{"uid":"cap_qoKjg3hLfJENY-f9tloaC","slug":"agent-evidence-api-57b703bd","name":"Agent Evidence API","description":"Verify a claim against public web sources: send a question and up to 5 URLs, get cited evidence - passages that support, contradict or fail to settle it. Claim verification with a citation for every excerpt: source URL, retrieval time, content hash. Never charges when nothing is retrieved.","url":"https://agent-evidence-api.thx93.workers.dev/v1/evidence?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"properties":{}},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"down","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_5BC6Bullmg7BeADx7T6F8","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Verifies a claim against up to 5 public web URLs, returning cited passages that support, contradict, or fail to settle the claim, each with a source URL, retrieval timestamp, and content hash.","exampleAgentPrompt":"Can you check whether the claim 'the Eiffel Tower is 330 meters tall' is supported or contradicted by these two sources: https://en.wikipedia.org/wiki/Eiffel_Tower and https://www.toureiffel.paris/en — and give me the exact cited passages with timestamps?","exampleUseCases":[{"title":"Fact-checking a news claim","prompt":"I saw a headline saying 'US inflation hit 9% in June 2022' — can you verify that against these three sources and show me the exact passages that support or contradict it: https://www.bls.gov/news.release/cpi.nr0.htm, https://www.federalreserve.gov, and https://apnews.com?"},{"title":"Research citation validation","prompt":"I'm writing a paper and want to confirm the claim 'deep learning outperforms classical ML on image classification benchmarks' — can you check it against these URLs and pull the relevant cited excerpts with source details: https://paperswithbenchmarks.ai, https://arxiv.org/abs/1409.4842?"},{"title":"Debunking a viral social media claim","prompt":"Someone is saying 'coffee causes cancer according to WHO' — can you check whether that's actually supported or contradicted by https://www.who.int and https://www.cancer.org and give me the specific passages with retrieval timestamps?"}],"resultDescription":"Returns cited evidence excerpts from the provided URLs, each labeled as supporting, contradicting, or inconclusive relative to the claim, along with the source URL, retrieval timestamp, and a content hash for auditability. If no content is retrieved, no charge is incurred.","failureModes":["URL is inaccessible, paywalled, or returns no retrievable content — passage not returned, no charge","Claim is too ambiguous for clear support/contradiction classification — returned as inconclusive","More than 5 URLs submitted — request rejected or truncated","Source content has changed since retrieval — hash reflects retrieval-time snapshot only","Network timeout or worker error — HTTP 5xx returned"],"whenToPreferThis":"Choose this endpoint when you need traceable, cited evidence for or against a specific claim, grounded in particular URLs the user or agent specifies. It is ideal when auditability matters (content hash, retrieval time) and when you want verdict-tagged passages rather than a generic web search summary. Prefer it over general search APIs when you already have candidate sources and need structured evidence extraction with citation metadata.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-16T12:29:06.274Z","isFirstParty":false,"canonicalSlug":"agent-evidence-api-57b703bd"}