> For the complete documentation index, see [llms.txt](https://refkit.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://refkit.gitbook.io/docs/reference.md).

# Reference

Technical details for applications and coding agents.

* [API essentials](/docs/reference/api-essentials.md): base URL, authentication, modes, errors, and pagination.
* [REST API](/docs/reference/rest-api.md): core public endpoint groups.
* [SDK, CLI, and MCP](/docs/reference/sdk-cli-mcp.md): optional wrappers around the REST API.