> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://developer.jelliu.co/api-reference/calls/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://developer.jelliu.co/_mcp/server.

# Calls

> Build on Jelliu's AI voice and omnichannel agents — REST API, webhooks and MCP.


## API Docs

- Calls [List calls](https://developer.jelliu.co/api-reference/calls/get-calls.md)
- Calls [Create a call](https://developer.jelliu.co/api-reference/calls/post-calls.md)
- Calls [Live call concurrency](https://developer.jelliu.co/api-reference/calls/get-calls-concurrency.md)
- Calls [Retrieve a call](https://developer.jelliu.co/api-reference/calls/get-calls-by-call-id.md)
- Calls [Retrieve a call recording](https://developer.jelliu.co/api-reference/calls/get-calls-by-call-id-audio.md)
- Calls [Hang up a call](https://developer.jelliu.co/api-reference/calls/post-calls-by-call-id-hangup.md)
- Calls [Start a warm transfer](https://developer.jelliu.co/api-reference/calls/post-calls-by-call-id-transfer.md)
- Calls [Complete a warm transfer](https://developer.jelliu.co/api-reference/calls/post-calls-by-call-id-transfer-complete.md)
- Calls [Cancel a warm transfer](https://developer.jelliu.co/api-reference/calls/post-calls-by-call-id-transfer-cancel.md)

## OpenAPI Specification

The raw OpenAPI 3.1 specification for this API is available at:
- [OpenAPI JSON](https://developer.jelliu.co/openapi.json)
- [OpenAPI YAML](https://developer.jelliu.co/openapi.yaml)