CourtListener
Search US federal and state court opinions, dockets, judges, and federal regulations.
Access CourtListener's database of US federal and state court opinions, PACER dockets, oral arguments, judge profiles, and eCFR federal regulations. Search by case name, docket number, judge, citation, or full text.
Try asking Muse: "Find all Supreme Court opinions about patent law cited more than 100 times in the last five years."
Source: Found in the official MCP Registry (io.github.Vaquill-AI/courtlistener-mcp) · First listed September 25, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 2 h ago.
Is it safe to connect?
What Muse can see: You sign in to your own account with it, so Muse can reach what that account allows. Read what it asks for before you agree.
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
How to add it to Muse
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-mcp.vaquill.ai/mcp/Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 239ms. Worked in 100% of checks over 30 days.
Screening · September 25, 2026
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.
Tools · 34
statusCheck the status of the CourtListener MCP server. Returns: A dictionary containing server status, system metrics, and service information.search_opinionsSearch case law opinion clusters with nested Opinion documents in CourtListener.search_docketsSearch federal cases (dockets) from PACER in CourtListener.search_dockets_with_documentsSearch federal cases (dockets) with up to three nested documents. If there are more than three matching documents, the more_docs field will be true.search_recap_documentsSearch federal filing documents from PACER in the RECAP archive.search_audioSearch oral argument audio recordings in CourtListener.search_peopleSearch judges and legal professionals in the CourtListener database.get_opinionGet a specific court opinion by ID from CourtListener.get_docketGet a specific court docket by ID from CourtListener.get_audioGet oral argument audio information by ID from CourtListener.get_clusterGet an opinion cluster by ID from CourtListener.get_personGet judge or legal professional information by ID from CourtListener.get_courtGet court information by ID from CourtListener.citation_lookup_citationLook up a legal citation to find the opinion it references in CourtListener. This tool accepts various citation formats including: - U.S. Reporter citations (e.g., "410 U.S. 113") - Federal Reporter citations (e.g., "123 F.3d 456") - WestLaw citations (e.g., "2023 WL 12345") - Stcitation_batch_lookup_citationsLook up multiple legal citations in a single request. This is more efficient than making individual requests for each citation. Accepts up to 100 citations at once.citation_verify_citation_formatVerify if a citation string is in a valid format using citeurl's advanced parsing. This tool performs validation using citeurl's comprehensive citation templates to check if a citation appears to be in a recognized legal citation format. This is much more accurate than simple regcitation_parse_citation_with_citeurlParse a legal citation using citeurl's advanced citation recognition. This tool uses the citeurl library to parse legal citations and extract structured information including tokens, normalized format, and URL generation. Returns detailed information about the citation including:citation_extract_citations_from_textExtract all legal citations from a block of text using citeurl. This tool finds and parses all legal citations within a given text, including both long-form and short-form citations (like 'id.' references).citation_enhanced_citation_lookupEnhanced citation lookup combining citeurl parsing with CourtListener data. This tool first uses citeurl to parse and validate the citation format, then optionally queries the CourtListener API for additional case information.ecfr_list_titlesList all 50 CFR titles with their latest amended/issue dates and status.ecfr_get_title_versionsList the available content versions (issue dates) for one CFR title.ecfr_get_title_structureGet the full hierarchical structure (title -> section) of a CFR title on a date.ecfr_get_ancestryGet the ancestry chain (title -> ... -> node) for a CFR node on a date.ecfr_get_source_xmlFetch the source regulation TEXT (XML) for a CFR node on a snapshot date. Pass a part or section to scope the request. Fetching an entire large title at once can time out on the eCFR side, so narrowing is strongly recommended. Returns the raw XML under ``content_xml``.ecfr_list_agenciesList all agencies that appear in the CFR, with their title/chapter references.ecfr_list_all_correctionsList CFR corrections, optionally filtered by title and/or effective date.ecfr_list_corrections_by_titleList all corrections for a single CFR title.ecfr_search_regulationsFull-text search over federal regulations, returning matching sections with hierarchy.ecfr_get_search_countGet the total number of CFR sections matching a search query.ecfr_get_search_summaryGet summary details (counts + metadata) for a CFR search query.ecfr_get_title_search_countsGet search result counts broken down by CFR title.ecfr_get_daily_search_countsGet search result counts broken down by date (daily histogram).ecfr_get_hierarchy_search_countsGet search result counts distributed across the CFR hierarchy.ecfr_get_search_suggestionsGet search-term suggestions for a partial CFR query.Recent checks
Link
https://courtlistener-mcp.vaquill.ai/mcp/Questions about CourtListener in Muse
How do I connect CourtListener to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use CourtListener to help me. It is a free service with an MCP server at https://courtlistener-mcp.vaquill.ai/mcp/. It needs an API key from Free Law Project; ask me to enter it through your secure credential prompt. 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.
Is CourtListener working right now?
At the last check (September 28, 2026, 07:01 UTC) the endpoint was working, answering in 239ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
Is CourtListener safe to connect to Muse?
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.
What can CourtListener do in Muse?
It exposes 34 tools, including status, search_opinions, search_dockets, search_dockets_with_documents. For example, you could ask Muse: "Find all Supreme Court opinions about patent law cited more than 100 times in the last five years."
Follow CourtListener
Made this app? Claim it or get a status badge
Is this yours?
This listing was added from public sources (Found in the official MCP Registry (io.github.Vaquill-AI/courtlistener-mcp)). If you build CourtListener, claim it to correct the details and get your badge.
Paste this on your site or README. It always shows the latest check.
<a href="https://musedirectory.ai/connector/courtlistener"><img src="https://musedirectory.ai/badge/courtlistener.svg" alt="CourtListener on musedirectory.ai" width="236" height="40"></a>