"
    description: Send keepalive on Deepgram Nova 3 (English)
    tags: []
  sttSlngDeepgramNova3TeReceiveKeepalive:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te"
    summary: Send keepalive on Deepgram Nova 3 (Telugu)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te/messages/KeepaliveMessage"
    description: Send keepalive on Deepgram Nova 3 (Telugu)
    tags: []
  sttSlngDeepgramNova3MrReceiveKeepalive:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr"
    summary: Send keepalive on Deepgram Nova 3 (Marathi)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr/messages/KeepaliveMessage"
    description: Send keepalive on Deepgram Nova 3 (Marathi)
    tags: []
  sttSlngDeepgramNova3KnReceiveKeepalive:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn"
    summary: Send keepalive on Deepgram Nova 3 (Kannada)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn/messages/KeepaliveMessage"
    description: Send keepalive on Deepgram Nova 3 (Kannada)
    tags: []
  sttSlngDeepgramNova3EnSendMetadata:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en"
    summary: Receive Deepgram session metadata from Nova 3 (English)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en/messages/DeepgramSttMetadata"
    description: |
      Receive Deepgram Metadata message. Sent when the backend connects and again after the session ends. Informational — do not wait for it before streaming audio.
    tags: []
  sttSlngDeepgramNova3TeSendMetadata:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te"
    summary: Receive Deepgram session metadata from Nova 3 (Telugu)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te/messages/DeepgramSttMetadata"
    description: |
      Receive Deepgram Metadata message. Sent when the backend connects and again after the session ends. Informational — do not wait for it before streaming audio.
    tags: []
  sttSlngDeepgramNova3MrSendMetadata:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr"
    summary: Receive Deepgram session metadata from Nova 3 (Marathi)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr/messages/DeepgramSttMetadata"
    description: |
      Receive Deepgram Metadata message. Sent when the backend connects and again after the session ends. Informational — do not wait for it before streaming audio.
    tags: []
  sttSlngDeepgramNova3KnSendMetadata:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn"
    summary: Receive Deepgram session metadata from Nova 3 (Kannada)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn/messages/DeepgramSttMetadata"
    description: |
      Receive Deepgram Metadata message. Sent when the backend connects and again after the session ends. Informational — do not wait for it before streaming audio.
    tags: []
  sttSlngDeepgramNova3EnSendResults:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en"
    summary: Receive transcription results from Deepgram Nova 3 (English)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en/messages/DeepgramSttResultsEn"
    description: |
      Receive Deepgram Results message. Use is_final to distinguish partial (interim) from final transcripts, and speech_final for end-of-utterance.
    tags: []
  sttSlngDeepgramNova3TeSendResults:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te"
    summary: Receive transcription results from Deepgram Nova 3 (Telugu)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te/messages/DeepgramSttResultsTe"
    description: |
      Receive Deepgram Results message. Use is_final to distinguish partial (interim) from final transcripts, and speech_final for end-of-utterance.
    tags: []
  sttSlngDeepgramNova3MrSendResults:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr"
    summary: Receive transcription results from Deepgram Nova 3 (Marathi)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr/messages/DeepgramSttResultsMr"
    description: |
      Receive Deepgram Results message. Use is_final to distinguish partial (interim) from final transcripts, and speech_final for end-of-utterance.
    tags: []
  sttSlngDeepgramNova3KnSendResults:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn"
    summary: Receive transcription results from Deepgram Nova 3 (Kannada)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn/messages/DeepgramSttResultsKn"
    description: |
      Receive Deepgram Results message. Use is_final to distinguish partial (interim) from final transcripts, and speech_final for end-of-utterance.
    tags: []
  sttSlngDeepgramNova3EnSendError:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en"
    summary: Receive error from Deepgram Nova 3 (English)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en/messages/DeepgramSttError"
    description: Receive error from Deepgram Nova 3 (English)
    tags: []
  sttSlngDeepgramNova3TeSendError:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te"
    summary: Receive error from Deepgram Nova 3 (Telugu)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te/messages/DeepgramSttError"
    description: Receive error from Deepgram Nova 3 (Telugu)
    tags: []
  sttSlngDeepgramNova3MrSendError:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr"
    summary: Receive error from Deepgram Nova 3 (Marathi)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr/messages/DeepgramSttError"
    description: Receive error from Deepgram Nova 3 (Marathi)
    tags: []
  sttSlngDeepgramNova3KnSendError:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn"
    summary: Receive error from Deepgram Nova 3 (Kannada)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn/messages/DeepgramSttError"
    description: Receive error from Deepgram Nova 3 (Kannada)
    tags: []
  sttSlngDeepgramNova3EsReceiveInit:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es"
    summary: Initialize session on Deepgram Nova 3 (Spanish)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es/messages/SlngDeepgramNova3EsSttInitRequest"
    description: Initialize session on Deepgram Nova 3 (Spanish)
    tags: []
  sttSlngDeepgramNova3EsReceiveAudio:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es"
    summary: Send audio frame to Deepgram Nova 3 (Spanish)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es/messages/DeepgramSttBinaryAudio"
    description: Send audio frame to Deepgram Nova 3 (Spanish)
    tags: []
  sttSlngDeepgramNova3EsReceiveFinalize:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es"
    summary: Force-finalize buffered audio on Deepgram Nova 3 (Spanish)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es/messages/SttFinalizeMessage"
    description: Force-finalize buffered audio on Deepgram Nova 3 (Spanish)
    tags: []
  sttSlngDeepgramNova3EsReceiveClose:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es"
    summary: Close audio stream on Deepgram Nova 3 (Spanish)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es/messages/SttCloseMessage"
    description: Close audio stream on Deepgram Nova 3 (Spanish)
    tags: []
  sttSlngDeepgramNova3EsReceiveKeepalive:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es"
    summary: Send keepalive on Deepgram Nova 3 (Spanish)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es/messages/KeepaliveMessage"
    description: Send keepalive on Deepgram Nova 3 (Spanish)
    tags: []
  sttSlngDeepgramNova3EsSendMetadata:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es"
    summary: Receive Deepgram session metadata from Nova 3 (Spanish)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es/messages/DeepgramSttMetadata"
    description: |
      Receive Deepgram Metadata message. Sent when the backend connects and again after the session ends. Informational — do not wait for it before streaming audio.
    tags: []
  sttSlngDeepgramNova3EsSendResults:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es"
    summary: Receive transcription results from Deepgram Nova 3 (Spanish)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es/messages/DeepgramSttResultsEs"
    description: |
      Receive Deepgram Results message. Use is_final to distinguish partial (interim) from final transcripts, and speech_final for end-of-utterance.
    tags: []
  sttSlngDeepgramNova3EsSendError:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es"
    summary: Receive error from Deepgram Nova 3 (Spanish)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es/messages/DeepgramSttError"
    description: Receive error from Deepgram Nova 3 (Spanish)
    tags: []
  sttSlngDeepgramNova3InReceiveInit:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-in"
    summary: Initialize session on Deepgram Nova 3 (Indonesian)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-in/messages/SlngDeepgramNova3InSttInitRequest"
    description: Initialize session on Deepgram Nova 3 (Indonesian)
    tags: []
  sttSlngDeepgramNova3InReceiveAudio:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-in"
    summary: Send audio frame to Deepgram Nova 3 (Indonesian)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-in/messages/DeepgramSttBinaryAudio"
    description: Send audio frame to Deepgram Nova 3 (Indonesian)
    tags: []
  sttSlngDeepgramNova3InReceiveFinalize:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-in"
    summary: Force-finalize buffered audio on Deepgram Nova 3 (Indonesian)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-in/messages/SttFinalizeMessage"
    description: Force-finalize buffered audio on Deepgram Nova 3 (Indonesian)
    tags: []
  sttSlngDeepgramNova3InReceiveClose:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-in"
    summary: Close audio stream on Deepgram Nova 3 (Indonesian)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-in/messages/SttCloseMessage"
    description: Close audio stream on Deepgram Nova 3 (Indonesian)
    tags: []
  sttSlngDeepgramNova3InReceiveKeepalive:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-in"
    summary: Send keepalive on Deepgram Nova 3 (Indonesian)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-in/messages/KeepaliveMessage"
    description: Send keepalive on Deepgram Nova 3 (Indonesian)
    tags: []
  sttSlngDeepgramNova3InSendMetadata:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-in"
    summary: Receive Deepgram session metadata from Nova 3 (Indonesian)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-in/messages/DeepgramSttMetadata"
    description: |
      Receive Deepgram Metadata message. Sent when the backend connects and again after the session ends. Informational — do not wait for it before streaming audio.
    tags: []
  sttSlngDeepgramNova3InSendResults:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-in"
    summary: Receive transcription results from Deepgram Nova 3 (Indonesian)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-in/messages/DeepgramSttResultsIn"
    description: |
      Receive Deepgram Results message. Use is_final to distinguish partial (interim) from final transcripts, and speech_final for end-of-utterance.
    tags: []
  sttSlngDeepgramNova3InSendError:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-in"
    summary: Receive error from Deepgram Nova 3 (Indonesian)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-in/messages/DeepgramSttError"
    description: Receive error from Deepgram Nova 3 (Indonesian)
    tags: []
  sttSlngDeepgramNova3HiReceiveInit:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-hi"
    summary: Initialize session on Deepgram Nova 3 (Hindi)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-hi/messages/SlngDeepgramNova3HiSttInitRequest"
    description: Initialize session on Deepgram Nova 3 (Hindi)
    tags: []
  sttSlngDeepgramNova3HiReceiveAudio:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-hi"
    summary: Send audio frame to Deepgram Nova 3 (Hindi)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-hi/messages/DeepgramSttBinaryAudio"
    description: Send audio frame to Deepgram Nova 3 (Hindi)
    tags: []
  sttSlngDeepgramNova3HiReceiveFinalize:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-hi"
    summary: Force-finalize buffered audio on Deepgram Nova 3 (Hindi)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-hi/messages/SttFinalizeMessage"
    description: Force-finalize buffered audio on Deepgram Nova 3 (Hindi)
    tags: []
  sttSlngDeepgramNova3HiReceiveClose:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-hi"
    summary: Close audio stream on Deepgram Nova 3 (Hindi)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-hi/messages/SttCloseMessage"
    description: Close audio stream on Deepgram Nova 3 (Hindi)
    tags: []
  sttSlngDeepgramNova3HiReceiveKeepalive:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-hi"
    summary: Send keepalive on Deepgram Nova 3 (Hindi)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-hi/messages/KeepaliveMessage"
    description: Send keepalive on Deepgram Nova 3 (Hindi)
    tags: []
  sttSlngDeepgramNova3HiSendMetadata:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-hi"
    summary: Receive Deepgram session metadata from Nova 3 (Hindi)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-hi/messages/DeepgramSttMetadata"
    description: |
      Receive Deepgram Metadata message. Sent when the backend connects and again after the session ends. Informational — do not wait for it before streaming audio.
    tags: []
  sttSlngDeepgramNova3HiSendResults:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-hi"
    summary: Receive transcription results from Deepgram Nova 3 (Hindi)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-hi/messages/DeepgramSttResultsHi"
    description: |
      Receive Deepgram Results message. Use is_final to distinguish partial (interim) from final transcripts, and speech_final for end-of-utterance.
    tags: []
  sttSlngDeepgramNova3HiSendError:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-hi"
    summary: Receive error from Deepgram Nova 3 (Hindi)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-hi/messages/DeepgramSttError"
    description: Receive error from Deepgram Nova 3 (Hindi)
    tags: []
  sttSlngDeepgramNova3MultiReceiveInit:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-multi"
    summary: Initialize session on Deepgram Nova 3 (Multi-Language)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-multi/messages/SlngDeepgramNova3MultiSttInitRequest"
    description: Initialize session on Deepgram Nova 3 (Multi-Language)
    tags: []
  sttSlngDeepgramNova3MultiReceiveAudio:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-multi"
    summary: Send audio frame to Deepgram Nova 3 (Multi-Language)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-multi/messages/DeepgramSttBinaryAudio"
    description: Send audio frame to Deepgram Nova 3 (Multi-Language)
    tags: []
  sttSlngDeepgramNova3MultiReceiveFinalize:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-multi"
    summary: Force-finalize buffered audio on Deepgram Nova 3 (Multi-Language)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-multi/messages/SttFinalizeMessage"
    description: Force-finalize buffered audio on Deepgram Nova 3 (Multi-Language)
    tags: []
  sttSlngDeepgramNova3MultiReceiveClose:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-multi"
    summary: Close audio stream on Deepgram Nova 3 (Multi-Language)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-multi/messages/SttCloseMessage"
    description: Close audio stream on Deepgram Nova 3 (Multi-Language)
    tags: []
  sttSlngDeepgramNova3MultiReceiveKeepalive:
    action: receive
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-multi"
    summary: Send keepalive on Deepgram Nova 3 (Multi-Language)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-multi/messages/KeepaliveMessage"
    description: Send keepalive on Deepgram Nova 3 (Multi-Language)
    tags: []
  sttSlngDeepgramNova3MultiSendMetadata:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-multi"
    summary: Receive Deepgram session metadata from Nova 3 (Multi-Language)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-multi/messages/DeepgramSttMetadata"
    description: |
      Receive Deepgram Metadata message. Sent when the backend connects and again after the session ends. Informational — do not wait for it before streaming audio.
    tags: []
  sttSlngDeepgramNova3MultiSendResults:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-multi"
    summary: Receive transcription results from Deepgram Nova 3 (Multi-Language)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-multi/messages/DeepgramSttResultsMulti"
    description: |
      Receive Deepgram Results message. Use is_final to distinguish partial (interim) from final transcripts, and speech_final for end-of-utterance.
    tags: []
  sttSlngDeepgramNova3MultiSendError:
    action: send
    channel:
      $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-multi"
    summary: Receive error from Deepgram Nova 3 (Multi-Language)
    messages:
      - $ref: "#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-multi/messages/DeepgramSttError"
    description: Receive error from Deepgram Nova 3 (Multi-Language)
    tags: []
components:
  messages:
    DeepgramSttResultsMulti:
      name: DeepgramSttResultsMulti
      title: Results
      summary: Deepgram transcription result — partial or final, determined by is_final.
      contentType: application/json
      payload:
        $ref: "#/components/schemas/DeepgramSttResultsPayload"
      examples:
        - name: deepgramResultsFinalMulti
          summary: Final transcription result
          payload:
            type: Results
            channel_index:
              - 0
              - 1
            duration: 3.52
            start: 0
            is_final: true
            speech_final: true
            channel:
              alternatives:
                - transcript: The quick brown fox jumps over the lazy dog.
                  confidence: 0.9980469
                  words:
                    - word: the
                      start: 0.08
                      end: 0.16
                      confidence: 0.9975586
                      punctuated_word: The
    SlngDeepgramNova3MultiSttInitRequest:
      name: SlngDeepgramNova3MultiSttInitRequest
      title: Init Request
      summary: Initialize an SLNG-hosted Deepgram Nova 3 multi-language STT session.
      contentType: application/json
      payload:
        $ref: "#/components/schemas/SlngDeepgramNova3MultiSttInitPayload"
      examples:
        - name: slngDeepgramInitMulti
          summary: Multi-language with utterances and paragraphs
          payload:
            type: init
            config:
              language: multi
              sample_rate: 16000
              encoding: linear16
              enable_partials: true
              smart_format: true
              utterances: true
              paragraphs: true
    DeepgramSttResultsIn:
      name: DeepgramSttResultsIn
      title: Results
      summary: Deepgram transcription result — partial or final, determined by is_final.
      contentType: application/json
      payload:
        $ref: "#/components/schemas/DeepgramSttResultsPayload"
      examples:
        - name: deepgramResultsFinalIn
          summary: Final transcription result
          payload:
            type: Results
            channel_index:
              - 0
              - 1
            duration: 3.84
            start: 0
            is_final: true
            speech_final: true
            channel:
              alternatives:
                - transcript: Halo, ini adalah tes transkripsi suara ke teks.
                  confidence: 0.9921875
                  words:
                    - word: halo
                      start: 0.08
                      end: 0.32
                      confidence: 0.9970703
                      punctuated_word: Halo,
                    - word: ini
                      start: 0.4
                      end: 0.56
                      confidence: 0.9951172
                      punctuated_word: ini
    SlngDeepgramNova3InSttInitRequest:
      name: SlngDeepgramNova3InSttInitRequest
      title: Init Request
      summary: Initialize an SLNG-hosted Deepgram Nova 3 Indonesian STT session.
      contentType: application/json
      payload:
        $ref: "#/components/schemas/SlngDeepgramNova3InSttInitPayload"
      examples:
        - name: slngDeepgramInitIn
          summary: Indonesian transcription with smart formatting
          payload:
            type: init
            config:
              language: id
              sample_rate: 16000
              encoding: linear16
              enable_partials: true
              smart_format: true
    DeepgramSttResultsHi:
      name: DeepgramSttResultsHi
      title: Results
      summary: Deepgram transcription result — partial or final, determined by is_final.
      contentType: application/json
      payload:
        $ref: "#/components/schemas/DeepgramSttResultsPayload"
      examples:
        - name: deepgramResultsFinalHi
          summary: Final transcription result
          payload:
            type: Results
            channel_index:
              - 0
              - 1
            duration: 4.49
            start: 0
            is_final: true
            speech_final: false
            channel:
              alternatives:
                - transcript: इसके बाद हम एक ऐसे खिलाड़ी के बारे में बात करेंगे जिससे इस world cup में भारतीय fans को
                  confidence: 0.9980469
                  words:
                    - word: इसके
                      start: 0.08
                      end: 0.32
                      confidence: 0.9970703
                      punctuated_word: इसके
                    - word: बाद
                      start: 0.32
                      end: 0.48
                      confidence: 0.9980469
                      punctuated_word: बाद
    SlngDeepgramNova3HiSttInitRequest:
      name: SlngDeepgramNova3HiSttInitRequest
      title: Init Request
      summary: Initialize an SLNG-hosted Deepgram Nova 3 Hindi STT session.
      contentType: application/json
      payload:
        $ref: "#/components/schemas/SlngDeepgramNova3HiSttInitPayload"
      examples:
        - name: slngDeepgramInitHi
          summary: Hindi transcription with diarization
          payload:
            type: init
            config:
              language: hi
              sample_rate: 16000
              encoding: linear16
              enable_partials: true
              smart_format: true
              diarize: true
        - name: slngDeepgramInitHiEn
          summary: English transcription on the Hindi variant
          payload:
            type: init
            config:
              language: en
              sample_rate: 16000
              encoding: linear16
              enable_partials: true
              smart_format: true
    DeepgramSttResultsEs:
      name: DeepgramSttResultsEs
      title: Results
      summary: Deepgram transcription result — partial or final, determined by is_final.
      contentType: application/json
      payload:
        $ref: "#/components/schemas/DeepgramSttResultsPayload"
      examples:
        - name: deepgramResultsFinalEs
          summary: Final transcription result
          payload:
            type: Results
            channel_index:
              - 0
              - 1
            duration: 3.84
            start: 0
            is_final: true
            speech_final: true
            channel:
              alternatives:
                - transcript: Hola, esto es una prueba de transcripción de voz a texto.
                  confidence: 0.9921875
                  words:
                    - word: hola
                      start: 0.08
                      end: 0.32
                      confidence: 0.9970703
                      punctuated_word: Hola,
                    - word: esto
                      start: 0.4
                      end: 0.56
                      confidence: 0.9951172
                      punctuated_word: esto
    SlngDeepgramNova3EsSttInitRequest:
      name: SlngDeepgramNova3EsSttInitRequest
      title: Init Request
      summary: Initialize an SLNG-hosted Deepgram Nova 3 Spanish STT session.
      contentType: application/json
      payload:
        $ref: "#/components/schemas/SlngDeepgramNova3EsSttInitPayload"
      examples:
        - name: slngDeepgramInitEs
          summary: Spanish transcription with smart formatting
          payload:
            type: init
            config:
              language: es
              sample_rate: 16000
              encoding: linear16
              enable_partials: true
              smart_format: true
    DeepgramSttError:
      name: DeepgramSttError
      title: Error
      summary: Error from the Deepgram backend or gateway.
      contentType: application/json
      payload:
        type: object
        description: |
          Error message. May originate from the gateway (with code field) or from Deepgram directly (with variant and description fields).
        required:
          - type
        properties:
          type:
            type: string
            const: Error
          code:
            type: string
            description: Gateway error code (e.g., backend_connection_failed, stt_metering_unavailable)
          message:
            type: string
            description: Human-readable error description (gateway errors)
          variant:
            type: string
            description: Deepgram error variant (e.g., SchemaError)
          description:
            type: string
            description: Deepgram error description
      examples:
        - name: deepgramBackendError
          summary: Backend connection failure
          payload:
            type: Error
            code: backend_connection_failed
            message: "Failed to connect to backend: 500 Internal Server Error"
        - name: deepgramSchemaError
          summary: Invalid message schema
          payload:
            type: Error
            variant: SchemaError
            description: "Could not deserialize last text message: unknown variant"
    DeepgramSttResultsEn:
      name: DeepgramSttResultsEn
      title: Results
      summary: Deepgram transcription result — partial or final, determined by is_final.
      contentType: application/json
      payload:
        $ref: "#/components/schemas/DeepgramSttResultsPayload"
      examples:
        - name: deepgramResultsFinalEn
          summary: Final transcription result
          payload:
            type: Results
            channel_index:
              - 0
              - 1
            duration: 3.52
            start: 0
            is_final: true
            speech_final: true
            channel:
              alternatives:
                - transcript: The quick brown fox jumps over the lazy dog.
                  confidence: 0.9980469
                  words:
                    - word: the
                      start: 0.08
                      end: 0.16
                      confidence: 0.9975586
                      punctuated_word: The
                    - word: quick
                      start: 0.16
                      end: 0.4
                      confidence: 0.9951172
                      punctuated_word: quick
                    - word: brown
                      start: 0.4
                      end: 0.64
                      confidence: 0.9980469
                      punctuated_word: brown
    DeepgramSttResultsTe:
      name: DeepgramSttResultsTe
      title: Results
      summary: Deepgram transcription result — partial or final, determined by is_final.
      contentType: application/json
      payload:
        $ref: "#/components/schemas/DeepgramSttResultsPayload"
      examples:
        - name: deepgramResultsFinalTe
          summary: Final transcription result
          payload:
            type: Results
            channel_index:
              - 0
              - 1
            duration: 3.52
            start: 0
            is_final: true
            speech_final: true
            channel:
              alternatives:
                - transcript: The quick brown fox jumps over the lazy dog.
                  confidence: 0.9980469
                  words:
                    - word: the
                      start: 0.08
                      end: 0.16
                      confidence: 0.9975586
                      punctuated_word: The
                    - word: quick
                      start: 0.16
                      end: 0.4
                      confidence: 0.9951172
                      punctuated_word: quick
                    - word: brown
                      start: 0.4
                      end: 0.64
                      confidence: 0.9980469
                      punctuated_word: brown
    DeepgramSttResultsTa:
      name: DeepgramSttResultsTa
      title: Results
      summary: Deepgram transcription result — partial or final, determined by is_final.
      contentType: application/json
      payload:
        $ref: "#/components/schemas/DeepgramSttResultsPayload"
      examples:
        - name: deepgramResultsFinalTa
          summary: Final transcription result
          payload:
            type: Results
            channel_index:
              - 0
              - 1
            duration: 3.52
            start: 0
            is_final: true
            speech_final: true
            channel:
              alternatives:
                - transcript: The quick brown fox jumps over the lazy dog.
                  confidence: 0.9980469
                  words:
                    - word: the
                      start: 0.08
                      end: 0.16
                      confidence: 0.9975586
                      punctuated_word: The
                    - word: quick
                      start: 0.16
                      end: 0.4
                      confidence: 0.9951172
                      punctuated_word: quick
                    - word: brown
                      start: 0.4
                      end: 0.64
                      confidence: 0.9980469
                      punctuated_word: brown
    DeepgramSttResultsMr:
      name: DeepgramSttResultsMr
      title: Results
      summary: Deepgram transcription result — partial or final, determined by is_final.
      contentType: application/json
      payload:
        $ref: "#/components/schemas/DeepgramSttResultsPayload"
      examples:
        - name: deepgramResultsFinalMr
          summary: Final transcription result
          payload:
            type: Results
            channel_index:
              - 0
              - 1
            duration: 3.52
            start: 0
            is_final: true
            speech_final: true
            channel:
              alternatives:
                - transcript: The quick brown fox jumps over the lazy dog.
                  confidence: 0.9980469
                  words:
                    - word: the
                      start: 0.08
                      end: 0.16
                      confidence: 0.9975586
                      punctuated_word: The
                    - word: quick
                      start: 0.16
                      end: 0.4
                      confidence: 0.9951172
                      punctuated_word: quick
                    - word: brown
                      start: 0.4
                      end: 0.64
                      confidence: 0.9980469
                      punctuated_word: brown
    DeepgramSttResultsKn:
      name: DeepgramSttResultsKn
      title: Results
      summary: Deepgram transcription result — partial or final, determined by is_final.
      contentType: application/json
      payload:
        $ref: "#/components/schemas/DeepgramSttResultsPayload"
      examples:
        - name: deepgramResultsFinalKn
          summary: Final transcription result
          payload:
            type: Results
            channel_index:
              - 0
              - 1
            duration: 3.52
            start: 0
            is_final: true
            speech_final: true
            channel:
              alternatives:
                - transcript: The quick brown fox jumps over the lazy dog.
                  confidence: 0.9980469
                  words:
                    - word: the
                      start: 0.08
                      end: 0.16
                      confidence: 0.9975586
                      punctuated_word: The
                    - word: quick
                      start: 0.16
                      end: 0.4
                      confidence: 0.9951172
                      punctuated_word: quick
                    - word: brown
                      start: 0.4
                      end: 0.64
                      confidence: 0.9980469
                      punctuated_word: brown
    DeepgramSttMetadata:
      name: DeepgramSttMetadata
      title: Metadata
      summary: |
        Deepgram session metadata. Sent when the backend connects and again after the session ends with final statistics. This is informational — do not wait for it before streaming audio.
      contentType: application/json
      payload:
        type: object
        description: |
          Deepgram native Metadata message. Received twice: once when the session opens (duration=0) and once after finalize with the full session summary.
        required:
          - type
        properties:
          type:
            type: string
            const: Metadata
          request_id:
            type: string
            description: Unique Deepgram request identifier
          created:
            type: string
            format: date-time
            description: Timestamp when the session was created
          duration:
            type: number
            description: Total audio duration processed in seconds (0 on initial, populated on final)
          channels:
            type: integer
            description: Number of audio channels
          sha256:
            type: string
            description: SHA-256 hash of the audio (populated on final Metadata only)
          transaction_key:
            type: string
            description: Deprecated field (always "deprecated")
      examples:
        - name: deepgramMetadataOpen
          summary: Session opened (initial Metadata)
          payload:
            type: Metadata
            request_id: a2b1db35-40ff-41f9-9912-dedaeab02228
            created: 2026-04-01T09:40:09.152Z
            duration: 0
            channels: 1
            sha256: incomplete
            transaction_key: deprecated
        - name: deepgramMetadataFinal
          summary: Session complete (final Metadata)
          payload:
            type: Metadata
            request_id: a2b1db35-40ff-41f9-9912-dedaeab02228
            created: 2026-04-01T09:40:09.152Z
            duration: 19.78
            channels: 1
            sha256: 34f3ece92c8345e1fbcb497f5189a3b1448457e6ab18d93d6234308580a3fd81
            transaction_key: deprecated
    KeepaliveMessage:
      name: KeepaliveMessage
      title: Keepalive Message
      summary: Keep the WebSocket connection alive during silence.
      contentType: application/json
      payload:
        type: object
        description: Prevents the connection from being closed due to inactivity. Send periodically during silence to maintain the session.
        required:
          - type
        properties:
          type:
            type: string
            const: keepalive
      examples:
        - name: keepalive
          summary: Send keepalive
          payload:
            type: keepalive
    DeepgramSttBinaryAudio:
      name: DeepgramSttBinaryAudio
      title: Binary Audio Frame
      summary: |
        Stream raw binary PCM audio frames to be transcribed. Sent as binary WebSocket frames (NOT JSON). Recommended chunk size is 8192 bytes (~256ms at 16kHz linear16). Start streaming immediately after the init message — do not wait for the Metadata response.
      contentType: application/octet-stream
      payload:
        type: string
        format: binary
        description: |
          Raw binary audio data (linear16 PCM at 16kHz mono). Sent as a binary WebSocket frame — no JSON envelope, no base64 encoding. Each frame is a chunk of raw PCM samples. Example hex dump of one frame (speech waveform): 0000FF00000000FF00000000010101010101010100000000FFFFFFFEFE FEFEFDFEFEFEFEFDFDFEFEFEFEFEFEFEFEFEFFFFFFFFFEFEFEFEFF000100 001020303030303030303030201010000FFFFFEFDFDFDFDFEFFFFFFFF00 Each pair of hex digits is one byte. At 16kHz linear16, 8192 bytes = 4096 samples = ~256ms of audio.
      examples:
        - name: binaryAudioFrame
          summary: Raw PCM audio frame (~256ms of 16kHz linear16 speech)
          payload: 0000FF00000000FF00000000010101010101010100000000FFFFFFFFFFFFFEFEFDFEFEFEFEFDFDFEFEFEFEFEFEFEFEFEFFFFFFFFFEFEFEFEFF000100001020303030303030303030201010000FFFFFEFDFDFDFDFEFFFFFFFF0001020303020201000000FFFDFCFBFAFAFBFAF9F8F7F7F7F6F6F4F2F2F3F7FC000406090F14191A19181715110E0A05FEF9F6F3F0EEECEBEBECEEF2F6F9FC0005090D0F101010100E0C080401
    SlngDeepgramNova3EnSttInitRequest:
      name: SlngDeepgramNova3EnSttInitRequest
      title: Init Request
      summary: Initialize an SLNG-hosted Deepgram Nova 3 English STT session.
      contentType: application/json
      payload:
        $ref: "#/components/schemas/SlngDeepgramNova3EnSttInitPayload"
      examples:
        - name: slngDeepgramInitEn
          summary: English transcription with utterance segmentation
          payload:
            type: init
            config:
              language: en
              sample_rate: 16000
              encoding: linear16
              enable_partials: true
              smart_format: true
              utterances: true
    SlngDeepgramNova3TeSttInitRequest:
      name: SlngDeepgramNova3TeSttInitRequest
      title: Init Request
      summary: Initialize an SLNG-hosted Deepgram Nova 3 Telugu STT session.
      contentType: application/json
      payload:
        $ref: "#/components/schemas/SlngDeepgramNova3TeSttInitPayload"
      examples:
        - name: slngDeepgramInitTe
          summary: Telugu transcription with utterance segmentation
          payload:
            type: init
            config:
              language: te
              sample_rate: 16000
              encoding: linear16
              enable_partials: true
              smart_format: true
              utterances: true
    SlngDeepgramNova3TaSttInitRequest:
      name: SlngDeepgramNova3TaSttInitRequest
      title: Init Request
      summary: Initialize an SLNG-hosted Deepgram Nova 3 Tamil STT session.
      contentType: application/json
      payload:
        $ref: "#/components/schemas/SlngDeepgramNova3TaSttInitPayload"
      examples:
        - name: slngDeepgramInitTa
          summary: Tamil transcription with utterance segmentation
          payload:
            type: init
            config:
              language: ta
              sample_rate: 16000
              encoding: linear16
              enable_partials: true
              smart_format: true
              utterances: true
    SlngDeepgramNova3MrSttInitRequest:
      name: SlngDeepgramNova3MrSttInitRequest
      title: Init Request
      summary: Initialize an SLNG-hosted Deepgram Nova 3 Marathi STT session.
      contentType: application/json
      payload:
        $ref: "#/components/schemas/SlngDeepgramNova3MrSttInitPayload"
      examples:
        - name: slngDeepgramInitMr
          summary: Marathi transcription with utterance segmentation
          payload:
            type: init
            config:
              language: mr
              sample_rate: 16000
              encoding: linear16
              enable_partials: true
              smart_format: true
              utterances: true
    SlngDeepgramNova3KnSttInitRequest:
      name: SlngDeepgramNova3KnSttInitRequest
      title: Init Request
      summary: Initialize an SLNG-hosted Deepgram Nova 3 Kannada STT session.
      contentType: application/json
      payload:
        $ref: "#/components/schemas/SlngDeepgramNova3KnSttInitPayload"
      examples:
        - name: slngDeepgramInitKn
          summary: Kannada transcription with utterance segmentation
          payload:
            type: init
            config:
              language: kn
              sample_rate: 16000
              encoding: linear16
              enable_partials: true
              smart_format: true
              utterances: true
    SttErrorResponse:
      name: SttErrorResponse
      title: Error Response
      summary: Indicates an error occurred during recognition.
      contentType: application/json
      payload:
        type: object
        description: Indicates an error occurred during recognition.
        required:
          - type
          - code
          - message
        properties:
          type:
            type: string
            const: error
          code:
            type: string
            description: Error code (e.g., auth_error, config_error, rate_limit, provider_error)
          message:
            type: string
            description: Human-readable error description
      examples:
        - name: authError
          summary: Authentication error
          payload:
            type: error
            code: auth_error
            message: Invalid or expired API key
    SlngWhisperSttFinalTranscript:
      name: SlngWhisperSttFinalTranscript
      title: Final Transcript
      summary: Final Whisper transcription result with segment-level detail.
      contentType: application/json
      payload:
        type: object
        description: Final transcription result from Whisper. Includes the complete transcript, segment-level timing with log probabilities, and total audio duration.
        required:
          - type
          - transcript
        properties:
          type:
            type: string
            const: final_transcript
          transcript:
            type: string
            description: Final transcription text.
          confidence:
            type: number
            minimum: 0
            maximum: 1
            description: Confidence score (0-1).
          language:
            type: string
            description: Detected language code.
          context_id:
            type: string
            description: Context identifier for correlating messages.
          session_id:
            type: string
            description: Session identifier.
          is_final:
            type: boolean
            description: Always true for final transcripts.
          audio_duration:
            type: number
            description: Total duration of audio processed, in seconds.
          segments:
            type: array
            description: Whisper segment-level detail with timing and log probabilities.
            items:
              type: object
              properties:
                text:
                  type: string
                  description: Transcribed text for this segment.
                start:
                  type: number
                  description: Segment start time in seconds.
                end:
                  type: number
                  description: Segment end time in seconds.
                avg_logprob:
                  type: number
                  description: Average log probability for this segment (higher = more confident).
      examples:
        - name: whisperFinal
          summary: Final transcription with segment detail
          payload:
            type: final_transcript
            context_id: stt-a1b2c3d4-e5f6-7890-abcd-ef1234567890
            session_id: a1b2c3d4-e5f6-7890-abcd-ef1234567890
            transcript: The quick brown fox jumps over the lazy dog.
            language: en
            confidence: 1
            is_final: true
            audio_duration: 3.84
            segments:
              - text: " The quick brown fox jumps over the lazy dog."
                start: 0.066
                end: 3.71
                avg_logprob: -0.08
    SlngWhisperSttPartialTranscript:
      name: SlngWhisperSttPartialTranscript
      title: Partial Transcript
      summary: Interim Whisper transcription result, updated as more audio is processed.
      contentType: application/json
      payload:
        type: object
        description: Interim transcription result from Whisper. Sent progressively as audio is processed, allowing real-time display of in-progress transcription.
        required:
          - type
          - transcript
        properties:
          type:
            type: string
            const: partial_transcript
          transcript:
            type: string
            description: Interim transcription text, updated as more audio is processed.
          confidence:
            type: number
            minimum: 0
            maximum: 1
            description: Confidence score (0-1).
          language:
            type: string
            description: Detected language code.
          context_id:
            type: string
            description: Context identifier for correlating messages.
          session_id:
            type: string
            description: Session identifier.
          is_final:
            type: boolean
            description: Always false for partial transcripts.
          audio_duration:
            type: number
            description: Duration of audio processed so far, in seconds.
      examples:
        - name: whisperPartial
          summary: Partial transcription in progress
          payload:
            type: partial_transcript
            context_id: stt-a1b2c3d4-e5f6-7890-abcd-ef1234567890
            session_id: a1b2c3d4-e5f6-7890-abcd-ef1234567890
            transcript: The quick brown fox jumps over the
            language: en
            confidence: 1
            is_final: false
            audio_duration: 2.56
    SlngWhisperSttReadyResponse:
      name: SlngWhisperSttReadyResponse
      title: Ready Response
      summary: Indicates the Whisper session is ready to receive audio.
      contentType: application/json
      payload:
        type: object
        description: Indicates the Whisper session is initialized and ready to receive audio. Includes model info, supported commands, and enabled features.
        required:
          - type
          - session_id
        properties:
          type:
            type: string
            const: ready
          session_id:
            type: string
            description: Unique session identifier.
          context_id:
            type: string
            description: Context identifier for correlating messages within this session.
          model:
            type: string
            description: Model identifier used for this session.
            example: whisper-large-v3
          commands:
            type: array
            description: Supported control commands for this session.
            items:
              type: string
            example:
              - flush
              - stop
              - clear
              - context
          features:
            type: object
            description: Capabilities enabled for this session.
            properties:
              vad:
                type: boolean
                description: Voice Activity Detection enabled.
              partial_transcripts:
                type: boolean
                description: Partial transcript streaming enabled.
              final_transcripts:
                type: boolean
                description: Final transcript delivery enabled.
              language_detection:
                type: boolean
                description: Automatic language detection enabled.
              speaker_diarization:
                type: boolean
                description: Reported by the model but not currently functional. Speaker labels are not included in transcript payloads.
      examples:
        - name: whisperReady
          summary: Whisper session ready with all features enabled
          payload:
            type: ready
            session_id: a1b2c3d4-e5f6-7890-abcd-ef1234567890
            context_id: stt-a1b2c3d4-e5f6-7890-abcd-ef1234567890
            model: whisper-large-v3
            commands:
              - flush
              - stop
              - clear
              - context
            features:
              vad: true
              partial_transcripts: true
              final_transcripts: true
              language_detection: true
              speaker_diarization: true
    SttCloseMessage:
      name: SttCloseMessage
      title: Close Message
      summary: Signal end of audio stream and close the connection.
      contentType: application/json
      payload:
        type: object
        description: Signal that no more audio will be sent. The server processes remaining audio, sends final results, then closes the connection.
        required:
          - type
        properties:
          type:
            type: string
            const: close
      examples:
        - name: close
          summary: Close the audio stream
          payload:
            type: close
    SttFinalizeMessage:
      name: SttFinalizeMessage
      title: Finalize Message
      summary: Force-finalize buffered audio tokens without closing the connection.
      contentType: application/json
      payload:
        type: object
        description: Mid-stream flush — forces the server to finalize any buffered audio and return results. The connection remains open for further audio.
        required:
          - type
        properties:
          type:
            type: string
            const: finalize
      examples:
        - name: finalize
          summary: Force-finalize buffered audio
          payload:
            type: finalize
    SttAudioMessage:
      name: SttAudioMessage
      title: Audio Message
      summary: Stream an audio frame to be transcribed.
      contentType: application/json
      payload:
        type: object
        description: Stream an audio frame to be transcribed.
        required:
          - type
          - data
        properties:
          type:
            type: string
            const: audio
          data:
            type: string
            format: byte
            description: Base64-encoded audio data
      examples:
        - name: audioFrame
          summary: Send a base64-encoded audio frame
          payload:
            type: audio
            data: UklGRiQAAABXQVZFZm10IBAAAAABAAEA...
    SlngWhisperLargeV3SttInitRequest:
      name: SlngWhisperLargeV3SttInitRequest
      title: Init Request
      summary: Initialize an SLNG-hosted Whisper Large v3 STT session.
      contentType: application/json
      payload:
        $ref: "#/components/schemas/SlngWhisperSttInitPayload"
      examples:
        - name: slngWhisperInitEn
          summary: English transcription at 16kHz
          payload:
            type: init
            config:
              language: en
              sample_rate: 16000
              encoding: linear16
  schemas:
    DeepgramSttResultsPayload:
      type: object
      description: |
        Deepgram native Results message. Contains the transcription in channel.alternatives[0].transcript. Use is_final to distinguish partial (interim) from final results, and speech_final to detect end-of-utterance boundaries.
      required:
        - type
        - channel
      properties:
        type:
          type: string
          const: Results
        is_final:
          type: boolean
          description: true for final results, false for interim/partial
        speech_final:
          type: boolean
          description: true when endpoint detection fires (end of utterance)
        channel_index:
          type: array
          items:
            type: integer
          description: Channel index pair [channel, total_channels]
        channel:
          type: object
          description: Deepgram channel result with transcription alternatives
          properties:
            alternatives:
              type: array
              items:
                type: object
                properties:
                  transcript:
                    type: string
                    description: Transcribed text
                  confidence:
                    type: number
                    description: Confidence score (0-1)
                  words:
                    type: array
                    description: Word-level transcription details
                    items:
                      type: object
                      properties:
                        word:
                          type: string
                        start:
                          type: number
                          description: Word start time in seconds
                        end:
                          type: number
                          description: Word end time in seconds
                        confidence:
                          type: number
                        speaker:
                          type: integer
                          description: Speaker ID (when diarization enabled)
                        punctuated_word:
                          type: string
        start:
          type: number
          description: Start time of this segment in seconds
        duration:
          type: number
          description: Duration of this segment in seconds
    SlngDeepgramNova3MultiSttInitPayload:
      type: object
      required:
        - type
      properties:
        type:
          type: string
          const: init
        config:
          type: object
          description: Recognition configuration options
          properties:
            language:
              type: string
              description: Supported language code.
              default: multi
              enum:
                - multi
            sample_rate:
              type: integer
              description: Input audio sample rate in Hz.
              default: 16000
            encoding:
              type: string
              description: Input audio encoding format.
              default: linear16
              enum:
                - linear16
                - flac
                - mulaw
                - amr-nb
                - amr-wb
                - opus
                - speex
                - mp3
                - mp4
                - webm
                - aac
                - ogg
            enable_partials:
              type: boolean
              description: Enable partial/interim transcription results.
              default: true
            punctuate:
              type: boolean
              description: Add punctuation and capitalization.
              default: false
            smart_format:
              type: boolean
              description: Apply formatting to improve readability (dates, times, numbers, etc.).
              default: false
            diarize:
              type: boolean
              description: Enable speaker diarization. Words assigned speaker numbers starting at 0.
              default: false
            numerals:
              type: boolean
              description: Convert spoken numbers to digits.
              default: false
            profanity_filter:
              type: boolean
              description: Filter profanity from transcript.
              default: false
            utterances:
              type: boolean
              description: Segment transcript into utterances.
              default: false
            paragraphs:
              type: boolean
              description: Add paragraph formatting.
              default: false
            filler_words:
              type: boolean
              description: Include filler words (uh, um) in transcript.
              default: false
            multichannel:
              type: boolean
              description: Enable multi-channel audio processing.
              default: false
            endpointing:
              type: integer
              minimum: 0
              default: 10
              description: Time in milliseconds of silence before finalizing speech. Set to 0 to disable endpointing entirely.
            utterance_end_ms:
              type: integer
              minimum: 200
              maximum: 5000
              default: 1000
              description: Time in milliseconds of silence between words before sending an UtteranceEnd message. Default is 1000ms, minimum 200ms, maximum 5000ms. Requires enable_partials to be true.
    WebsocketHeadersSlngNovaIn:
      type: object
      properties:
        X-Region-Override:
          type: string
          description: "Target region override. Auto-selected if not provided. Available regions: `asia-southeast2`."
          enum:
            - asia-southeast2
        X-World-Part-Override:
          type: string
          description: "Target world part override. Auto-selected if not provided. Available world parts: `ap`."
          enum:
            - ap
    SlngDeepgramNova3InSttInitPayload:
      type: object
      required:
        - type
      properties:
        type:
          type: string
          const: init
        config:
          type: object
          description: Recognition configuration options
          properties:
            language:
              type: string
              description: Supported language codes for the Indonesian variant.
              default: id
              enum:
                - id
                - en
            sample_rate:
              type: integer
              description: Input audio sample rate in Hz.
              default: 16000
            encoding:
              type: string
              description: Input audio encoding format.
              default: linear16
              enum:
                - linear16
                - flac
                - mulaw
                - amr-nb
                - amr-wb
                - opus
                - speex
                - mp3
                - mp4
                - webm
                - aac
                - ogg
            enable_partials:
              type: boolean
              description: Enable partial/interim transcription results.
              default: true
            punctuate:
              type: boolean
              description: Add punctuation and capitalization.
              default: false
            smart_format:
              type: boolean
              description: Apply formatting to improve readability (dates, times, numbers, etc.).
              default: false
            diarize:
              type: boolean
              description: Enable speaker diarization. Words assigned speaker numbers starting at 0.
              default: false
            numerals:
              type: boolean
              description: Convert spoken numbers to digits.
              default: false
            profanity_filter:
              type: boolean
              description: Filter profanity from transcript.
              default: false
            utterances:
              type: boolean
              description: Segment transcript into utterances.
              default: false
            paragraphs:
              type: boolean
              description: Add paragraph formatting.
              default: false
            filler_words:
              type: boolean
              description: Include filler words (uh, um) in transcript.
              default: false
            multichannel:
              type: boolean
              description: Enable multi-channel audio processing.
              default: false
            endpointing:
              type: integer
              minimum: 0
              default: 10
              description: Time in milliseconds of silence before finalizing speech. Set to 0 to disable endpointing entirely.
            utterance_end_ms:
              type: integer
              minimum: 200
              maximum: 5000
              default: 1000
              description: Time in milliseconds of silence between words before sending an UtteranceEnd message. Default is 1000ms, minimum 200ms, maximum 5000ms. Requires enable_partials to be true.
    WebsocketHeadersSlngNovaHi:
      type: object
      properties:
        X-Region-Override:
          type: string
          description: "Target region override. Auto-selected if not provided. Available regions: `ap-southeast-2`, `ap-south-1`."
          enum:
            - asia-south1
        X-World-Part-Override:
          type: string
          description: "Target world part override. Auto-selected if not provided. Available world parts: `eu`."
          enum:
            - ap
    SlngDeepgramNova3HiSttInitPayload:
      type: object
      required:
        - type
      properties:
        type:
          type: string
          const: init
        config:
          type: object
          description: Recognition configuration options
          properties:
            language:
              type: string
              description: Supported language codes for the Hindi variant.
              default: hi
              enum:
                - hi
                - en
            sample_rate:
              type: integer
              description: Input audio sample rate in Hz.
              default: 16000
            encoding:
              type: string
              description: Input audio encoding format.
              default: linear16
              enum:
                - linear16
                - flac
                - mulaw
                - amr-nb
                - amr-wb
                - opus
                - speex
                - mp3
                - mp4
                - webm
                - aac
                - ogg
            enable_partials:
              type: boolean
              description: Enable partial/interim transcription results.
              default: true
            punctuate:
              type: boolean
              description: Add punctuation and capitalization.
              default: false
            smart_format:
              type: boolean
              description: Apply formatting to improve readability (dates, times, numbers, etc.).
              default: false
            diarize:
              type: boolean
              description: Enable speaker diarization. Words assigned speaker numbers starting at 0.
              default: false
            numerals:
              type: boolean
              description: Convert spoken numbers to digits.
              default: false
            profanity_filter:
              type: boolean
              description: Filter profanity from transcript.
              default: false
            utterances:
              type: boolean
              description: Segment transcript into utterances.
              default: false
            paragraphs:
              type: boolean
              description: Add paragraph formatting.
              default: false
            filler_words:
              type: boolean
              description: Include filler words (uh, um) in transcript.
              default: false
            multichannel:
              type: boolean
              description: Enable multi-channel audio processing.
              default: false
            endpointing:
              type: integer
              minimum: 0
              default: 10
              description: Time in milliseconds of silence before finalizing speech. Set to 0 to disable endpointing entirely.
            utterance_end_ms:
              type: integer
              minimum: 200
              maximum: 5000
              default: 1000
              description: Time in milliseconds of silence between words before sending an UtteranceEnd message. Default is 1000ms, minimum 200ms, maximum 5000ms. Requires enable_partials to be true.
    SlngDeepgramNova3EsSttInitPayload:
      type: object
      required:
        - type
      properties:
        type:
          type: string
          const: init
        config:
          type: object
          description: Recognition configuration options
          properties:
            language:
              type: string
              description: Supported Spanish language code.
              default: es
              enum:
                - es
                - es-us
                - es-419
                - es-ar
                - es-mx
                - es-es
            sample_rate:
              type: integer
              description: Input audio sample rate in Hz.
              default: 16000
            encoding:
              type: string
              description: Input audio encoding format.
              default: linear16
              enum:
                - linear16
                - flac
                - mulaw
                - amr-nb
                - amr-wb
                - opus
                - speex
                - mp3
                - mp4
                - webm
                - aac
                - ogg
            enable_partials:
              type: boolean
              description: Enable partial/interim transcription results.
              default: true
            punctuate:
              type: boolean
              description: Add punctuation and capitalization.
              default: false
            smart_format:
              type: boolean
              description: Apply formatting to improve readability (dates, times, numbers, etc.).
              default: false
            diarize:
              type: boolean
              description: Enable speaker diarization. Words assigned speaker numbers starting at 0.
              default: false
            numerals:
              type: boolean
              description: Convert spoken numbers to digits.
              default: false
            profanity_filter:
              type: boolean
              description: Filter profanity from transcript.
              default: false
            utterances:
              type: boolean
              description: Segment transcript into utterances.
              default: false
            paragraphs:
              type: boolean
              description: Add paragraph formatting.
              default: false
            filler_words:
              type: boolean
              description: Include filler words (uh, um) in transcript.
              default: false
            multichannel:
              type: boolean
              description: Enable multi-channel audio processing.
              default: false
            endpointing:
              type: integer
              minimum: 0
              default: 10
              description: Time in milliseconds of silence before finalizing speech. Set to 0 to disable endpointing entirely.
            utterance_end_ms:
              type: integer
              minimum: 200
              maximum: 5000
              default: 1000
              description: Time in milliseconds of silence between words before sending an UtteranceEnd message. Default is 1000ms, minimum 200ms, maximum 5000ms. Requires enable_partials to be true.
    WebsocketHeadersSlngNovaEn:
      type: object
      properties:
        X-Region-Override:
          type: string
          description: "Target region override. Auto-selected if not provided. Available regions: `asia-south1`, `australia-southeast1`, `us-east-1`."
          enum:
            - asia-south1
            - australia-southeast1
            - us-east-1
    WebsocketHeadersSlngNovaEs:
      type: object
      properties:
        X-Region-Override:
          type: string
          description: "Target region override. Auto-selected if not provided. Available regions: `us-east-1`."
          enum:
            - us-east-1
    WebsocketHeadersSlngNovaTa:
      type: object
      properties:
        X-Region-Override:
          type: string
          description: "Target region override. Auto-selected if not provided. Available regions: `ap-south-1`."
          enum:
            - ap-south-1
    WebsocketHeadersSlngNovaTe:
      type: object
      properties:
        X-Region-Override:
          type: string
          description: "Target region override. Auto-selected if not provided. Available regions: `asia-south1`."
          enum:
            - asia-south1
    WebsocketHeadersSlngNovaMr:
      type: object
      properties:
        X-Region-Override:
          type: string
          description: "Target region override. Auto-selected if not provided. Available regions: `asia-south1`."
          enum:
            - asia-south1
    WebsocketHeadersSlngNovaKn:
      type: object
      properties:
        X-Region-Override:
          type: string
          description: "Target region override. Auto-selected if not provided. Available regions: `asia-south1`."
          enum:
            - asia-south1
    WebsocketHeadersSlngNovaMulti:
      type: object
      properties:
        X-Region-Override:
          type: string
          description: "Target region override. Auto-selected if not provided. Available regions: `eu-north-1`."
          enum:
            - eu-north-1
    SlngDeepgramNova3EnSttInitPayload:
      type: object
      required:
        - type
      properties:
        type:
          type: string
          const: init
        config:
          type: object
          description: Recognition configuration options
          properties:
            language:
              type: string
              description: Supported English language code.
              default: en
              enum:
                - en
                - en-au
                - en-us
                - en-nz
                - en-gb
                - en-in
            sample_rate:
              type: integer
              description: Input audio sample rate in Hz.
              default: 16000
            encoding:
              type: string
              description: Input audio encoding format.
              default: linear16
              enum:
                - linear16
                - flac
                - mulaw
                - amr-nb
                - amr-wb
                - opus
                - speex
                - mp3
                - mp4
                - webm
                - aac
                - ogg
            enable_partials:
              type: boolean
              description: Enable partial/interim transcription results.
              default: true
            punctuate:
              type: boolean
              description: Add punctuation and capitalization.
              default: false
            smart_format:
              type: boolean
              description: Apply formatting to improve readability (dates, times, numbers, etc.).
              default: false
            diarize:
              type: boolean
              description: Enable speaker diarization. Words assigned speaker numbers starting at 0.
              default: false
            numerals:
              type: boolean
              description: Convert spoken numbers to digits.
              default: false
            profanity_filter:
              type: boolean
              description: Filter profanity from transcript.
              default: false
            utterances:
              type: boolean
              description: Segment transcript into utterances.
              default: false
            paragraphs:
              type: boolean
              description: Add paragraph formatting.
              default: false
            filler_words:
              type: boolean
              description: Include filler words (uh, um) in transcript.
              default: false
            multichannel:
              type: boolean
              description: Enable multi-channel audio processing.
              default: false
            endpointing:
              type: integer
              minimum: 0
              default: 10
              description: Time in milliseconds of silence before finalizing speech. Set to 0 to disable endpointing entirely.
            utterance_end_ms:
              type: integer
              minimum: 200
              maximum: 5000
              default: 1000
              description: Time in milliseconds of silence between words before sending an UtteranceEnd message. Default is 1000ms, minimum 200ms, maximum 5000ms. Requires enable_partials to be true.
    SlngDeepgramNova3TeSttInitPayload:
      type: object
      required:
        - type
      properties:
        type:
          type: string
          const: init
        config:
          type: object
          description: Recognition configuration options
          properties:
            language:
              type: string
              description: Supported language codes for the Telugu variant.
              default: te
              enum:
                - te
                - en
            sample_rate:
              type: integer
              description: Input audio sample rate in Hz.
              default: 16000
            encoding:
              type: string
              description: Input audio encoding format.
              default: linear16
              enum:
                - linear16
                - flac
                - mulaw
                - amr-nb
                - amr-wb
                - opus
                - speex
                - mp3
                - mp4
                - webm
                - aac
                - ogg
            enable_partials:
              type: boolean
              description: Enable partial/interim transcription results.
              default: true
            punctuate:
              type: boolean
              description: Add punctuation and capitalization.
              default: false
            smart_format:
              type: boolean
              description: Apply formatting to improve readability (dates, times, numbers, etc.).
              default: false
            diarize:
              type: boolean
              description: Enable speaker diarization. Words assigned speaker numbers starting at 0.
              default: false
            numerals:
              type: boolean
              description: Convert spoken numbers to digits.
              default: false
            profanity_filter:
              type: boolean
              description: Filter profanity from transcript.
              default: false
            utterances:
              type: boolean
              description: Segment transcript into utterances.
              default: false
            paragraphs:
              type: boolean
              description: Add paragraph formatting.
              default: false
            filler_words:
              type: boolean
              description: Include filler words (uh, um) in transcript.
              default: false
            multichannel:
              type: boolean
              description: Enable multi-channel audio processing.
              default: false
            endpointing:
              type: integer
              minimum: 0
              default: 10
              description: Time in milliseconds of silence before finalizing speech. Set to 0 to disable endpointing entirely.
            utterance_end_ms:
              type: integer
              minimum: 200
              maximum: 5000
              default: 1000
              description: Time in milliseconds of silence between words before sending an UtteranceEnd message. Default is 1000ms, minimum 200ms, maximum 5000ms. Requires enable_partials to be true.
    SlngDeepgramNova3TaSttInitPayload:
      type: object
      required:
        - type
      properties:
        type:
          type: string
          const: init
        config:
          type: object
          description: Recognition configuration options
          properties:
            language:
              type: string
              description: Supported language codes for the Tamil variant.
              default: ta
              enum:
                - ta
                - en
            sample_rate:
              type: integer
              description: Input audio sample rate in Hz.
              default: 16000
            encoding:
              type: string
              description: Input audio encoding format.
              default: linear16
              enum:
                - linear16
                - flac
                - mulaw
                - amr-nb
                - amr-wb
                - opus
                - speex
                - mp3
                - mp4
                - webm
                - aac
                - ogg
            enable_partials:
              type: boolean
              description: Enable partial/interim transcription results.
              default: true
            punctuate:
              type: boolean
              description: Add punctuation and capitalization.
              default: false
            smart_format:
              type: boolean
              description: Apply formatting to improve readability (dates, times, numbers, etc.).
              default: false
            diarize:
              type: boolean
              description: Enable speaker diarization. Words assigned speaker numbers starting at 0.
              default: false
            numerals:
              type: boolean
              description: Convert spoken numbers to digits.
              default: false
            profanity_filter:
              type: boolean
              description: Filter profanity from transcript.
              default: false
            utterances:
              type: boolean
              description: Segment transcript into utterances.
              default: false
            paragraphs:
              type: boolean
              description: Add paragraph formatting.
              default: false
            filler_words:
              type: boolean
              description: Include filler words (uh, um) in transcript.
              default: false
            multichannel:
              type: boolean
              description: Enable multi-channel audio processing.
              default: false
            endpointing:
              type: integer
              minimum: 0
              default: 10
              description: Time in milliseconds of silence before finalizing speech. Set to 0 to disable endpointing entirely.
            utterance_end_ms:
              type: integer
              minimum: 200
              maximum: 5000
              default: 1000
              description: Time in milliseconds of silence between words before sending an UtteranceEnd message. Default is 1000ms, minimum 200ms, maximum 5000ms. Requires enable_partials to be true.
    SlngDeepgramNova3MrSttInitPayload:
      type: object
      required:
        - type
      properties:
        type:
          type: string
          const: init
        config:
          type: object
          description: Recognition configuration options
          properties:
            language:
              type: string
              description: Supported language codes for the Marathi variant.
              default: mr
              enum:
                - mr
                - en
            sample_rate:
              type: integer
              description: Input audio sample rate in Hz.
              default: 16000
            encoding:
              type: string
              description: Input audio encoding format.
              default: linear16
              enum:
                - linear16
                - flac
                - mulaw
                - amr-nb
                - amr-wb
                - opus
                - speex
                - mp3
                - mp4
                - webm
                - aac
                - ogg
            enable_partials:
              type: boolean
              description: Enable partial/interim transcription results.
              default: true
            punctuate:
              type: boolean
              description: Add punctuation and capitalization.
              default: false
            smart_format:
              type: boolean
              description: Apply formatting to improve readability (dates, times, numbers, etc.).
              default: false
            diarize:
              type: boolean
              description: Enable speaker diarization. Words assigned speaker numbers starting at 0.
              default: false
            numerals:
              type: boolean
              description: Convert spoken numbers to digits.
              default: false
            profanity_filter:
              type: boolean
              description: Filter profanity from transcript.
              default: false
            utterances:
              type: boolean
              description: Segment transcript into utterances.
              default: false
            paragraphs:
              type: boolean
              description: Add paragraph formatting.
              default: false
            filler_words:
              type: boolean
              description: Include filler words (uh, um) in transcript.
              default: false
            multichannel:
              type: boolean
              description: Enable multi-channel audio processing.
              default: false
            endpointing:
              type: integer
              minimum: 0
              default: 10
              description: Time in milliseconds of silence before finalizing speech. Set to 0 to disable endpointing entirely.
            utterance_end_ms:
              type: integer
              minimum: 200
              maximum: 5000
              default: 1000
              description: Time in milliseconds of silence between words before sending an UtteranceEnd message. Default is 1000ms, minimum 200ms, maximum 5000ms. Requires enable_partials to be true.
    SlngDeepgramNova3KnSttInitPayload:
      type: object
      required:
        - type
      properties:
        type:
          type: string
          const: init
        config:
          type: object
          description: Recognition configuration options
          properties:
            language:
              type: string
              description: Supported language codes for the Kannada variant.
              default: kn
              enum:
                - kn
                - en
            sample_rate:
              type: integer
              description: Input audio sample rate in Hz.
              default: 16000
            encoding:
              type: string
              description: Input audio encoding format.
              default: linear16
              enum:
                - linear16
                - flac
                - mulaw
                - amr-nb
                - amr-wb
                - opus
                - speex
                - mp3
                - mp4
                - webm
                - aac
                - ogg
            enable_partials:
              type: boolean
              description: Enable partial/interim transcription results.
              default: true
            punctuate:
              type: boolean
              description: Add punctuation and capitalization.
              default: false
            smart_format:
              type: boolean
              description: Apply formatting to improve readability (dates, times, numbers, etc.).
              default: false
            diarize:
              type: boolean
              description: Enable speaker diarization. Words assigned speaker numbers starting at 0.
              default: false
            numerals:
              type: boolean
              description: Convert spoken numbers to digits.
              default: false
            profanity_filter:
              type: boolean
              description: Filter profanity from transcript.
              default: false
            utterances:
              type: boolean
              description: Segment transcript into utterances.
              default: false
            paragraphs:
              type: boolean
              description: Add paragraph formatting.
              default: false
            filler_words:
              type: boolean
              description: Include filler words (uh, um) in transcript.
              default: false
            multichannel:
              type: boolean
              description: Enable multi-channel audio processing.
              default: false
            endpointing:
              type: integer
              minimum: 0
              default: 10
              description: Time in milliseconds of silence before finalizing speech. Set to 0 to disable endpointing entirely.
            utterance_end_ms:
              type: integer
              minimum: 200
              maximum: 5000
              default: 1000
              description: Time in milliseconds of silence between words before sending an UtteranceEnd message. Default is 1000ms, minimum 200ms, maximum 5000ms. Requires enable_partials to be true.
    WebsocketHeadersSlngWhisper:
      type: object
      properties:
        X-World-Part-Override:
          type: string
          description: "Target world part override. Auto-selected if not provided. Available world parts: `eu`."
          enum:
            - eu
    SlngWhisperSttInitPayload:
      type: object
      description: Initialize a Whisper STT session with recognition configuration before streaming audio.
      required:
        - type
      properties:
        type:
          type: string
          const: init
        config:
          type: object
          description: Whisper recognition configuration options. Features like VAD, partial transcripts, and language detection are enabled by default and reported in the ready response.
          properties:
            language:
              $ref: "#/components/schemas/WhisperLanguageCode"
            sample_rate:
              type: integer
              description: Input audio sample rate in Hz.
              default: 16000
            encoding:
              type: string
              description: Input audio encoding format.
              default: linear16
              enum:
                - linear16
                - mp3
                - opus
    WhisperLanguageCode:
      type: string
      description: ISO-639-1 language code. Auto-detected if not specified.
      example: en
      enum:
        - af
        - am
        - ar
        - as
        - az
        - ba
        - be
        - bg
        - bn
        - bo
        - br
        - bs
        - ca
        - cs
        - cy
        - da
        - de
        - el
        - en
        - es
        - et
        - eu
        - fa
        - fi
        - fo
        - fr
        - gl
        - gu
        - ha
        - haw
        - he
        - hi
        - hr
        - ht
        - hu
        - hy
        - id
        - is
        - it
        - ja
        - jw
        - ka
        - kk
        - km
        - kn
        - ko
        - la
        - lb
        - ln
        - lo
        - lt
        - lv
        - mg
        - mi
        - mk
        - ml
        - mn
        - mr
        - ms
        - mt
        - my
        - ne
        - nl
        - nn
        - no
        - oc
        - pa
        - pl
        - ps
        - pt
        - ro
        - ru
        - sa
        - sd
        - si
        - sk
        - sl
        - sn
        - so
        - sq
        - sr
        - su
        - sv
        - sw
        - ta
        - te
        - tg
        - th
        - tk
        - tl
        - tr
        - tt
        - uk
        - ur
        - uz
        - vi
        - yi
        - yo
        - zh
        - yue
  securitySchemes:
    bearer:
      type: http
      scheme: bearer
      description: |
        API key issued by SLNG. Pass as `Authorization: Bearer <token>` in the WebSocket upgrade request headers.