{"uid":"cap_s2J3hI6PBg1-Wv5Xs-1lP","slug":"evidence-fingerprint-claim-verification-ab16fa74","name":"Evidence Fingerprint & Claim Verification","description":"Machine-payable x402 utilities for hashing, Base64, UUID generation, unit and timezone conversion, realtime crypto market data, webpage/document extraction, URL-to-Markdown, metadata, RAG ingestion and deterministic website change detection.","url":"https://x402-gateway-production-1f21.up.railway.app/commerce/evidence-fingerprint?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":{"type":"object","required":["source_url","claims"],"properties":{"claims":{"type":"array","items":{"type":"string","maxLength":600},"maxItems":20,"minItems":1},"source_url":{"type":"string","format":"uri"}},"additionalProperties":false},"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":{"type":"json","example":{"status":"ready"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_TUEyrTMQ4FFfTUeSPFvqn","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches a webpage and deterministically verifies whether specified claims are supported by the page content, returning a fingerprint for evidentiary use.","exampleAgentPrompt":"Check whether the Wikipedia page at https://en.wikipedia.org/wiki/Bitcoin actually supports these two claims: 'Bitcoin was created in 2009' and 'Satoshi Nakamoto is the pseudonymous creator' — and give me a fingerprint I can use as evidence.","exampleUseCases":[{"title":"Fact-check a news article claim","prompt":"Verify that the article at https://techcrunch.com/2024/05/01/openai-gpt5-launch actually supports the claim 'OpenAI launched GPT-5 in May 2024' and return an evidence fingerprint."},{"title":"Audit a supplier's compliance page","prompt":"Check whether https://acmecorp.com/compliance supports these claims: 'ISO 27001 certified' and 'SOC 2 Type II compliant' — I need the fingerprint for our vendor audit records."},{"title":"Price or feature claim verification","prompt":"Go to https://stripe.com/pricing and verify whether it supports the claim 'Stripe charges 2.9% plus 30 cents per transaction' — I want documented evidence for a client proposal."}],"resultDescription":"Returns a JSON object with status 'ready' and evidence fingerprint data indicating which claims were found supported in the fetched page content, usable as tamper-evident proof of webpage state at call time.","failureModes":["Source URL is unreachable or returns non-200 status — claim verification fails with connectivity error","URL points to a paywalled or bot-blocked page — content cannot be extracted","Claims array is empty or exceeds 20 items — schema validation error","Claim text exceeds 600 characters per item — rejected by input schema","Page content is dynamic/JS-rendered and differs from raw HTTP response — claims may not match","Malformed URI in source_url field — immediate validation rejection"],"whenToPreferThis":"Choose this endpoint when you need machine-verifiable, deterministic proof that a specific URL supports a stated claim — especially for compliance auditing, fact-checking pipelines, legal evidence gathering, or RAG ingestion workflows where source attribution must be verifiable. Prefer it over generic scraping endpoints when the output must serve as structured evidence rather than raw content.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-22T18:37:21.532Z","isFirstParty":false,"canonicalSlug":"evidence-fingerprint-claim-verification-ab16fa74"}