{"uid":"cap_di5uEurf40NOWlhDGrjSM","slug":"capi2-claim-verify-a68ec39d","name":"capi2 Claim Verify","description":"Agent-native evidence-backed claim verification with x402 micropayments on Base USDC.","url":"https://capi2-claim-verify.onrender.com/v1/procurement-claim-check","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"claim":{"type":"string","maxLength":1200,"minLength":3,"description":"Vendor, product, compliance, security, or commercial claim to verify."},"claim_id":{"type":"string","maxLength":200},"vendor_url":{"type":"string","format":"uri","description":"Public source URL containing evidence relevant to the claim."},"source_urls":{"type":"array","items":{"type":"string","format":"uri"},"maxItems":3,"minItems":1,"description":"Optional list of up to three public evidence URLs. These are checked together; vendor_url remains supported for backward compatibility.","uniqueItems":true},"vendor_name":{"type":"string","maxLength":200},"request_type":{"type":"string","maxLength":120},"verification_type":{"type":"string","maxLength":120}}},"responseSchema":{"type":"json","example":{"claim":"Vendor states that customer data is encrypted at rest.","caveats":["Checks only the supplied public URL."],"verdict":"SUPPORTED_BY_SUPPLIED_SOURCE","evidence":[{"text":"Customer data is encrypted at rest.","score":0.9,"source_url":"https://example.com/security"}],"protocol":"capi2.claim_verify/1.6.1","checked_at":"2026-08-26T15:00:00Z","confidence":0.88,"request_id":"cv_018f5f8f0c2b4f7a","vendor_url":"https://example.com/security","source_results":[{"status":"checked","final_url":"https://example.com/security","requested_url":"https://example.com/security"}],"sources_checked":1,"evidence_summary":"Customer data is encrypted at rest.","verification_result":"supported","verification_status":"supported","evidence_source_urls":["https://example.com/security"]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/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_FmKTVesjlaoaYS_BacaZC","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Verifies vendor, compliance, security, or commercial claims against supplied public evidence URLs, returning a verdict and confidence score.","exampleAgentPrompt":"Check whether Acme Corp's claim that 'all customer data is encrypted at rest and in transit' is supported by evidence on their security page at https://acmecorp.com/security — I need to know the verdict and how confident you are.","exampleUseCases":[{"title":"Vendor security claim audit","prompt":"Before we renew our contract with CloudBase, verify their claim that 'all data is processed exclusively within EU data centers' — their trust page is at https://cloudbase.io/trust. Give me the verdict and any caveats."},{"title":"Procurement compliance check","prompt":"We're onboarding a new supplier who says they're ISO 27001 certified. Can you check their claim against their compliance page at https://supplierco.com/compliance and tell me if the evidence supports it?"},{"title":"RFP vendor statement validation","prompt":"A vendor in our RFP stated 'our platform maintains 99.99% uptime guaranteed by SLA.' Verify that claim using their SLA documentation at https://vendor.com/sla and let me know the confidence level."}],"resultDescription":"Returns a structured JSON object containing a verdict (e.g. SUPPORTED_BY_SUPPLIED_SOURCE, UNSUPPORTED, INCONCLUSIVE), a confidence score (0–1), extracted evidence snippets with relevance scores, an evidence summary, source check statuses, caveats about scope, and a timestamped request ID. The agent can use the verdict and confidence to make procurement or compliance decisions.","failureModes":["Supplied URL is unreachable or returns non-200 — source_results will show failed status and evidence will be empty","Claim text is too short (<3 chars) or too long (>1200 chars) — returns 400 validation error","No relevant evidence found at the URL — verdict may be INCONCLUSIVE or UNSUPPORTED with low confidence","Micropayment via x402 fails or wallet has insufficient USDC — payment rejected before processing","URL content is behind a login or paywall — only publicly accessible content is checked"],"whenToPreferThis":"Choose this endpoint when you need evidence-grounded claim verification against specific public URLs rather than open-web search. It is purpose-built for procurement, vendor due diligence, and compliance workflows where you have a concrete textual claim and one or more authoritative source URLs to check against. Prefer it over generic web search when you want a structured verdict and confidence score you can pipe directly into a decision workflow.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:35:44.572Z","isFirstParty":false}