Full-text search of U.S. case law / court opinions (CourtListener type=o). Returns the top matching page (up to limit) with case name, court, date filed, citations, docket number, a snippet, citation count, and a link. Works without a token; set COURTLISTENER_API_TOKEN for a higher rate limit.

Search court dockets (CourtListener type=r) by case name, free text, and/or docket number, optionally scoped to a court. Returns case name, court, docket number, filed/terminated dates, nature of suit, and a link. Works without a token.

List CourtListener courts and their ids (the values used as the court filter in opinion_search / docket_lookup). Optionally filter by jurisdiction code and/or a name substring. Jurisdiction codes include "F" (federal appellate/other), "FD" (federal district), "FB" (bankruptcy), "S" (state), "SA" (state appellate), "SS" (state supreme). Works without a token.

Fetch a full case by id: a cluster (the case: name, citations, date, judges, and its opinion ids) or a single opinion (its full text). Requires COURTLISTENER_API_TOKEN (these endpoints are authentication-only). Use the cluster_id from opinion_search results.

Verify legal citations against CourtListener's database of real cases before relying on them; catches fabricated or mangled citations. Pass free text (a brief, memo, or draft) or a single citation string; every citation recognized in the text is checked. Per citation: FOUND (with case name, date, and link) or an explicit NOT_FOUND / UNKNOWN_REPORTER flag. Requires COURTLISTENER_API_TOKEN (authentication-only endpoint). Caps: 64000 characters of text and 250 citations per call (server rate limit: 60 citations/min).

Look up judges / people in CourtListener's judiciary database (type via /people/) by last and/or first name. Returns id, assembled name, birth/death dates and place, gender, and how many positions are on file. Works without a token.