Retell AI API Reference - Retell AI

Use this section to build and manage Retell AI voice and chat agents programmatically.

What you can do

Create, update, and manage calls and chats
Configure voice agents and chat agents
Manage phone numbers, voices, and knowledge bases
Run tests and retrieve test run results
Integrate custom telephony and custom LLM workflows

Getting started

If you are new to the API:

Create your API key in the dashboard.
Make your first request with the Create phone call endpoint.
Use the grouped endpoint sections in the sidebar to expand your integration.

Create Phone Call

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