courtlistener-mcp-server

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Tools

10 tools spanning the full CourtListener dataset — opinion search and retrieval, citation network traversal, federal docket lookup, judge biography, court discovery, and oral argument search:

Tool	Description
courtlistener_search_opinions	Full-text search across 9M+ written court opinions with field-level filtering, date ranges, status, and sort
courtlistener_get_opinion	Fetch full text and metadata for an opinion cluster — returns all opinion variants (majority, concurrence, dissent)
courtlistener_get_citations	Retrieve the citation network for an opinion: opinions cited by it (citing) or that cite it (cited_by)
courtlistener_lookup_citation	Resolve a legal citation string (e.g., "410 U.S. 113") to a cluster ID and case metadata
courtlistener_search_dockets	Search RECAP federal court dockets by party name, attorney, court, and date
courtlistener_get_docket	Fetch docket metadata and entry list for a single federal case
courtlistener_search_judges	Search judge records by name, appointing president, court, and political affiliation
courtlistener_get_judge	Fetch full biographical profile, appointment history, and education for a single judge
courtlistener_lookup_courts	List courts filtered by jurisdiction type and active-scraper status
courtlistener_search_oral_arguments	Search appellate oral argument audio recordings by case name, court, and date argued

courtlistener_search_opinions

Search the 9M+ opinion corpus. Returns opinion cluster summaries with matched text excerpts.

• Free-text queries with field syntax: caseName:, court_id:, judge:, docketNumber:, cites:(id), boolean AND / OR / NOT
• Filter by court ID, date range, publication status (Published / Unpublished / In-chambers, etc.)
• Sort by relevance score, filing date (asc/desc), or citation count
• Cursor-based pagination; up to 20 results per call
• Results include cluster_id (for courtlistener_get_opinion) and docket_id (for courtlistener_get_docket) for chaining

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courtlistener_get_opinion

Fetch full text and metadata for an opinion cluster.

• A cluster groups all opinions filed in a case: majority, concurrence, dissent, per curiam
• Returns html_text and plain_text for each opinion variant; surfaces download_url when local text is absent
• Includes cites[] (outbound citation IDs), cite_count, syllabus, posture, and docket link
• Single upstream request — safe within the tight free-tier rate limit

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courtlistener_get_citations

Retrieve the citation network for an opinion cluster in either direction.