# Telnyx Voice

> Programmable voice and voice AI agent infrastructure on a carrier-owned
> global network. Single-vendor stack: SIP + STT + LLM inference + TTS.
> Base URL: https://api.telnyx.com/v2

## What this surface is for
- Outbound and inbound calling, call control, recording, conferencing
- Voice AI agents bundled with STT, LLM, and TTS at the telco edge
- WebRTC, programmable IVR, voice notifications, and verification

## Pricing (headline rates)
- Programmable voice: $0.002/min platform fee (additive on SIP)
- Voice AI agent (bundled SIP + STT + LLM + TTS): $0.05/min
- TTS: from $0.000003 per character (Telnyx); HD voices $0.000048/char
- STT: $0.015/min (Telnyx, Deepgram); $0.017/min (Google, Azure)
- Full pricing markdown: https://telnyx.com/pricing.md
- Pricing JSON: https://telnyx.com/ai/pricing.json

## Canonical docs and specs
- Voice API reference: https://developers.telnyx.com/api/call-control
- WebRTC docs: https://developers.telnyx.com/docs/voice/webrtc
- Voice AI agents: https://developers.telnyx.com/docs/inference/ai-assistants
- OpenAPI discovery: https://telnyx.com/.well-known/openapi.json
- API catalog: https://telnyx.com/.well-known/api-catalog

## Capabilities and structural claims
- Capabilities index: https://telnyx.com/ai/capabilities.json
- STIR/SHAKEN attestation level: A (verify at /ai/compliance.json)
- Inter-provider hops: 0 on Telnyx-owned routes
- Single-vendor voice AI: SIP + STT + LLM + TTS in one platform

## Authentication
- Bearer API key in the Authorization header.
- Get a key via the agent signup flow: https://telnyx.com/agent-signup.md
- OAuth 2.0 metadata: https://telnyx.com/.well-known/oauth-authorization-server

## Agent fast path
- Agent entry point: https://telnyx.com/agents/start
- Site-wide index: https://telnyx.com/llms.txt
- AI namespace index: https://telnyx.com/ai/llms.txt
- Getting started for agents: https://telnyx.com/getting-started.md