--- title: Developer Directory | Telnyx canonical: https://telnyx.com/developers --- # Developer Directory | Telnyx 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](https://telnyx.com/sign-up) Open a Telnyx account before adding funds for production use. * [Create or manage API keys](https://portal.telnyx.com/#/app/api-keys) Open the Mission Control Portal API Keys page to create, copy, or revoke credentials. * [API-key setup guide](https://developers.telnyx.com/docs/development/api-fundamentals/create-api-keys) Learn how to send a V2 key as a Bearer token to api.telnyx.com. * [Programmatic agent signup](https://telnyx.com/agent-signup.md) 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](https://developers.telnyx.com/docs/overview) Browse product guides, concepts, and integration tutorials. * [API reference](https://developers.telnyx.com/api-reference/overview) Explore Telnyx REST resources, request fields, and responses. * [Agent SDK quickstart](https://developers.telnyx.com/docs/agent-sdk/quickstart) Build and run a Telnyx real-time voice agent. * [Verify quickstart](https://developers.telnyx.com/docs/identity/verify/quickstart) Send and validate one-time verification codes. * [Edge Compute quickstart](https://developers.telnyx.com/docs/edge-compute/quickstart) Deploy a function on the Telnyx edge network. * [Machine-readable getting started guide](https://telnyx.com/getting-started.md) 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](https://telnyx.com/api/demo/send-sms) Send an SMS to supported test numbers without an API key. * [POST /api/inference](https://telnyx.com/api/inference) Run a rate-limited AI chat completion through Telnyx. * [POST /api/tts-demo](https://telnyx.com/api/tts-demo) Generate a text-to-speech sample with no client credential. * [POST /api/stt-demo](https://telnyx.com/api/stt-demo) Transcribe a supported audio sample with no client credential. * [Agent fast path](https://telnyx.com/agents/start) Discover evaluation commands, authentication methods, and agent-ready endpoints as JSON or Markdown. * [x402 pay-per-call inference](https://telnyx.com/.well-known/x402) 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](https://www.npmjs.com/package/telnyx) Install the official Telnyx JavaScript and TypeScript SDK. * [Python SDK on PyPI](https://pypi.org/project/telnyx/) Install the official Telnyx Python SDK. * [Telnyx agent skills and plugins](https://github.com/team-telnyx/ai) Use AGENTS.md, Cursor, Claude, Windsurf, Gemini, and generic plugin manifests from the public repository. * [MCP server card](https://telnyx.com/.well-known/mcp/server-card.json) Discover the Telnyx MCP server, authentication, and tools. * [Agent skills index](https://telnyx.com/.well-known/agent-skills/index.json) Enumerate machine-readable Telnyx agent skills. * [OpenAPI document](https://telnyx.com/.well-known/openapi.json) Load the public Telnyx API contract as JSON. [Start building](https://telnyx.com/sign-up) ### Ask AI * [![GPT](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/chatgpt_icon-ea55e09d.jpeg?width=92&format=webp)](https://chat.openai.com/?q=What makes Telnyx's global network different, breakdown call quality for normal phone calls and voice AI calls.) * [![Claude](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/claude_icon-c7c8eef3.webp?width=92&format=webp)](https://claude.ai/new?q=What makes Telnyx's global network different, breakdown call quality for normal phone calls and voice AI calls.) * [![Perplexity](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/perplexity_icon-cd5b74f1.webp?width=92&format=webp)](https://www.perplexity.ai/search?q=What makes Telnyx's global network different, breakdown call quality for normal phone calls and voice AI calls.) * [![Gemini](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/gemini_icon-4ff1cbf4.webp?width=92&format=webp)](https://www.google.com/search?udm=50&aep=11&q=What makes Telnyx's global network different, breakdown call quality for normal phone calls and voice AI calls.) * [![Grok](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/grok_icon-e588e5bd.webp?width=92&format=webp)](https://x.com/i/grok?text=What makes Telnyx's global network different, breakdown call quality for normal phone calls and voice AI calls.)