DEVELOPERS
Telnyx developer directory
Direct entry points for credentials, API documentation, quickstarts, sandbox testing, SDKs, and tools for AI agents.
Start and authenticate
Create an account and issue a V2 API key for authenticated requests.
- Create an account
Open a Telnyx account before adding funds for production use.
- Create or manage API keys
Open the Mission Control Portal API Keys page to create, copy, or revoke credentials.
- API-key setup guide
Learn how to send a V2 key as a Bearer token to api.telnyx.com.
- Programmatic agent signup
Machine-readable onboarding for agents that cannot use the browser portal.
Documentation and quickstarts
Start from the API reference or follow a product-specific quickstart with executable examples.
- Developer documentation
Browse product guides, concepts, and integration tutorials.
- API reference
Explore Telnyx REST resources, request fields, and responses.
- Agent SDK quickstart
Build and run a Telnyx real-time voice agent.
- Verify quickstart
Send and validate one-time verification codes.
- Edge Compute quickstart
Deploy a function on the Telnyx edge network.
- Machine-readable getting started guide
Follow curl-first steps for SMS, Voice API, Voice AI, and pay-per-call inference.
Test without an API key
Use rate-limited demo endpoints to evaluate common Telnyx capabilities before creating credentials. Demo restrictions apply.
- POST /api/demo/send-sms
Send an SMS to supported test numbers without an API key.
- POST /api/inference
Run a rate-limited AI chat completion through Telnyx.
- POST /api/tts-demo
Generate a text-to-speech sample with no client credential.
- POST /api/stt-demo
Transcribe a supported audio sample with no client credential.
- Agent fast path
Discover evaluation commands, authentication methods, and agent-ready endpoints as JSON or Markdown.
- x402 pay-per-call inference
Use USDC payment authorization for inference without signup or an API key.
SDKs and agent tooling
Install an official SDK or connect an AI coding agent through Telnyx skills, plugins, MCP, and OpenAPI.
- Node.js SDK on npm
Install the official Telnyx JavaScript and TypeScript SDK.
- Python SDK on PyPI
Install the official Telnyx Python SDK.
- Telnyx agent skills and plugins
Use AGENTS.md, Cursor, Claude, Windsurf, Gemini, and generic plugin manifests from the public repository.
- MCP server card
Discover the Telnyx MCP server, authentication, and tools.
- Agent skills index
Enumerate machine-readable Telnyx agent skills.
- OpenAPI document
Load the public Telnyx API contract as JSON.
