{"uid":"cap_aWWIopNA97V_kHY3Clw8k","slug":"realcite-case-citation-verifier-70e3d981","name":"RealCite Case Citation Verifier","description":"Verify a legal case citation: does it exist, and does the given case name match the canonical record? Catches a fabricated case citation, including a real-looking citation number paired with an invented case name. Checked against CourtListener. Does not check whether a case is still good law -- no free authoritative source publishes that.","url":"https://goodsong.dev/verify/case","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"citation":{"type":"string","description":"The case citation, e.g. '576 U.S. 644'."},"case_name":{"type":"string","description":"Optional case name to cross-check against the citation."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_7kNslUm9eyeXvGS7jjYl2","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Verifies whether a legal case citation exists in CourtListener and whether the provided case name matches the canonical record, catching fabricated citations.","exampleAgentPrompt":"Can you check whether the case citation '576 U.S. 644' actually exists and whether it matches the case name 'Obergefell v. Hodges'? I want to make sure this isn't a hallucinated citation before I use it.","exampleUseCases":[{"title":"Hallucination check in AI legal brief","prompt":"I asked an AI to draft a legal memo and it cited 'Johnson v. State, 412 U.S. 218' — can you verify that citation exists and that the case name is correct? I'm worried it made it up."},{"title":"Verifying citation before court filing","prompt":"Before I submit this filing, can you check that '573 U.S. 513' is a real case and that it corresponds to 'Riley v. California'?"},{"title":"Fact-checking a citation in a student paper","prompt":"A law student's paper cites 'Brown v. Board of Education, 347 U.S. 483' — can you confirm that citation is real and the case name matches?"}],"resultDescription":"Returns whether the given case citation exists in CourtListener's database, and if a case name was provided, whether it matches the canonical record for that citation. Flags fabricated or mismatched citations but does not assess whether the case is still good law.","failureModes":["Citation not found in CourtListener (case may be real but not indexed)","Case name provided does not match canonical record for an existing citation","Citation format is malformed or unparseable","CourtListener API unavailable or rate-limited","Does not indicate whether a case has been overruled or is still good law"],"whenToPreferThis":"Use this endpoint when an AI agent or human has produced a legal case citation and you need to verify it isn't fabricated — especially when the citation number looks plausible but the case name may be invented. Best for checking U.S. court cases indexed by CourtListener. Not suitable for checking whether a case is still valid precedent (Shepardizing).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:39:37.652Z","isFirstParty":false}