Koskamo

CourtListener MCP

An MCP server that provides tools to search and retrieve US court opinions, federal dockets, judge records, citation networks, and oral arguments from CourtListener's 9M+ opinion corpus and its RECAP mirror of PACER. It supports STDIO or Streamable HTTP connections.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

CourtListener MCP logo, by cyanheadsCommunity listingLocal stdioSource reviewed; not executedPublished by cyanheads
Vendor documentation

What you can do with it

  • Search US court opinions with field syntax and filters
  • Trace citation networks for legal clusters
  • Search and fetch federal dockets via RECAP
  • Look up judges and courts by various criteria

Source and maintenance

Community listingRegistry 0.8.0
mcp-registry: io.github.cyanheads/courtlistener-mcp-server@0.8.0Source repository
Maintenance checked

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

@cyanheads/courtlistener-mcp-server 0.8.0

npmnpx
@cyanheads/courtlistener-mcp-server package definition
{
  "version": "0.8.0",
  "transport": "stdio",
  "identifier": "@cyanheads/courtlistener-mcp-server",
  "runtimeHint": "npx",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "environmentVariables": [
    {
      "name": "COURTLISTENER_API_TOKEN",
      "format": "string",
      "isRequired": true,
      "description": "CourtListener API token from your account settings. Required for API access."
    },
    {
      "name": "MCP_LOG_LEVEL",
      "format": "string",
      "default": "info",
      "description": "Sets the minimum log level for output (e.g., 'debug', 'info', 'warn')."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.
Cursor configuration
{
  "mcpServers": {
    "courtlistener-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/courtlistener-mcp-server@0.8.0"
      ],
      "env": {
        "COURTLISTENER_API_TOKEN": "<YOUR_COURTLISTENER_API_TOKEN>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "courtlistener-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/courtlistener-mcp-server@0.8.0"
      ],
      "env": {
        "COURTLISTENER_API_TOKEN": "<YOUR_COURTLISTENER_API_TOKEN>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.
VS Code configuration
{
  "servers": {
    "courtlistener-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/courtlistener-mcp-server@0.8.0"
      ],
      "env": {
        "COURTLISTENER_API_TOKEN": "<YOUR_COURTLISTENER_API_TOKEN>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.
Claude Desktop configuration
{
  "mcpServers": {
    "courtlistener-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/courtlistener-mcp-server@0.8.0"
      ],
      "env": {
        "COURTLISTENER_API_TOKEN": "<YOUR_COURTLISTENER_API_TOKEN>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

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