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Library Of Congress

Official registry Other

Library of Congress (loc.gov) MCP — the world's largest library.

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http library-of-congress 'https://gateway.pipeworx.io/library-of-congress/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "library-of-congress": {
            "type": "http",
            "url": "https://gateway.pipeworx.io/library-of-congress/mcp"
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. mcp-library-of-congress
  2. Tools
  3. Quick Start
  4. Using with ask_pipeworx
  5. More
  6. License
  7. No MCP client? Call it over HTTP

mcp-library-of-congress

Library of Congress (loc.gov) MCP — the world's largest library.

Part of Pipeworx — an MCP gateway connecting AI agents to 965+ live data sources.

Tools

ToolDescription

Quick Start

Add to your MCP client (Claude Desktop, Cursor, Windsurf, etc.):

{
  "mcpServers": {
    "library-of-congress": {
      "url": "https://gateway.pipeworx.io/library-of-congress/mcp"
    }
  }
}

Or connect to the full Pipeworx gateway for access to all 965+ data sources:

{
  "mcpServers": {
    "pipeworx": {
      "url": "https://gateway.pipeworx.io/mcp"
    }
  }
}

Using with ask_pipeworx

Instead of calling tools directly, you can ask questions in plain English:

ask_pipeworx({ question: "your question about Library Of Congress data" })

The gateway picks the right tool and fills the arguments automatically.

More

License

MIT

No MCP client? Call it over HTTP

curl -X POST https://gateway.pipeworx.io/v1/tools/search \
  -H 'Content-Type: application/json' \
  -d '{"query":"Civil War photographs"}'

No account needed for the first calls. Inspect any tool: GET https://gateway.pipeworx.io/v1/tools/search. Find one: POST https://gateway.pipeworx.io/v1/tools/search_packs with {"query":"..."}.

Frequently asked questions

What is Library Of Congress?

Library of Congress (loc.gov) MCP — the world's largest library.

How do I install Library Of Congress?

It runs as a remote server. In Claude Code: claude mcp add --transport http library-of-congress 'https://gateway.pipeworx.io/library-of-congress/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Library Of Congress need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is Library Of Congress open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains Library Of Congress?

It is published by pipeworx-io. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.