{"uid":"cap_sNqR2kvkBYXB_21LuxXW3","slug":"saververify-factual-claim-verification-6ec4b2fe","name":"SaverVerify Factual Claim Verification","description":"Fact-checking and claim verification API for AI agents. Verify whether a cited source supports a claim; check statistics, dates, units and populations in research reports before publication. Separate web research returns a verdict, linked evidence and sources. Source verification is model-assessed, not guaranteed correct. POST /v2/verify; x402 v2 on Base; 0.20 USDC. No signup or API key.","url":"https://api.saververify.com/v2/verify?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.2","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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":"$0.2/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.2","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.2","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_NeJVyhwgh89JHbbO3OUa5","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.2","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Independently verifies externally sourced factual claims using live web sources, returning a verdict of supported, contradicted, mixed, or insufficient_evidence with citations.","exampleAgentPrompt":"Can you independently verify this claim for me: 'The global electric vehicle market surpassed 10 million units sold in 2022' — I need a cited verdict on whether it's supported, contradicted, or has mixed evidence.","exampleUseCases":[{"title":"Fact-checking AI research report claims","prompt":"I have an AI-generated research report that says 'SpaceX launched more rockets in 2023 than any other company in history' — can you verify that claim with cited web sources and tell me if it's supported or contradicted?"},{"title":"Validating third-party data before decision","prompt":"Before I act on this, can you verify whether it's true that 'Inflation in the UK hit 11.1% in October 2022' — I need a verdict with sources so I know if the data I was given is accurate."},{"title":"Cross-checking agent-generated statistics","prompt":"My AI assistant just told me that 'Over 50% of Fortune 500 companies use generative AI in production as of 2024' — can you independently check that claim and give me a supported, contradicted, or mixed verdict with evidence?"}],"resultDescription":"Returns a structured verdict — one of: supported, contradicted, mixed, or insufficient_evidence — along with web sources and citations that back the determination. The agent receives both the classification and the evidence trail used to reach it.","failureModes":["Claim is too vague or ambiguous to evaluate, returning insufficient_evidence","No live web sources found for the specific claim topic","Conflicting sources result in a mixed verdict requiring human judgment","Network or upstream source unavailability delays or fails the verification","Claim involves real-time or future data not indexed on the web","Payment of 0.20 USDC on Base not fulfilled, blocking the request"],"whenToPreferThis":"Choose this endpoint when an AI agent needs an independent, source-backed second check on a specific factual claim found in external research, third-party data, or agent-generated content — especially before taking action or publishing. Not suited for deterministic arithmetic, wallet risk analysis, transaction simulation, or claims that require proprietary databases rather than open web evidence.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-28T12:31:13.659Z","isFirstParty":false,"canonicalSlug":"saververify-factual-claim-verification-6ec4b2fe"}