How do I install libofcongress-mcp-server?

Pick a client above and copy the generated config. Cursor and VS Code also have a deep link when the server can run locally or remotely.

Is libofcongress-mcp-server official?

No. Registry-listed is not the same as vendor-official. Read the methodology for the difference.

How is the trust score calculated?

This listing scores 37 (Limited). The formula is published on the methodology page.

MCPpedia

libofcongress-mcp-server MCP Server

Name: libofcongress-mcp-server MCP Server
Author: cyanheads

Search LOC digital collections, Chronicling America newspapers (full OCR), and LC Subject Headings.

Tools Versions Alternatives

RegistryRemotecyanheads

37Limited

Install

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "cyanheads-libofcongress-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/libofcongress-mcp-server@0.5.1"
      ],
      "env": {
        "LOC_USER_AGENT": "libofcongress-mcp-server/0.5.1",
        "LOC_REQUEST_DELAY_MS": "3100",
        "MCP_LOG_LEVEL": "info",
        "MCP_SESSION_MODE": "stateless"
      }
    }
  }
}

Install guide

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libofcongress-mcp-server MCP Server | MCPpedia

Environment

Name	Required	Notes
LOC_USER_AGENT	No	User-Agent header sent with LOC API requests. LOC recommends a descriptive value for polite access.
LOC_REQUEST_DELAY_MS	No	Delay in milliseconds between LOC API requests to stay under the 20 req/min rate limit.
MCP_LOG_LEVEL	No	Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').
MCP_SESSION_MODE	No	HTTP session mode: auto, stateful, or stateless.
MCP_TRANSPORT_TYPE	No	Selects the HTTP transport.
LOC_USER_AGENT	No	User-Agent header sent with LOC API requests. LOC recommends a descriptive value for polite access.
LOC_REQUEST_DELAY_MS	No	Delay in milliseconds between LOC API requests to stay under the 20 req/min rate limit.
MCP_HTTP_HOST	No	The hostname for the HTTP server.
MCP_HTTP_PORT	No	The port to run the HTTP server on.
MCP_HTTP_ENDPOINT_PATH	No	The endpoint path for the MCP server.
MCP_AUTH_MODE	No	Authentication mode to use: 'none', 'jwt', or 'oauth'.
MCP_LOG_LEVEL	No	Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').
MCP_SESSION_MODE	No	HTTP session mode: auto, stateful, or stateless.

libofcongress-mcp-server MCP Server

Install

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