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libofcongress-mcp-server

Indexed by io.github.cyanheads
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About

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

Use this server

Add it to your MCP client. The catalogue lists this config verbatim from its source — it does not run, download, or vouch for the server. Review the command before you run it.

Transportstdio (runs a local command)
Env varsLOC_USER_AGENT LOC_REQUEST_DELAY_MS MCP_LOG_LEVEL
Claude Code 
claude mcp add --env LOC_USER_AGENT= --env LOC_REQUEST_DELAY_MS= --env MCP_LOG_LEVEL= libofcongress-mcp-server -- npx @cyanheads/libofcongress-mcp-server
Cursor

Add to Cursor

If the button doesn't open Cursor, use the JSON below — Cursor accepts the same mcpServers config.

VS Code 
code --add-mcp '{"name":"libofcongress-mcp-server","command":"npx","args":["@cyanheads/libofcongress-mcp-server"],"env":{"LOC_USER_AGENT":"","LOC_REQUEST_DELAY_MS":"","MCP_LOG_LEVEL":""}}'
JSON 
{
  "mcpServers": {
    "libofcongress-mcp-server": {
      "command": "npx",
      "args": [
        "@cyanheads/libofcongress-mcp-server"
      ],
      "env": {
        "LOC_USER_AGENT": "",
        "LOC_REQUEST_DELAY_MS": "",
        "MCP_LOG_LEVEL": ""
      }
    }
  }
}

Environment variables are listed by name only — fill in your own values. Entries never carry secrets.