# capabilities.txt

> The open convention for a website to declare what it can do — the capabilities an agent can discover and invoke — at /capabilities.txt. A discovery sibling to robots.txt and llms.txt, for the agentic web.

## Start here
- [The proposal, format, FAQ](https://capabilitiestxt.org): background, the format, examples, and how agents consume it.
- [Specification](https://github.com/capabilityhostprotocol/capabilities-txt/blob/main/README.md): the full spec (the README is the spec).

## Examples
- [Live reference](https://capabilitiestxt.org/examples/capabilityhostprotocol.com.txt): a real, published capabilities.txt.
- [E-commerce](https://capabilitiestxt.org/examples/illustrative/shop.example.txt) · [Customer support](https://capabilitiestxt.org/examples/illustrative/support.example.txt) · [Banking](https://capabilitiestxt.org/examples/illustrative/bank.example.txt) · [Healthcare](https://capabilitiestxt.org/examples/illustrative/clinic.example.txt) · [Developer platform](https://capabilitiestxt.org/examples/illustrative/cloud.example.txt)

## Registry & discovery (for agents)
- [The capability map](https://capabilitiestxt.org/map): search capabilities across every registered site — who can do what.
- [/api/discover](https://capabilitiestxt.org/api/discover): GET ?q=<keyword> — agent-queryable discovery over the whole registry (JSON, CORS-open).
- [Registry MCP server](https://capabilitiestxt.org/api/mcp): connect over MCP to discover_capabilities, list_sites, get_site across the indexed web.
- [Directory](https://capabilitiestxt.org/directory): browse listed sites · [check a file](https://capabilitiestxt.org/submit) · [implement one](https://capabilitiestxt.org/implement).

## Tools
- [Validator, OpenAPI generator, resolver, and MCP server](https://github.com/capabilityhostprotocol/capabilities-txt/tree/main/tools)

## Where this goes next
- [Capability Host Protocol](https://capabilityhostprotocol.com): the invocation, governance, and evidence that come after discovery.