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io.github.capabilityhostprotocol/capabilities-txt-registry

by capabilityhostprotocol · remote · no sign-in to list tools · v0.1.0 · published by GitHub user capabilityhostprotocol

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

Read only
CompareRegistry entry

3 tools: 3 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

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

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

3 tools

Only reads 3Claude Code: allow
  • discover_capabilitiesSearch the capabilities.txt registry for sites that can do something — by capability id, keyword, or category.No findings

    Why it is in this group

    • The description's first verb is "search": a word for reading.
    Description, as the server wrote it
    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.
  • get_siteGet the full list of capabilities a site declares, by domain.No findings

    Why it is in this group

    • The name "get_site" says "get": a word for reading.
    Description, as the server wrote it
    Get the full list of capabilities a site declares, by domain.
  • list_sitesList every site that publishes a conformant capabilities.txt, with its grade and capability count.No findings

    Why it is in this group

    • The name "list_sites" says "list": a word for reading.
    Description, as the server wrote it
    List every site that publishes a conformant capabilities.txt, with its grade and capability count.

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 0.1.0. Values in angle brackets are yours to fill in.

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

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__capabilities-txt-registry__discover_capabilities",
      "mcp__capabilities-txt-registry__list_sites",
      "mcp__capabilities-txt-registry__get_site"
    ],
    "ask": [],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as capabilities-txt-registry. Review it before you use it.