Documentation Index
Fetch the complete documentation index at: https://developers.telnyx.com/llms.txt
Use this file to discover all available pages before exploring further.
1. Choose your interface
WebSocket Streaming
Real-time streaming. Send text, receive audio chunks as they’re synthesized.
REST API
HTTP POST. Get audio back as binary, base64, or async URL. OpenAI SDK compatible.
In-Call Playback
TTS during live calls via Call Control
speak or TeXML <Say>.2. Choose a pre-built voice
Telnyx
Natural, NaturalHD, Ultra, Kokoro, Qwen3TTS, xAI Grok.
Third-Party Providers
AWS Polly, Azure, ElevenLabs, Minimax, MurfAI, Rime, Resemble, Inworld.
3. Or create your own
Voice Design Lab
Clone and design custom voices. Available on select providers: Qwen3TTS, Minimax, ElevenLabs, Resemble.