{"uid":"cap_zmiT4o92uVkV9ddHqt3qR","slug":"verity-suite-faithful-quick-check-6245d8f7","name":"Verity Suite – Faithful Quick Check","description":"The trust fabric for AI agents — calibrated, fail-closed services agents pay per call.","url":"https://suite.veritylayer.dev/faithful/quick","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"mode":{"anyOf":[{"type":"string","maxLength":2000},{"type":"null"}],"title":"Mode","default":null,"description":"'summary' or 'translation'. If absent, the checker applies the stricter union of both checks rather than guessing a mode."},"source":{"type":"string","title":"Source","maxLength":2000,"minLength":1,"description":"the original source text; the sole ground truth the candidate is judged against"},"candidate":{"type":"string","title":"Candidate","maxLength":2000,"minLength":1,"description":"the summary or translation to check against the source"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_L8PeS45bJ4AwPJCWSq7VG","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether a candidate summary or translation is faithful to its source text, returning a calibrated verdict, faithfulness score, and claim-level reasons.","exampleAgentPrompt":"Check whether this summary is faithful to the original article — the original is: 'The Federal Reserve raised interest rates by 0.5% citing persistent inflation.' and the candidate summary is: 'The Fed cut rates to stimulate the economy.' Use summary mode.","exampleUseCases":[{"title":"Hallucination guard for AI summarizer","prompt":"I have an AI-generated summary of a legal brief and I need to know if it's faithful to the original text before I send it to a client. Original: 'The contract requires delivery within 30 days of signing, with a penalty of $500 per day of delay.' Candidate: 'The contract requires delivery within 60 days with no specified penalty.' Can you check if that summary is faithful?"},{"title":"Translation accuracy check for localization","prompt":"We just translated a product disclaimer from English to Spanish. Can you verify the Spanish translation is faithful to the English source? Source: 'This product is not intended for use by children under 12.' Translation: 'Este producto no está destinado a personas menores de 18 años.' Use translation mode."},{"title":"RAG answer faithfulness audit","prompt":"My RAG pipeline produced this answer based on a retrieved passage and I want to make sure it didn't hallucinate. The retrieved source is: 'Q3 revenue grew 18% year-over-year driven by cloud subscriptions.' The generated answer is: 'Revenue grew 18% in Q3, primarily from hardware sales.' Is the answer faithful to the source?"}],"resultDescription":"Returns a verdict enum ('faithful', 'minor_drift', 'unfaithful', or 'uncertain'), a faithfulness score, and an array of concrete claim-level reasons citing specific source-vs-candidate discrepancies or confirmations. Optionally includes an Ed25519-signed VerityLayer receipt for auditability.","failureModes":["Source or candidate text exceeds 2000 characters — request rejected with validation error","Missing required fields (source, candidate) — 400-level error","Payment not included or insufficient — 402 Payment Required via x402 protocol","Uncertain verdict returned when the model cannot confidently assess faithfulness","Signing not configured — receipt field returns null"],"whenToPreferThis":"Choose this endpoint when you need a fast, per-call, pay-as-you-go faithfulness check with calibrated verdicts and verifiable signed receipts — ideal for AI pipelines that generate summaries or translations and need lightweight hallucination detection without standing up a dedicated evaluation model. Prefer it over general LLM self-evaluation when you need a trust anchor with cryptographic receipts and fail-closed behavior.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:57:43.158Z","isFirstParty":false}