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8 clients · secrets stay placeholders

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{
  "mcpServers": {
    "mcp-libraryofcongress": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ]
    }
  }
}

claude mcp add mcp-libraryofcongress -- npx -y [email protected]

[mcp_servers.mcp-libraryofcongress]
command = "npx"
args = ["-y", "[email protected]"]

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "mcp-libraryofcongress": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "[email protected]"
      ],
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "mcp-libraryofcongress": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ]
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=mcp-libraryofcongress&config=eyJjb21tYW5kIjoibnB4IiwiYXJncyI6WyIteSIsIm1jcC1saWJyYXJ5b2Zjb25ncmVzc0AzLjAuMSJdfQ%3D%3D"
}

{
  "servers": {
    "mcp-libraryofcongress": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ]
    }
  }
}

{
  "mcpServers": {
    "mcp-libraryofcongress": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ]
    }
  }
}

extensions:
  "mcp-libraryofcongress":
    enabled: true
    name: "mcp-libraryofcongress"
    type: stdio
    cmd: "npx"
    args:
      - "-y"
      - "[email protected]"
    timeout: 300

This is a local package: the command runs on your machine.

Quality – / 100not scored

Not scored: fewer than three checks apply, usually because no remote answered a credential-free probe or the server is a local package.

protocoln/a · weight 25

n/a
protocol.modern, protocol.stateless, protocol.transport, protocol.list_ttlno remote answered a protocol handshake (not probed yet, unreachable, or local-only)

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygienen/a · weight 30

n/a
tools.descriptions, tools.description_length, tools.schemas, tools.annotations, tools.directory_hints, tools.token_cost, tools.api_dumptool list unknown (behind auth, not probed, or empty)

stabilityn/a · weight 15

n/a
stability.changes, stability.rug_pulltool list unknown

dependencies67 · weight 15

pass
deps.known_vulnsno known advisory in 98 resolved packages
fail
deps.mcp_sdk_version@modelcontextprotocol/sdk 1.30.1 has 1 known advisory (GHSA-6qxp-vccf-f47h); update @modelcontextprotocol/sdk to 1.31.0 or later
pass
deps.resolvable[email protected] resolved: 98 packages

Tool list unknown · checked 2026-10-19 16:20 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 91 / 100

provenance90

livenessn/a

freshness85

hygiene100

+repository +namespace-matches-repo +website ~liveness-unmeasured ~updated-51d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Dependencies

[email protected] npm97 dependencies, resolved · MCP SDK @modelcontextprotocol/sdk 1.30.1 · advisories checked 2026-10-19

advisory	severity	package	fixed in
GHSA-6qxp-vccf-f47hMCP TypeScript SDK: OAuth client could send credentials to an authorization server chosen by the MCP server	high	`@modelcontextprotocol/[email protected]`MCP SDK, direct	fixed in `1.31.0`

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0. The graph is what a clean install of this version resolves today; nothing was installed or run. How it is checked.

Endpoints

package	registry	version	runtime	secrets
`mcp-libraryofcongress`	npm	3.0.1	–
`https://github.com/smeet666/mcp-libraryofcongress/releases/download/v3.0.1/mcp-libraryofcongress-3.0.1.mcpb`	mcpb	3.0.1	–

Tools (0)

No tools observed. Local packages are never executed by the registry.

Schemas: list_tools.

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Official server.json

{
  "name": "io.github.smeet666/mcp-libraryofcongress",
  "icons": [
    {
      "src": "https://raw.githubusercontent.com/smeet666/mcp-libraryofcongress/main/assets/icon-128.png",
      "sizes": [
        "128x128"
      ],
      "mimeType": "image/png"
    },
    {
      "src": "https://raw.githubusercontent.com/smeet666/mcp-libraryofcongress/main/assets/icon-512.png",
      "sizes": [
        "512x512"
      ],
      "mimeType": "image/png"
    }
  ],
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "version": "3.0.1",
  "packages": [
    {
      "version": "3.0.1",
      "transport": {
        "type": "stdio"
      },
      "identifier": "mcp-libraryofcongress",
      "registryType": "npm",
      "environmentVariables": [
        {
          "name": "LOC_USER_AGENT",
          "description": "Identify your own client. The project's own identifier is appended, so the Library can always reach a human."
        },
        {
          "name": "LOC_MIN_INTERVAL_MS",
          "description": "Minimum milliseconds between requests. Default 6000, floor 3000."
        },
        {
          "name": "LOC_TIMEOUT_MS",
          "description": "Deadline for one catalogue, record or collection request, in milliseconds. Default 30000."
        },
        {
          "name": "LOC_NEWSPAPER_TIMEOUT_MS",
          "description": "Deadline for one search_newspapers request, in milliseconds. The full-text corpus answers in tens of seconds. Default 90000."
        },
        {
          "name": "LOC_LOG_LEVEL",
          "description": "silent, error, info or debug. Default error. Logs go to stderr."
        }
      ]
    },
    {
      "version": "3.0.1",
      "transport": {
        "type": "stdio"
      },
      "fileSha256": "6da8544ab82a798b0c9f56f107fc050eb99b2c8f94691778dd33d79dea1bfb12",
      "identifier": "https://github.com/smeet666/mcp-libraryofcongress/releases/download/v3.0.1/mcp-libraryofcongress-3.0.1.mcpb",
      "registryType": "mcpb"
    }
  ],
  "repository": {
    "url": "https://github.com/smeet666/mcp-libraryofcongress",
    "source": "github"
  },
  "websiteUrl": "https://github.com/smeet666/mcp-libraryofcongress#readme",
  "description": "Search inside scanned US newspapers and browse the Library of Congress catalogue. No API key."
}