Search US court opinions, dockets, judges, and oral arguments from CourtListener's free legal database.
Connects to CourtListener to search 9M+ US court opinions, federal dockets, judge records, and appellate oral argument recordings. Muse can help legal professionals find case law, trace citation networks, research judges, and access judicial financial disclosures.
Try asking Muse: "Find all Supreme Court opinions citing Roe v. Wade and show me which ones have been most influential."
Source: Found in the official MCP Registry (io.github.cyanheads/courtlistener-mcp-server) · First listed September 25, 2026
Each bar is one check, every 15 minutes. Green means it answered. Last checked 2 h ago.
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
musedirectory.ai is not part of Meta. More about how Muse handles your information
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://courtlistener.caseyjhand.com/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
CourtListener MCP Server is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
Choose Create, give it a name, paste the link as the MCP server URL, and save. If it needs a sign-in, ChatGPT asks for it here.
Start a chat, open the tools menu, pick the connector, and ask. ChatGPT asks before it runs a tool the first time.
Custom connectors need a paid ChatGPT plan, and on Team, Enterprise and Edu accounts only an admin can add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in ChatGPT
In Claude, open Settings, then Connectors.
Choose Add custom connector, give it a name, and paste the link.
If it needs a sign-in, Claude sends you to it. Then turn the connector on in a chat from the tools menu and ask.
Custom connectors are available on paid Claude plans; on Team and Enterprise accounts an admin may need to add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in Claude
https://courtlistener.caseyjhand.com/mcpResponse time at the last check: 493ms. Worked in 100% of checks over 30 days.
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
courtlistener_search_opinionsFull-text search across 9M+ written US court opinions with field-level filtering. Returns opinion cluster summaries with case metadata, citations, text previews, and individual opinion variants. Supports CourtListener field syntax (caseName:"roe v wade", court_id:scotus, judge:"Acourtlistener_get_opinionFetch text and metadata for an opinion cluster by cluster ID. Returns opinion variants with raw HTML and readable plain text by default, variants_completion for source coverage, and docket_enrichment. Choose text: plain or html for a single text representation. Oversized selectiocourtlistener_get_citationsRetrieve the citation network for an opinion cluster. "cited_by" lists opinions that cite this cluster; "citing" lists opinions it cites. Result rows default to Published in both directions; select statuses to expand or narrow the search. The free tier supports shallow traversal courtlistener_lookup_citationResolve 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 retucourtlistener_search_docketsSearch RECAP federal court dockets by case name, docket number, party, attorney, court, or filing date. Returns docket metadata, indexed roster counts, and up to three sample filings per docket. Select roster names with include or use courtlistener_get_parties for docket-scoped dcourtlistener_get_docketFetch 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 retrieve their extracted text without further upstream requests. Selected text uses bounded full/outline/page responses; concourtlistener_get_partiesFetch 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 ucourtlistener_search_judgesSearch judge/person records by name, appointing president, court, or political affiliation. Returns biographical data, current position, and appointment summary. Use courtlistener_get_judge for full appointment history and education records.courtlistener_get_judgeFetch 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 repocourtlistener_lookup_courtsList 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 stillcourtlistener_search_oral_argumentsSearch 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 transcourtlistener_get_oral_argumentFetch an oral argument recording by audio_id from courtlistener_search_oral_arguments or courtlistener_get_docket. Returns case metadata, panel IDs, duration, court and CourtListener MP3 URLs, docket and available transcript. Oversized text or metadata returns outline then page rcourtlistener_search_financial_disclosuresSearch federal judicial financial disclosure filings by judge (person ID from courtlistener_search_judges) and filing year. The year filter applies to the fetched page only; follow the cursor to find matches on later pages. Returns filing metadata, category counts, itemized giftscourtlistener_get_financial_disclosureFetch 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 respohttps://courtlistener.caseyjhand.com/mcpNot in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use CourtListener MCP Server to help me. It is a free service with an MCP server at https://courtlistener.caseyjhand.com/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
At the last check (November 13, 2026, 17:30 UTC) the endpoint was working, answering in 493ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
It was screened on September 25, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
It exposes 14 tools, including courtlistener_search_opinions, courtlistener_get_opinion, courtlistener_get_citations, courtlistener_lookup_citation. For example, you could ask Muse: "Find all Supreme Court opinions citing Roe v. Wade and show me which ones have been most influential."
This listing was added from public sources (Found in the official MCP Registry (io.github.cyanheads/courtlistener-mcp-server)). If you build CourtListener MCP Server, claim it to correct the details and get your badge.
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