US Code of Federal Regulations

io.github.mccallar/cfr-mcp

Look up, search, and track changes to the US Code of Federal Regulations (eCFR).

Connect this server

Add this to your MCP client config — claude_desktop_config.json (Claude Desktop) or .cursor/mcp.json (Cursor).Suits: Claude Desktop · Cursor.

{
  "mcpServers": {
    "cfr-mcp": {
      "command": "uvx",
      "args": [
        "cfr-mcp"
      ]
    }
  }
}

A starting point — check the repository for exact arguments and setup. Restart your client after editing the config.

Category: Developer Tools
Version: 0.2.2
Registry: active
Published: 8/29/2026

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HTML — for your website

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Recommended. A dofollow link from your own domain is the one that counts for search engines, and it's the link we check for a free listing.

Markdown — for your README

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Nice for visibility, but GitHub marks README links nofollow, so it doesn't pass authority. Use the HTML badge on your site as well.