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courtlistener-mcp
MCP for CourtListener: US federal and state opinions, dockets, judges, plus eCFR regulations.
Tools
34
GitHub stars
2
Installs / wk
—
Licence
MIT
Transport
streamable-http
Last checked
26h ago
Tools & capabilities
34 toolsRead from the running server on 26h ago.
citation_batch_lookup_citations
read-only
citations*
Look 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. Look 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_enhanced_citation_lookup
read-only
citation*include_courtlistener
Enhanced citation lookup combining citeurl parsing with CourtListener data. This tool first uses citeurl to parse and validate the citation format, then optionally queries the Cou… Enhanced 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.
citation_extract_citations_from_text
read-only
text*
Extract 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 citatio… Extract 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_lookup_citation
read-only
citation*
Look 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")… Look 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") - State reporter citations
citation_parse_citation_with_citeurl
read-only
broadcitation*
Parse a legal citation using citeurl's advanced citation recognition. This tool uses the citeurl library to parse legal citations and extract structured information including toke… Parse 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: - Recognized citation format and source - Extracted tokens (volume, reporter, page, etc.) - Generated URL if available - Normalized citation text
citation_verify_citation_format
read-only
citation*
Verify 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 cit… Verify 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 regex matching. Returns information about the citation format and any detected issues.
ecfr_get_ancestry
read-only
date*parttitle*section
Get the ancestry chain (title -> ... -> node) for a CFR node on a date. Get the ancestry chain (title -> ... -> node) for a CFR node on a date.
ecfr_get_daily_search_counts
read-only
datequery*
Get search result counts broken down by date (daily histogram). Get search result counts broken down by date (daily histogram).
ecfr_get_hierarchy_search_counts
read-only
datequery*
Get search result counts distributed across the CFR hierarchy. Get search result counts distributed across the CFR hierarchy.
ecfr_get_search_count
read-only
datequery*titleagency_slugs
Get the total number of CFR sections matching a search query. Get the total number of CFR sections matching a search query.
ecfr_get_search_suggestions
read-only
query*
Get search-term suggestions for a partial CFR query. Get search-term suggestions for a partial CFR query.
ecfr_get_search_summary
read-only
datequery*titleagency_slugs
Get summary details (counts + metadata) for a CFR search query. Get summary details (counts + metadata) for a CFR search query.
ecfr_get_source_xml
read-only
date*parttitle*chaptersectionsubpart
+3
Fetch 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 e… Fetch 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_get_title_search_counts
read-only
datequery*
Get search result counts broken down by CFR title. Get search result counts broken down by CFR title.
ecfr_get_title_structure
read-only
date*title*
Get the full hierarchical structure (title -> section) of a CFR title on a date. Get the full hierarchical structure (title -> section) of a CFR title on a date.
ecfr_get_title_versions
read-only
title*
List the available content versions (issue dates) for one CFR title. List the available content versions (issue dates) for one CFR title.
ecfr_list_agencies
read-only
List all agencies that appear in the CFR, with their title/chapter references. List all agencies that appear in the CFR, with their title/chapter references.
ecfr_list_all_corrections
read-only
datetitle
List CFR corrections, optionally filtered by title and/or effective date. List CFR corrections, optionally filtered by title and/or effective date.
ecfr_list_corrections_by_title
read-only
title*
List all corrections for a single CFR title. List all corrections for a single CFR title.
ecfr_list_titles
read-only
List all 50 CFR titles with their latest amended/issue dates and status. List all 50 CFR titles with their latest amended/issue dates and status.
ecfr_search_regulations
read-only
datepageorderquery*titleper_page
+1
Full-text search over federal regulations, returning matching sections with hierarchy. Full-text search over federal regulations, returning matching sections with hierarchy.
get_audio
read-only
audio_id*
Get oral argument audio information by ID from CourtListener. Get oral argument audio information by ID from CourtListener.
get_cluster
read-only
cluster_id*
Get an opinion cluster by ID from CourtListener. Get an opinion cluster by ID from CourtListener.
get_court
read-only
court_id*
Get court information by ID from CourtListener. Get court information by ID from CourtListener.
get_docket
read-only
docket_id*
Get a specific court docket by ID from CourtListener. Get a specific court docket by ID from CourtListener.
get_opinion
read-only
opinion_id*
Get a specific court opinion by ID from CourtListener. Get a specific court opinion by ID from CourtListener.
get_person
read-only
person_id*
Get judge or legal professional information by ID from CourtListener. Get judge or legal professional information by ID from CourtListener.
search_audio
read-only
q*courtjudgelimitcursororder_by
+3
Search oral argument audio recordings in CourtListener. Search oral argument audio recordings in CourtListener.
search_dockets
read-only
q*courtlimitcursororder_bycase_name
+4
Search federal cases (dockets) from PACER in CourtListener. Search federal cases (dockets) from PACER in CourtListener.
search_dockets_with_documents
read-only
q*courtlimitcursororder_bycase_name
+4
Search 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 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_opinions
read-only
q*courtjudgelimitcursorcited_gt
+5
Search case law opinion clusters with nested Opinion documents in CourtListener. Search case law opinion clusters with nested Opinion documents in CourtListener.
search_people
read-only
q*namelimitcursorschoolorder_by
+4
Search judges and legal professionals in the CourtListener database. Search judges and legal professionals in the CourtListener database.
search_recap_documents
read-only
q*courtlimitcursororder_bycase_name
+6
Search federal filing documents from PACER in the RECAP archive. Search federal filing documents from PACER in the RECAP archive.
status