{"uid":"cap_1F28Qi9018PAhktMm6f0y","slug":"agent-data-tools-revmesh2074-workers-dev-fact-check-verify-claim-22ff0e26","name":"Fact Check / Verify Claim Against Live Web Sources","description":"Check a claim against the live web in one call: a Brave search, the top pages read, and a verdict from Llama 4 Scout using those sources only (supported, contradicted, mixed or unverified) with a short explanation, [n] citations and the sources. A model's reading of a few search results, not an editorial fact-check. Results are for immediate use only (Brave API terms). Use to screen a statement before an agent repeats or acts on it.","url":"https://agent-data-tools.revmesh2074.workers.dev/ai/fact-check?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","required":["claim"],"properties":{"claim":{"type":"string","description":"The claim to check, at most 400 characters"}}},"responseSchema":{"type":"object","properties":{"claim":{"type":"string"},"model":{"type":"string"},"terms":{"type":"string"},"sources":{"type":"array","items":{"type":"object","properties":{"n":{"type":"number"},"url":{"type":"string"},"title":{"type":"string"}}}},"verdict":{"type":"string"},"explanation":{"type":"string"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USD","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_fV7Or83v3zSX8x8H5IUYT","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"agent-data-tools.revmesh2074.workers.dev","brandSlug":"agent-data-tools-revmesh2074-workers-dev-x402","brandBaseUrl":"https://agent-data-tools.revmesh2074.workers.dev","brandDocsUrl":null,"whatItDoes":"Searches the live web via Brave, reads top pages, and uses Llama 4 Scout to return a verdict (supported, contradicted, mixed, or unverified) with explanation and citations for a given claim.","exampleAgentPrompt":"Before you include this in the report, can you fact-check the claim that 'the Amazon rainforest absorbs 2 billion tons of CO2 per year' against live web sources and tell me if it's supported, contradicted, or mixed?","exampleUseCases":[{"title":"Screen viral claim before sharing","prompt":"I just saw a post saying 'mRNA vaccines alter human DNA permanently' — can you check that claim against current web sources and give me a verdict before I decide whether to retweet it?"},{"title":"Verify news headline accuracy","prompt":"Can you fact-check this for me: 'Elon Musk sold all his Tesla shares in 2024' — search the live web and tell me if it's supported, contradicted, or unverified with your sources?"},{"title":"Validate statistic in draft report","prompt":"Before I finalize this report, please verify the claim 'global electric vehicle sales exceeded 14 million units in 2023' against current web sources and give me a verdict with citations."}],"resultDescription":"Returns a JSON object containing: the original claim, the model used (Llama 4 Scout), a terms field, a verdict string (supported, contradicted, mixed, or unverified), a short natural-language explanation of the verdict, and an array of numbered source citations each with URL and title. Results are for immediate use only per Brave API terms.","failureModes":["Claim exceeds 400 characters — request rejected","Brave search returns no relevant results — verdict returned as 'unverified'","Top pages are paywalled or dynamically rendered and cannot be read — limited source quality","Model may misinterpret ambiguous or context-dependent claims","Results reflect model reading of search snippets, not authoritative editorial fact-checking","Transient Brave API or Workers AI outage — HTTP 5xx returned"],"whenToPreferThis":"Choose this endpoint when an AI agent needs a fast, automated pre-flight check on a specific claim before repeating or acting on it — especially in pipelines that generate or relay factual statements. Prefer this over manual search when you want a structured verdict with citations in a single call. Not a substitute for authoritative editorial fact-checking; best suited for screening, not definitive adjudication. Use when the claim is self-contained and under 400 characters.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-30T07:17:20.769Z","isFirstParty":false,"canonicalSlug":"agent-data-tools-revmesh2074-workers-dev-fact-check-verify-claim-22ff0e26"}