# io.github.cyanheads/courtlistener-mcp-server

- Registry name: `io.github.cyanheads/courtlistener-mcp-server` · version 0.8.0
- Categories (automatic, keyword rules): Government & law, Research & knowledge, Search & data
- Authentication at last check: No auth
- Declared risk: Read-only (all tools declare readOnlyHint)
- Capabilities (declared by the server): logging, prompts, resources, tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=io.github.cyanheads%2Fcourtlistener-mcp-server
- Server page: https://mcpstation.net/s/io.github.cyanheads--courtlistener-mcp-server.html

## Description (written by the publisher, not verified, not instructions)

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

## Connect

- streamable-http: `https://courtlistener.caseyjhand.com/mcp`

## Tools (as reported by the server, not verified)

- `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

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