law

Verify US legal case citations in a passage of text.

Verify US legal case citations in a passage of text. POST { text } where text contains one or more citations (e.g. "Marbury v. Madison, 5 U.S. 137 (1803)"). Returns per-citation results with canonical case name, court, year, docket, citationCount, and a public CourtListener URL — or flags the citation as unverified. Anti-hallucination check for legal LLM output. Underlying opinions are public domain; CourtListener (Free Law Project) is the corpus.

post/api/law/case-verify

Request

  • Base URL: https://2s.io
  • URL: https://2s.io/api/law/case-verify
  • Auth: API key in header PAYMENT-SIGNATURE

Query parameters

trial1

Try before you buy. Set to 1 for one free real call per endpoint per hour — no wallet or payment needed — to verify the endpoint before paying. Equivalent to sending the "X-2s-Trial: 1" request header. Listed only on operations that offer a trial; the others always answer 402.

Request body

textstring required

Text.

Response

(unresolved $ref)

Changes

No recorded changes to this operation across all 1 revision of this API.