Capabilities Txt Registry MCP server

Capabilities Txt Registry is an MCP server with 3 tools an agent can call, among them discover_capabilities, get_site, list_sites. It answers at https://capabilitiestxt.org/api/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 11 September 2026; the last check, on 21 October 2026, succeeded.

Discover what websites across the agentic web can do — query the capabilities.txt registry.

Description as the publisher wrote it.

The 3 tools Capabilities Txt Registry offers

Add Capabilities Txt Registry to your AI client

Every block below points at https://capabilitiestxt.org/api/mcp. Pick your client and copy.

claude mcp add --transport http capabilities-txt-registry https://capabilitiestxt.org/api/mcp

{
  "mcpServers": {
    "capabilities-txt-registry": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://capabilitiestxt.org/api/mcp"]
    }
  }
}

{
  "mcpServers": {
    "capabilities-txt-registry": {
      "url": "https://capabilitiestxt.org/api/mcp"
    }
  }
}

{
  "servers": {
    "capabilities-txt-registry": {
      "type": "http",
      "url": "https://capabilitiestxt.org/api/mcp"
    }
  }
}

{
  "context_servers": {
    "capabilities-txt-registry": {
      "url": "https://capabilitiestxt.org/api/mcp"
    }
  }
}

{
  "mcpServers": {
    "capabilities-txt-registry": {
      "serverUrl": "https://capabilitiestxt.org/api/mcp"
    }
  }
}

{
  "mcpServers": {
    "capabilities-txt-registry": {
      "url": "https://capabilitiestxt.org/api/mcp"
    }
  }
}

name: Capabilities Txt Registry
version: 0.0.1
schema: v1
mcpServers:
  - name: Capabilities Txt Registry
    type: streamable-http
    url: https://capabilitiestxt.org/api/mcp

{
  "mcpServers": {
    "capabilities-txt-registry": {
      "httpUrl": "https://capabilitiestxt.org/api/mcp"
    }
  }
}

{
  "mcpServers": {
    "capabilities-txt-registry": {
      "type": "http",
      "url": "https://capabilitiestxt.org/api/mcp"
    }
  }
}

{
  "mcpServers": {
    "capabilities-txt-registry": {
      "url": "https://capabilitiestxt.org/api/mcp"
    }
  }
}

goose://extension?url=https%3A%2F%2Fcapabilitiestxt.org%2Fapi%2Fmcp&type=streamable_http&id=capabilities-txt-registry&name=Capabilities%20Txt%20Registry

Is Capabilities Txt Registry up right now?

It answered our last check on 21 October 2026 in 835 ms. Over 6 checks since 11 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.

MCP servers similar to Capabilities Txt Registry

Questions about Capabilities Txt Registry

How many tools does Capabilities Txt Registry have?

3, as returned by the server's own tools/list on 13 September 2026: discover_capabilities, get_site, list_sites.

Is Capabilities Txt Registry down?

It answered our last check on 21 October 2026 in 835 ms. Over 6 checks since 11 September 2026 it answered 6.

How do I add Capabilities Txt Registry to Cursor?

Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://capabilitiestxt.org/api/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.

Does Capabilities Txt Registry need an API key?

It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.

Where this comes from

Publisher: io.github.capabilityhostprotocol. Endpoint host: capabilitiestxt.org. ARD identifier: urn:air:io.github.capabilityhostprotocol:mcp:capabilities-txt-registry. First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page is inferred from its name. Ranking in Neuronto search is never for sale.