{"uid":"cap_pF0Z33YbUEspMZ-S_6_3V","slug":"payerproof-trust-score-api-8c256b20","name":"PayerProof Trust Score API","description":"Trust score (0-100) for an x402 service listed in the Bazaar: liveness probe, on-chain payer diversity, reported-vs-verified revenue (detects inflated counters and self-dealing), and listing age. Returns full component breakdown and flags.","url":"https://payerproof-production.up.railway.app/score?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":null,"responseSchema":{"type":"json","example":{"flags":["concentrated_payers"],"grade":"B","score":72,"resource":"https://api.example.com/paid","components":{"liveness":{},"listingAge":{},"payerDiversity":{},"revenueVerification":{}}}},"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_Q4b5YPXiraAkE2zWCuyOb","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes a 0-100 trust score for an x402 service listed in the Bazaar, combining liveness, on-chain payer diversity, revenue verification, and listing age into a graded report with flags.","exampleAgentPrompt":"Before I start using this paid x402 API at https://api.example.com/paid, can you run a PayerProof trust score on it and tell me the grade, any red flags like concentrated payers or inflated revenue, and the breakdown of each component?","exampleUseCases":[{"title":"Vetting a new Bazaar API before integrating","prompt":"I found an x402 API at https://api.someservice.com/data listed on the Bazaar — can you score its trustworthiness before I wire it into my agent? I want to see the grade, the payer diversity result, and any flags raised."},{"title":"Detecting self-dealing in a marketplace listing","prompt":"I'm worried this x402 service at https://api.suspiciousvendor.com/endpoint might be faking its own revenue to look popular — can you run a PayerProof check and tell me if the revenue verification or self-dealing flags come back positive?"},{"title":"Comparing trust grades across multiple x402 services","prompt":"I'm evaluating two competing x402 APIs — https://api.service-a.com/v1/query and https://api.service-b.com/v1/query — can you get PayerProof scores for both and tell me which one has the better grade and fewer risk flags?"}],"resultDescription":"A JSON object containing a numeric trust score (0-100), a letter grade (e.g. A, B, C), a list of warning flags (e.g. concentrated_payers, inflated_revenue, self_dealing), and a full component breakdown covering liveness probe result, listing age, payer diversity metrics, and reported-vs-verified revenue comparison.","failureModes":["Resource URL not found in Bazaar listings — returns error indicating unrecognized listing","Service is unreachable during liveness probe — liveness component fails, score reduced","On-chain data unavailable for the seller address — revenue verification component incomplete","Invalid or malformed resource URL input — returns validation error","Rate limit or payment failure for the $0.02 USDC per-call fee — request rejected"],"whenToPreferThis":"Use this endpoint when you need to vet the credibility of a specific x402 service before integrating it or paying for its calls, especially when suspicious of inflated revenue counters, self-dealing, or low payer diversity. It is the right choice over generic on-chain lookup tools because it combines liveness, payer diversity, revenue verification, and listing age into a single graded trust score tailored to the Bazaar/x402 ecosystem.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-30T00:31:15.556Z","isFirstParty":false,"canonicalSlug":"payerproof-trust-score-api-8c256b20"}