The Callin API lets you programmatically integrate AI voice agents into your product. Use it to create and configure agents, manage their knowledge bases, trigger calls, and retrieve call logs and transcripts — all over a simple REST interface. Base URLDocumentation Index
Fetch the complete documentation index at: https://support.callin.io/llms.txt
Use this file to discover all available pages before exploring further.
/public, for example:
Authentication
All endpoints (except the health check) require an API key. You can find yours in Profile → API Key on the Callin dashboard. Pass it in either of these ways: HeaderRegenerating your API key — You can regenerate your key from the same Profile → API Key section. Note that regenerating immediately invalidates your previous key, so make sure to update it everywhere it’s in use before regenerating.
The health check endpoint GET /public/health is unauthenticated and can be used to verify connectivity.
Response format
All responses are JSON and follow a consistent envelope:| Field | Description |
|---|---|
success | true or false |
data | The returned resource or result |
error | Error message if success is false |
pagination | Present on list endpoints |
Try it interactively
Every endpoint page includes an API playground. Select a server, add your API key, and fire live requests directly from the docs — no separate tool needed.What you can build
- AI voice agents — create, update, and manage agents and their behavior
- Knowledge bases — upload and manage the content your agents use during calls
- Call logs & transcripts — retrieve records and transcripts for every call