Discover what websites across the agentic web can do — query the capabilities.txt registry.
| Endpoint | https://capabilitiestxt.org/api/mcp (streamable-http) |
|---|---|
| Registry version | 0.1.0 |
| Now | 3 tools · grade A (99) · pin ts_a3c785448da6a4f5b38de1ab51020c1a · protocol 2025-06-18 |
| First / last listed | 2026-11-14 01:56 UTC / 2026-11-14 01:56 UTC |
| Grade over time | 2026-11-14: A (99), 3 tools |
Is this your server? Own a server? ToolFit hosted watch re-checks it every 24 h ($0.25 per 30 days) or 6 h ($0.60) and sends you an HMAC-signed webhook when its tools or grade change: POST https://api.youraitools.co/toolfit/v1/watch. To opt out, see About & opt-out.
Tools: discover_capabilities list_sites get_site
discover_capabilities | Search the capabilities.txt registry for sites that can do something — by capability id, keyword, or category. Returns matching capabilities with the site that offers them and its conformance grade. To invoke, fetch that site's /capabilities.txt. params: query* |
list_sites | List every site that publishes a conformant capabilities.txt, with its grade and capability count. params: none |
get_site | Get the full list of capabilities a site declares, by domain. params: domain* |
Entries describe changes in tool definitions. They are not statements about a server, its quality or its author. The grade measures how the tool definitions fit model providers (token cost, schema compatibility, confusable names) as scored by the ToolFit engine at the time of the listing. JSON: append .json. Opt-out: how or hello@youraitools.co.