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io.github.cyanheads/courtlistener-mcp-server

io.github.cyanheads/courtlistener-mcp-server · v0.8.0

Measured by MCP Station

Description written by the publisher, not verified

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

Connect

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

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

Tools as reported by the server

• 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 snippets, and the individual opinion variants filed in each case. Supports CourtListener field syntax (caseName:"roe v wade", court_id:scotu
• 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_completion for source coverage, and docket_enrichment. Oversized selections return outline then page responses; continue retrieval.next_cur
• 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 "citing" (opinions this one cites — reveals the authority chain relied on). This is the primary tool for tracing legal precedent chains. Note:
• 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 rather than a search query. CourtListener extracts every citation it finds in the submitted text, so passing a passage returns one entry per ci
• 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. RECAP is a crowd-sourced mirror of PACER (the federal court filing system) — coverage varies by court and date. Returns docket metadata wit
• courtlistener_get_docket
  Fetch full docket metadata and entry list for a single federal case by docket ID. Returns all available docket entries with document availability status. Documents with is_available=true have a RECAP-stored copy; others require a PACER account. Obtain docket IDs from courtlistener_search_dockets or
• 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, Respondent, etc.), and their attorneys with contact information, scoped to this docket. Costs one party request plus up to five attorney r
• courtlistener_search_judges
  Search judge/person records by name, appointing president, court, political affiliation, or demographic. Returns biographical data, current position, and appointment summary. Use courtlistener_get_judge for full appointment history and education records.
• 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 affiliations, and ABA ratings. The position list is paginated upstream and walked under a page bound; the response reports whether it was t
• 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 and filter parameters across all other courtlistener tools. Defaults to the active bench — the courts CourtListener still scrapes; pass statu
• 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 result (download_url at the originating court, local_path for CourtListener's durable copy), panel judge IDs, and transcript snippets where
• 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 transcript. Oversized text or metadata returns outline then page responses; continue retrieval.next_cursor as cursor with the unchanged ID/
• 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 judge (person ID from courtlistener_search_judges) and/or filing year; the year filter is applied to the fetched page only (CourtListener has n
• 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 values decoded to dollar ranges. Select categories or omit for all. Oversized selections return outline then page responses; continue retri

Tool changes

• 2026-10-19: courtlistener_search_opinions, courtlistener_get_opinion, courtlistener_get_citations, courtlistener_lookup_citation, courtlistener_search_dockets, courtlistener_get_docket, courtlistener_get_parties, courtlistener_search_judges, courtlistener_get_judge, courtlistener_lookup_courts, courtlistener_search_oral_arguments, courtlistener_get_oral_argument
• 2026-10-16: courtlistener_search_opinions, courtlistener_get_opinion, courtlistener_get_citations, courtlistener_lookup_citation, courtlistener_search_dockets, courtlistener_get_docket, courtlistener_get_parties, courtlistener_search_judges, courtlistener_get_judge, courtlistener_lookup_courts, courtlistener_search_oral_arguments, courtlistener_get_oral_argument

Repository · JSON · Text for agents · Registry updated 2026-10-18