io.github.cyanheads/libofcongress-mcp-server

io.github.cyanheads/libofcongress-mcp-server·v0.2.4·Image, Video & Audio

Quality Score

/100

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

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§00 Trust verdict · v1 advisory · method

UNVERIFIEDno verdict on file

Verdict not yet evaluated for this tool. The hybrid eval runs adversarial cases first; coverage rolls out as the corpus expands. Until a verdict is recorded, an agent should treat this tool as not-yet-cleared and fall back to its own checks. Method: hybrid eval, four-state verdict, honest limits.

§01 Install

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "libofcongress-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/libofcongress-mcp-server"
      ],
      "env": {
        "LOC_USER_AGENT": "libofcongress-mcp-server/0.2.4",
        "LOC_REQUEST_DELAY_MS": "3100",
        "MCP_LOG_LEVEL": "info",
        "MCP_HTTP_HOST": "127.0.0.1",
        "MCP_HTTP_PORT": "3010",
        "MCP_HTTP_ENDPOINT_PATH": "/mcp",
        "MCP_AUTH_MODE": "none"
      }
    }
  }
}

Cursor (.cursor/mcp.json)

{
  "mcpServers": {
    "libofcongress-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/libofcongress-mcp-server"
      ],
      "env": {
        "LOC_USER_AGENT": "libofcongress-mcp-server/0.2.4",
        "LOC_REQUEST_DELAY_MS": "3100",
        "MCP_LOG_LEVEL": "info",
        "MCP_HTTP_HOST": "127.0.0.1",
        "MCP_HTTP_PORT": "3010",
        "MCP_HTTP_ENDPOINT_PATH": "/mcp",
        "MCP_AUTH_MODE": "none"
      }
    }
  }
}

Cline (cline_mcp_settings.json)

npx -y @cyanheads/libofcongress-mcp-server

§02 Environment variables

LOC_USER_AGENT

User-Agent header sent with LOC API requests. LOC recommends a descriptive value for polite access.

LOC_REQUEST_DELAY_MS

Delay in milliseconds between LOC API requests to stay under the 20 req/min rate limit.

MCP_LOG_LEVEL

Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').

LOC_USER_AGENT

User-Agent header sent with LOC API requests. LOC recommends a descriptive value for polite access.

LOC_REQUEST_DELAY_MS

Delay in milliseconds between LOC API requests to stay under the 20 req/min rate limit.

MCP_HTTP_HOST

The hostname for the HTTP server.

MCP_HTTP_PORT

The port to run the HTTP server on.

MCP_HTTP_ENDPOINT_PATH

The endpoint path for the MCP server.

MCP_AUTH_MODE

Authentication mode to use: 'none', 'jwt', or 'oauth'.

MCP_LOG_LEVEL

Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').

§03 MCP Quality Score · methodology

freshness

completeness

installability

documentation

stability

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