SLNG Text-to-Speech API

Eleven Flash v2

Endpointhttps://api.slng.ai

Ultra-low latency TTS with industry-leading speed

eleven-flash:2 - websocket

GET

https://api.slng.ai

/v1/tts/elevenlabs/eleven-flash:2

Text-to-Speech API for generating speech from text using ElevenLabs eleven-flash. Ultra-low latency TTS with industry-leading speed

WebSocket Endpoint

Establishes a WebSocket connection for real-time text-to-speech.

Connection URL: wss://api.slng.ai/v1/tts/elevenlabs/eleven-flash:2

eleven-flash:2 - websocket › Headers

Authorization

string · required

The Authorization header is used to authenticate with the API using your API key. Value is of the format Bearer YOUR_KEY_HERE.

Upgrade

string · enum · required

Enum values:

websocket

Connection

string · enum · required

Enum values:

Upgrade

X-Region-Override

string · enum

Optional. Specify a target region for this model. If not provided, the system will automatically select an appropriate region.

Enum values:

eu-west

eu-west-1

eleven-flash:2 - websocket › Request Body

oneOf

Exactly one variant must match.

Decision Table

Variant	Matching Criteria
	type = object · requires: type, voice
	type = object · requires: type, text
	type = object · requires: type

Properties for Init Message:

type

const · required

Const value: init

voice

string · required

Default: pNInz6obpgDQGcFmaJgB

model_id

string

Default: eleven_flash_v2_5

object

eleven-flash:2 - websocket › Responses

Switching Protocols

oneOf

Exactly one variant must match.

Decision Table

Variant	Matching Criteria
	type = object · requires: type, session_id
	type = object · requires: type, data
	type = object · requires: type, segment_id
	type = object · requires: type, segment_id
	type = object · requires: type
	type = object · requires: type
	type = object · requires: type
	type = object · requires: type, code, message

Properties for Ready Message:

Indicates the session is ready to receive messages.

type

const · required

Const value: ready

session_id

string · required

Unique session identifier

GET/v1/tts/elevenlabs/eleven-flash:2

curl --request GET \
  --url https://api.slng.ai/v1/tts/elevenlabs/eleven-flash:2 \
  --header 'Authorization: <string>' \
  --header 'Connection: <string>' \
  --header 'Content-Type: application/json' \
  --header 'Upgrade: <string>' \
  --data '
{
  "type": "init",
  "voice": "pNInz6obpgDQGcFmaJgB",
  "model_id": "eleven_flash_v2_5",
  "config": {
    "encoding": "mp3"
  }
}
'

shell

Example Request Body

{
  "type": "init",
  "voice": "pNInz6obpgDQGcFmaJgB",
  "model_id": "eleven_flash_v2_5",
  "config": {
    "encoding": "mp3"
  }
}

json

application/json

Example Responses

{
  "type": "ready",
  "session_id": "session_123"
}

json

application/json

eleven-flash:2 - http

POST

https://api.slng.ai

/v1/tts/elevenlabs/eleven-flash:2

Text-to-Speech API for generating speech from text using ElevenLabs eleven-flash. Ultra-low latency TTS with industry-leading speed

eleven-flash:2 - http › Headers

Authorization

string · required

The Authorization header is used to authenticate with the API using your API key. Value is of the format Bearer YOUR_KEY_HERE.

X-Region-Override

string · enum

Optional. Specify a target region for this model. If not provided, the system will automatically select an appropriate region.

Enum values:

eu-west

eu-west-1

eleven-flash:2 - http › Request Body

text

string · required

The text that will get converted into speech.

voice

string

ID of the voice to be used.

Default: pNInz6obpgDQGcFmaJgB

model_id

string

Identifier of the model that will be used.

Default: eleven_flash_v2_5

language_code

string

Language code (ISO 639-1) used to enforce a language for the model and text normalization.

Default: en

object

Voice settings overriding stored settings for the given voice.

output_format

string · enum

Enum values:

mp3_22050_32

mp3_44100_32

mp3_44100_64

mp3_44100_96

mp3_44100_128

mp3_44100_192

pcm_16000

pcm_22050

Default: mp3_44100_128

eleven-flash:2 - http › Responses

Successful synthesis

string · binary

Audio file content

POST/v1/tts/elevenlabs/eleven-flash:2

curl --request POST \
  --url https://api.slng.ai/v1/tts/elevenlabs/eleven-flash:2 \
  --header 'Authorization: <string>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "text": "Hello, this is a test of text to speech synthesis.",
  "voice": "pNInz6obpgDQGcFmaJgB",
  "model_id": "eleven_flash_v2"
}
'

shell

Example Request Body

{
  "text": "Hello, this is a test of text to speech synthesis.",
  "voice": "pNInz6obpgDQGcFmaJgB",
  "model_id": "eleven_flash_v2"
}

json

application/json

Example Responses

<binary>

plain

audio/*

Aura 2 Eleven Flash v2.5

eleven-flash:2 - websocket

GET

https://api.slng.ai

/v1/tts/elevenlabs/eleven-flash:2

Text-to-Speech API for generating speech from text using ElevenLabs eleven-flash. Ultra-low latency TTS with industry-leading speed

WebSocket Endpoint

Establishes a WebSocket connection for real-time text-to-speech.

Connection URL: wss://api.slng.ai/v1/tts/elevenlabs/eleven-flash:2

eleven-flash:2 - websocket › Headers

Authorization

string · required

The Authorization header is used to authenticate with the API using your API key. Value is of the format Bearer YOUR_KEY_HERE.

Upgrade

string · enum · required

Enum values:

websocket

Connection

string · enum · required

Enum values:

Upgrade

X-Region-Override

string · enum

Optional. Specify a target region for this model. If not provided, the system will automatically select an appropriate region.

Enum values:

eu-west

eu-west-1

eleven-flash:2 - websocket › Request Body

oneOf

Exactly one variant must match.

Decision Table

Variant	Matching Criteria
	type = object · requires: type, voice
	type = object · requires: type, text
	type = object · requires: type

Properties for Init Message:

type

const · required

Const value: init

voice

string · required

Default: pNInz6obpgDQGcFmaJgB

model_id

string

Default: eleven_flash_v2_5

object

eleven-flash:2 - websocket › Responses

Switching Protocols

oneOf

Exactly one variant must match.

Decision Table

Variant	Matching Criteria
	type = object · requires: type, session_id
	type = object · requires: type, data
	type = object · requires: type, segment_id
	type = object · requires: type, segment_id
	type = object · requires: type
	type = object · requires: type
	type = object · requires: type
	type = object · requires: type, code, message

Properties for Ready Message:

Indicates the session is ready to receive messages.

type

const · required

Const value: ready

session_id

string · required

Unique session identifier

curl --request GET \ --url https://api.slng.ai/v1/tts/elevenlabs/eleven-flash:2 \ --header 'Authorization: <string>' \ --header 'Connection: <string>' \ --header 'Content-Type: application/json' \ --header 'Upgrade: <string>' \ --data ' { "type": "init", "voice": "pNInz6obpgDQGcFmaJgB", "model_id": "eleven_flash_v2_5", "config": { "encoding": "mp3" } } '

eleven-flash:2 - http

POST

https://api.slng.ai

/v1/tts/elevenlabs/eleven-flash:2

Text-to-Speech API for generating speech from text using ElevenLabs eleven-flash. Ultra-low latency TTS with industry-leading speed

eleven-flash:2 - http › Headers

Authorization

string · required

The Authorization header is used to authenticate with the API using your API key. Value is of the format Bearer YOUR_KEY_HERE.

X-Region-Override

string · enum

Optional. Specify a target region for this model. If not provided, the system will automatically select an appropriate region.

Enum values:

eu-west

eu-west-1

eleven-flash:2 - http › Request Body

text

string · required

The text that will get converted into speech.

voice

string

ID of the voice to be used.

Default: pNInz6obpgDQGcFmaJgB

model_id

string

Identifier of the model that will be used.

Default: eleven_flash_v2_5

language_code

string

Language code (ISO 639-1) used to enforce a language for the model and text normalization.

Default: en

object

Voice settings overriding stored settings for the given voice.

output_format

string · enum

Enum values:

mp3_22050_32

mp3_44100_32

mp3_44100_64

mp3_44100_96

mp3_44100_128

mp3_44100_192

pcm_16000

pcm_22050

Default: mp3_44100_128

eleven-flash:2 - http › Responses

Successful synthesis

string · binary

Audio file content