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Every SLNG endpoint, grouped by capability. Pick a section to see request and response details, or start with the Unified API to reach any provider through one request shape.

Unified API

One request shape for every STT and TTS model. Swap providers by changing the URL. Includes parameter coverage and supported models.

Text-to-Speech

Per-provider TTS endpoints over HTTP and WebSocket, plus pronunciation dictionaries.

Speech-to-Text

Per-provider STT endpoints for file transcription and real-time streaming.

Voice Agents

Create, configure, and dispatch SLNG voice agents, including outbound calls.
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Batch

Submit and manage large transcription and synthesis jobs asynchronously.

Bridges

Connect Cognigy and Jambonz voice platforms to SLNG STT and TTS.