{"apiVersion":"1.0.0","schemaVersion":1,"generatedAt":"2026-08-15T05:28:19.442Z","resource":{"id":"4cbeeab7d234f31720399f9c","key":"GET https://k2so.wrong.systems/api/services/x402-listing-due-diligence-before-first-payment","method":"GET","resourceUrl":"https://k2so.wrong.systems/api/services/x402-listing-due-diligence-before-first-payment","alternateResourceUrls":["https://k2so.wrong.systems/api/services/x402-listing-due-diligence-before-first-payment"],"canonicalUrl":"https://k2so.wrong.systems/api/services/x402-listing-due-diligence-before-first-payment","origin":"https://k2so.wrong.systems","hostname":"k2so.wrong.systems","groupId":"k2so-wrong-systems-95534db3","providerName":"k2so","title":"https://k2so.wrong.systems/api/services/x402-listing-due-diligence-before-first-payment","description":"Paid agent-facing decision procedure for buyer-side x402 listing due diligence: when a discovery surface (PayAI, Coinbase Bazaar, mpp.dev, agent.json, llms.txt) presents a paid API listing, verify the listing against the live 402 challenge BEFORE paying. Covers price parity (listed amount vs challenge amount), network parity (chain and settlement asset match), schema parity (declared method and input vs real handler), challenge freshness (stale challenge, dead endpoint, 404 instead of 402), and","tags":["agent","discovery","procedure","uncategorized","x402"],"type":"http","x402Version":2,"routeTemplate":null,"input":{"type":"http","method":"GET","bodyType":null,"bodyFieldNames":[],"pathParamNames":[],"queryParamNames":["meta","topic"]},"iconUrl":null,"payment":{"networks":["eip155:8453"],"schemes":["exact"],"assets":["0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","USD Coin"],"options":[{"network":"eip155:8453","scheme":"exact","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","amountAtomic":"2000","payTo":"0xc85f0CF16F5e677bBE5dFc94662Cc86F2FbA0604","maxTimeoutSeconds":300,"tokenName":"USD Coin","tokenVersion":"2"}],"acceptedPaymentCount":1,"priceUsd":null},"quality":{"l30DaysTotalCalls":1,"l30DaysUniquePayers":1,"lastCalledAt":"2026-08-10T17:03:45.391Z"},"registry":{"health":"healthy","reliabilityScore":87,"paymentValid":true,"domainVerified":false,"lastChecked":"2026-08-11 02:28:10"},"sources":[{"id":"cdp-bazaar","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","observedAt":"2026-08-11T05:29:41.845Z","lastUpdated":"2026-08-10T17:03:45.66Z","recordKey":"GET https://k2so.wrong.systems/api/services/x402-listing-due-diligence-before-first-payment"},{"id":"402-index","sourceUrl":"https://402index.io/api/v1/services","observedAt":"2026-08-11T05:29:41.845Z","lastChecked":"2026-08-11 02:28:10","registrySource":"bazaar","recordKey":"GET https://k2so.wrong.systems/api/services/x402-listing-due-diligence-before-first-payment"}],"verification":{"level":"direct-quote","checkedAt":"2026-08-15T02:50:19.931Z","structural":{"ok":true,"normalized":true,"publicHttpUrl":true},"sourceConfirmed":true,"crossSource":true,"registryPaymentValid":true,"originCheck":{"scope":"origin","reachable":true,"statusCode":200,"method":"HEAD","checkedAt":"2026-08-15T02:50:19.931Z","latencyMs":3587,"error":null},"quoteCheck":{"scope":"exact-route","outcome":"confirmed","attempted":true,"requestedMethod":"GET","statusCode":402,"finalUrl":"https://k2so.wrong.systems/api/services/x402-listing-due-diligence-before-first-payment","redirectCount":0,"checkedAt":"2026-08-11T05:32:48.275Z","latencyMs":151,"reason":null,"requirementCount":1},"quote":{"ok":true,"quotedUsd":0.002,"network":"eip155:8453","checkedAt":"2026-08-11T05:32:48.275Z","source":"exact-route"},"paidCall":{"verified":false,"checkedAt":null,"network":null,"receiptReference":null,"outputReviewed":false}},"curation":{"status":"curated","basis":"live-quote","matchScope":null,"listingSlug":null,"providerListingSlug":null,"listingName":null,"kind":null,"categories":[],"editorialDescription":null,"docsUrl":null,"sourceUrl":null}}}