{"uid":"cap_X4zL5o_vZyL2ISL8Q-gG1","slug":"crucible-claim-research-fact-check-26e11237","name":"Crucible Claim Research & Fact-Check","description":"Pay-per-call Web3 agent services: wallet, token and agent security audits; token prices, depeg checks and portfolio valuation; cited fact-checking and source research.","url":"https://crucible.unitynodes.com/research/claim","method":"POST","headers":{},"bodySchema":{"type":"object","required":["claim","evidence"],"properties":{"claim":{"type":"string","description":"Claim to verify"},"evidence":{"type":"string","description":"Evidence text to check the claim against"}}},"responseSchema":{"type":"object","properties":{"cost":{"type":"number"},"data":{"type":"object","properties":{"claim":{"type":"string"},"verdict":{"type":"string"}}},"sources":{"type":"array","items":{"type":"object","properties":{"url":{"type":"string"},"hash":{"type":"string"},"name":{"type":"string"}}}},"evidence":{"type":"array","items":{"type":"object","properties":{"claim":{"type":"string"},"support":{"type":"string"},"sourceIndex":{"type":"number"}}}},"riskScore":{"type":"number"},"confidence":{"type":"number"},"contentHash":{"type":"string"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_CLNMg6UXwmQ4qk_-cGEfN","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Verifies a factual claim against provided evidence text, returning a verdict, confidence score, risk score, cited sources, and per-claim support breakdown.","exampleAgentPrompt":"Fact-check this claim for me: 'Ethereum completed the Merge in September 2022' — here's the evidence text from a recent article: 'The Ethereum network transitioned from proof-of-work to proof-of-stake on September 15, 2022, reducing energy consumption by over 99%.' Give me a verdict with confidence and any cited sources.","exampleUseCases":[{"title":"Verifying a crypto project claim","prompt":"Check whether this claim is accurate: 'USDC has never lost its dollar peg.' Here's the evidence: 'In March 2023, USDC briefly depegged to $0.87 following the collapse of Silicon Valley Bank, which held a portion of Circle's reserves.' Give me a verdict and confidence score."},{"title":"Fact-checking a DeFi whitepaper assertion","prompt":"I need to verify a claim from a DeFi whitepaper — the claim is 'Our protocol has never been exploited since launch in 2021.' The evidence I have is: 'In August 2022, the protocol suffered a $3M exploit due to a reentrancy vulnerability, which was later patched.' Is the claim supported?"},{"title":"Validating a news story assertion","prompt":"Fact-check this statement: 'Bitcoin reached an all-time high of $100,000 in 2024.' The evidence text is: 'Bitcoin surpassed $100,000 for the first time on December 4, 2024, reaching approximately $103,600 on several major exchanges.' What's the verdict and how confident are you?"}],"resultDescription":"Returns a verdict string (e.g. supported/refuted/inconclusive), a confidence score (0–1), a risk score, an array of cited source objects (url, name, hash), a per-claim evidence breakdown with support ratings and source indices, and a content hash for auditability. Also echoes the original claim.","failureModes":["Missing required 'claim' or 'evidence' field returns a 400 validation error","Insufficient or vague evidence may yield low confidence score and inconclusive verdict","Payment failure via x402 protocol returns 402 status before processing","Very long evidence text may time out or be truncated","Sources array may be empty if no external sources are resolved from the evidence"],"whenToPreferThis":"Choose this endpoint when you need a structured, confidence-scored, source-cited verdict on a specific claim checked against provided evidence text — especially in Web3 or research contexts where auditability (content hash) and cited sourcing matter. Prefer over generic LLM fact-checking when you need a risk score, per-claim evidence breakdown, and cryptographic content hash for verification. Best when you already have evidence text and want a formal verdict rather than open-ended research.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:43:21.629Z","isFirstParty":false}