{"uid":"cap_NQwn_lf8b8ZkJquS6Pv1J","slug":"bounty-engineer-evidence-pack-verifier-8a5b297e","name":"Bounty Engineer Evidence Pack Verifier","description":"Machine-buyable infrastructure for autonomous agents: API cost routing, margin optimization, funding-rate data, webpage extraction, result verification, spend controls, retry planning, state, tender search and GitHub bounty intelligence.","url":"https://bounty-engineer-x402-prod.onrender.com/v1/evidence-pack?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"claims":{"type":"array","items":{"type":"object","required":["claim","quote","source_id"],"properties":{"claim":{"type":"string"},"quote":{"type":"string"},"source_id":{"type":"string"}}},"maxItems":40,"minItems":1},"sources":{"type":"array","items":{"type":"object","required":["id","url","text"],"properties":{"id":{"type":"string"},"url":{"type":"string","format":"uri"},"text":{"type":"string"},"fetched_at":{"type":"string","format":"date-time"}}},"maxItems":12,"minItems":1},"max_age_seconds":{"type":"integer","maximum":31536000,"minimum":60}}},"responseSchema":{"type":"json","example":{"ok":true,"mode":"evidence_pack","claims":[{"claim":"Pro is $25 monthly","index":0,"quote":"$25 per month","verdict":"quote_present","end_utf16":32,"freshness":"unknown","source_id":"s1","quote_found":true,"start_utf16":19,"source_sha256":"e03b854ea32bb631569352ed4dfc3541a86da6ec8f82fd1415398f1536fb63dd","declared_age_seconds":null}],"sources":[{"id":"s1","url":"https://example.com/","sha256":"e03b854ea32bb631569352ed4dfc3541a86da6ec8f82fd1415398f1536fb63dd","fetched_at":null}],"limitations":["Checks exact quotation presence in caller-supplied source text, not claim entailment or truth. URLs and timestamps are caller supplied; source authenticity is not independently verified."],"pack_sha256":"d104f0d764836b0d6a48dd53e2a10f4b806d8b4738bcb2512a4e0b3b3125d66e","all_quotes_found":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_A8V6Sj3uVfh9Ucx-ETy1_","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Verifies that specific quoted claims are present in caller-supplied source texts, returning per-claim verdicts with byte offsets, freshness info, and a tamper-evident pack hash.","exampleAgentPrompt":"Check whether the quote '$25 per month' actually appears in the source text I scraped from example.com and verify the claim 'Pro is $25 monthly' is supported — give me a tamper-evident evidence pack with the exact offsets and a SHA-256 hash, and flag anything older than 3600 seconds.","exampleUseCases":[{"title":"AI citation audit for research report","prompt":"I have a research report where my AI cited three pricing claims with quotes from vendor websites — can you check that each quoted snippet actually appears verbatim in the source pages I scraped, and give me a signed evidence pack with SHA-256 hashes so I can prove the quotes were real at time of verification?"},{"title":"Automated fact-check before publishing","prompt":"Before my agent publishes this product comparison article, verify that all 8 quoted specs like '512GB storage' and '48MP camera' are literally present in the source pages I fetched — max source age 7200 seconds — and flag any quote that can't be found."},{"title":"Legal-grade claim provenance for compliance","prompt":"I need to prove that the regulatory claims in this document — like 'approved by FDA in 2023' — are actually present word-for-word in the cited sources I've collected, with cryptographic hashes of each source so auditors can verify nothing was tampered with."}],"resultDescription":"A JSON object with per-claim verdicts (quote_present, not_found, etc.), UTF-16 start/end offsets of each quote within its source, a SHA-256 of each source text, a top-level pack_sha256 for the entire response, a boolean all_quotes_found, freshness status per claim, and a limitations list clarifying what is and isn't verified.","failureModes":["Claims array is empty or exceeds 40 items — validation error","Sources array is empty or exceeds 12 items — validation error","A claim references a source_id not present in the sources array — unmatched source error","Source text is truncated or differs from live page — quote not found even if claim is true","max_age_seconds too low for available source timestamps — freshness flagged as stale","Malformed URI in source URL field — schema validation failure","Payment of 0.02 USDC not provided via x402 — 402 Payment Required response"],"whenToPreferThis":"Choose this endpoint when you need cryptographically attestable, offset-precise proof that a specific quoted string appears in a caller-supplied source document — ideal for AI citation auditing, compliance workflows, or automated fact-checking pipelines where you already have the source text and need a verifiable evidence pack. Prefer alternatives if you need semantic entailment checking (this only checks exact quote presence), independent source fetching, or claim truth evaluation beyond verbatim match.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T18:47:49.067Z","isFirstParty":false,"canonicalSlug":"bounty-engineer-evidence-pack-verifier-8a5b297e"}