io.github.cyanheads/courtlistener-mcp-server

up checked 2026-11-11T05:38:57.795Z

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Publisher-provided description

Search US court opinions, federal dockets, judges, citations, and oral arguments via CourtListener.

Summary by lookupd

Search and retrieve US court opinions, federal dockets, judge profiles, citations, financial disclosures and oral argument audio.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http courtlistener-mcp-server https://courtlistener.caseyjhand.com/mcp

Claude Code, npm package (stdio)

claude mcp add courtlistener-mcp-server -- npx -y @cyanheads/courtlistener-mcp-server

Claude Code, npm package (stdio)

claude mcp add courtlistener-mcp-server -- npx -y @cyanheads/courtlistener-mcp-server

Codex, remote (streamable-http)

codex mcp add courtlistener-mcp-server --url https://courtlistener.caseyjhand.com/mcp

Codex, npm package (stdio)

codex mcp add courtlistener-mcp-server -- npx -y @cyanheads/courtlistener-mcp-server

Codex, npm package (stdio)

codex mcp add courtlistener-mcp-server -- npx -y @cyanheads/courtlistener-mcp-server

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "courtlistener-mcp-server": {
      "url": "https://courtlistener.caseyjhand.com/mcp"
    }
  }
}

Cursor, npm package (stdio) → .cursor/mcp.json

{
  "mcpServers": {
    "courtlistener-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/courtlistener-mcp-server"
      ]
    }
  }
}

Cursor, npm package (stdio) → .cursor/mcp.json

{
  "mcpServers": {
    "courtlistener-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/courtlistener-mcp-server"
      ]
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (14 tools)

Publisher-provided text

courtlistener_search_opinions Full-text search across 9M+ written US court opinions with field-level filtering. Returns opinion cluster summaries with case metadata, citations, matched text
courtlistener_get_opinion Fetch text and metadata for an opinion cluster by cluster ID. Returns majority, concurrence and dissent variants with raw HTML and readable plain text, variants
courtlistener_get_citations Retrieve the citation network for an opinion cluster. Supports two directions: "cited_by" (opinions that cite this one — measures precedential influence) and "c
courtlistener_lookup_citation Resolve legal citations (e.g., "410 U.S. 113", "93 S. Ct. 705") to opinion cluster IDs and case metadata. Enables workflows that start from a known citation rat
courtlistener_search_dockets Search RECAP federal court dockets. Query terms match case name, docket number, party, and attorney names; filters narrow by party name, court, and filing date.
courtlistener_get_docket Fetch docket metadata and one entries page by docket ID. Omit document_ids for the docket listing, or select RECAP document IDs embedded on entries_page to retr
courtlistener_get_parties Fetch a page of parties and their attorneys of record for a RECAP federal docket by docket ID. Returns each party's name, role (Plaintiff, Defendant, Petitioner
courtlistener_search_judges Search judge/person records by name, appointing president, court, political affiliation, or demographic. Returns biographical data, current position, and appoin
courtlistener_get_judge Fetch full biographical profile for a single judge: positions on record — judicial appointments across all courts plus non-judicial roles — education, political
courtlistener_lookup_courts List courts with optional filtering by jurisdiction type, active/inactive status, and scraper coverage. Primarily used to discover court IDs for use in search a
courtlistener_search_oral_arguments Search appellate oral argument audio recordings — the largest public collection of oral argument audio. Returns recording metadata with two direct MP3 links per
courtlistener_get_oral_argument Fetch an oral argument recording by audio_id from courtlistener_search_oral_arguments. Returns case metadata, panel IDs, duration, MP3 URL, docket and available
courtlistener_search_financial_disclosures Search federal judicial financial disclosure filings — the annual reports judges file on investments, gifts, debts, outside positions, and income. Filter by jud
courtlistener_get_financial_disclosure Fetch a judicial financial disclosure by disclosure_id from courtlistener_search_financial_disclosures. Returns metadata, counts and typed line items with coded

Details

Version: 0.9.0
Transports: streamable-http, stdio
Uptime (7 days): 100%
Median latency: 902 ms
First indexed: 2026-11-01T09:25:55.277Z
Last seen in registry: 2026-11-01T09:25:55.565Z
Repository: https://github.com/cyanheads/courtlistener-mcp-server

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Last crawl: 2026-11-11T19:17:20.153Z
API base: https://api.lookupd.com
MCP URL: https://api.lookupd.com/mcp