> ## Documentation Index
> Fetch the complete documentation index at: https://docs.btca.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# API Reference

> Local server and cloud APIs for btca

btca exposes two HTTP surfaces:

* **Local server API**: runs on your machine, no authentication required.
* **Cloud API**: hosted services that require a Bearer API key.

Use the navigation to browse endpoints. Each page is backed by OpenAPI and
includes live schemas.

## Authentication

* Local server: no auth.
* Cloud API: `Authorization: Bearer <apiKey>`.