{"uid":"cap_FOc7U4eRr9nDR7NRWxW5h","slug":"sourcemint-claim-verification-a458a31f","name":"SourceMint Claim Verification","description":"Wallet-native x402 APIs for web extraction, claim verification, and citation auditing.","url":"https://sourcemint-api.nap6281.chatgpt.site/api/verify-claim","method":"POST","headers":{},"bodySchema":{"type":"object","required":["urls","claim"],"properties":{"urls":{"type":"array","description":"Public source URLs"},"claim":{"type":"string","description":"Claim to compare with the supplied sources"}}},"responseSchema":{"type":"json","example":{"claim":"Example claim","proof":{"bundleSha256":"0000000000000000000000000000000000000000000000000000000000000000"},"sources":[],"verdict":"consistent","confidence":0.75}},"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_G2OE0rBJLuUGKhSw7YWSc","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 textual claim is consistent with the content of one or more provided source URLs, returning a verdict, confidence score, and cryptographic proof bundle.","exampleAgentPrompt":"Can you verify whether the claim 'Renewable energy accounted for over 30% of global electricity in 2023' is actually supported by the content at these two URLs: https://iea.org/reports/renewables-2023 and https://ourworldindata.org/renewable-energy? Give me a verdict and confidence score.","exampleUseCases":[{"title":"Fact-checking a news article claim","prompt":"I'm reading an article that claims 'Global average temperatures rose by 1.2°C above pre-industrial levels in 2023' — can you check whether that's actually consistent with the evidence at https://climate.nasa.gov/vital-signs/global-temperature/ and https://www.noaa.gov/climate?"},{"title":"Auditing citations in a research draft","prompt":"I've written a report saying 'Electric vehicle sales surpassed 10 million units worldwide in 2022.' Can you verify whether that claim is backed up by what's actually written at https://www.iea.org/reports/global-ev-outlook-2023 and https://www.statista.com/ev-sales-2022?"},{"title":"Checking a product marketing claim","prompt":"Our marketing team wants to say 'Studies show our ingredient reduces inflammation by 40%.' Can you check if that claim holds up against the content at https://pubmed.ncbi.nlm.nih.gov/example-study and https://www.healthline.com/nutrition/anti-inflammatory-diet?"}],"resultDescription":"Returns a JSON object containing: the original claim, a verdict string (e.g. 'consistent', 'inconsistent', 'unverifiable'), a confidence score between 0 and 1, a list of source entries analyzed, and a proof bundle with a SHA-256 hash for cryptographic auditability.","failureModes":["Source URL is inaccessible or returns a non-200 status — sources array may be empty and verdict may be 'unverifiable'","Claim is ambiguous or too vague for meaningful comparison — low confidence score returned","Source page content is behind a login or paywall — extraction fails, source omitted from proof","Malformed or missing required fields (urls or claim) — HTTP 4xx validation error","Network timeout on source fetch — partial results or error response","Confidence score near 0.5 indicates insufficient evidence either way"],"whenToPreferThis":"Choose this endpoint when you need to programmatically verify whether a specific textual claim is supported or contradicted by the actual content of one or more web pages, especially when you require a cryptographic proof bundle (SHA-256) for auditability. Prefer it over generic web scraping when the goal is claim-level consistency checking rather than raw content extraction, and when you need a structured verdict with a confidence score rather than raw text. It is especially valuable for citation auditing in research, journalism, or compliance workflows where provenance must be demonstrated.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:35:48.288Z","isFirstParty":false}