Equibles gives your tools structured financial data for US-listed companies — SEC filings, institutional holdings, insider & congressional trades, short data, fundamentals, and earnings-call intelligence. There are two ways to connect, and both are free to start. Pick one:

- [MCP server](/docs/mcp) — Connect ChatGPT, Claude, Cursor, or any MCP client and let your agent query live data in the conversation — no glue code. Start here if you're wiring up an AI agent.
- [REST API](/docs/api) — Standard JSON over HTTPS at api.equibles.com/v1. Authenticate with an API key and page through the endpoints. Start here for scripts, backends, and dashboards.

Not sure which fits? See [MCP vs REST](/docs/mcp-vs-rest) for a side-by-side comparison. Both share one API key and one daily limit.

## Start building

1. **Create an API key** — it starts with `eq_` and is shown once (see [Authentication](/docs/authentication)). ChatGPT and Claude web can connect over OAuth with no key at all.
2. **Pick your path** — connect an AI agent over MCP, or make your first REST call. The [Quickstart](/docs/quickstart) walks through both in a few minutes.

## Explore

- [Authentication](/docs/authentication) — create keys, delivery methods, and OAuth.
- [Connect the MCP server](/docs/mcp) — get any MCP client running in minutes.
- [MCP tool reference](/docs/mcp/tools) — every tool your agent can call, with a real example each.
- [REST API](/docs/api) — base URL, pagination, and the response envelope.
- [Endpoint reference](/docs/api/endpoints) — every REST endpoint, grouped, with a worked example each.
- [Recipes](/docs/recipes) — multi-tool workflows for common jobs.
- [Rate limits & errors](/docs/rate-limits) — daily limits, headers, and error codes.
- [Data coverage](/docs/data) — every dataset and where it comes from.
- [Data methodology](/docs/methodology) — sourcing, verification, and how figures are handled.
- [Changelog](/docs/changelog) — what's new, newest first.

## Built for AI agents

Every page here is available as clean Markdown for LLMs and coding assistants — open any page's **Open as Markdown** menu to copy it, or pull the whole set from [llms.txt](/docs/llms.txt) (a linked index) and [llms-full.txt](/docs/llms-full.txt) (the entire docs in one file).