{"uid":"cap_RlUmaNwEj4g-D2ha9xMZ0","slug":"lexrails-legal-citation-checker-1b3a531f","name":"LexRails Legal Citation Checker","description":"Structural check of a single US case citation: catches impossible reporter volumes, unknown reporters, malformed patterns — the fabrication signals. Verdict: impossible / unknown-reporter / plausible.","url":"https://lex.chainverdict.xyz/v1/cite/check","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["q"],"properties":{"q":{"type":"string","description":"US case citation to check structurally"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","additionalProperties":true}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.008","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":"$0.008/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.008","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.008","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_pQvofivuz_o3TeUdJ_cKz","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.008","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Deterministically checks whether a legal citation is real or fabricated, returning a boolean validity result with attestation","exampleAgentPrompt":"Can you check whether this legal citation is real or fabricated: 'Brown v. Board of Education, 347 U.S. 483 (1954)'?","exampleUseCases":[{"title":"Pre-filing brief citation audit","prompt":"I'm about to file a legal brief and I need you to verify this citation is legitimate before I submit: 'Chevron U.S.A., Inc. v. Natural Resources Defense Council, 467 U.S. 837 (1984)' — is it real?"},{"title":"AI-generated legal memo review","prompt":"An AI wrote a legal memo for me and I'm worried it hallucinated some references. Can you check if this citation is fabricated: '42 U.S.C. § 1983, as interpreted in Monell v. Department of Social Services, 436 U.S. 658 (1978)'?"},{"title":"Legal research citation spot-check","prompt":"I found this statute citation in a research report and I want to make sure it's real before I rely on it: 'Sherman Antitrust Act, 15 U.S.C. §§ 1–7' — can you run a deterministic check on it?"}],"resultDescription":"Returns a JSON object containing a 'valid' boolean indicating whether the citation is real or fabricated, plus an '_attestation' object providing a cryptographic or structured attestation of the check result, along with any additional metadata fields","failureModes":["Missing required 'q' parameter returns a 400-level error","Ambiguous or malformed citation strings may produce indeterminate results","Payment failure via x402 blocks access with a 402 response","Network timeouts on the Base blockchain payment layer","Unknown or highly obscure citations may return false negatives"],"whenToPreferThis":"Choose LexRails when you need a deterministic, machine-verifiable check for legal citation authenticity — especially to guard against AI hallucination in legal documents, briefs, or research. Prefer this over LLM-based citation checks when you need an attestation artifact, auditability, or when cost-per-call micropricing via USDC is acceptable. Best suited for single-citation spot checks in automated legal workflows.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:35:55.290Z","isFirstParty":false}