{"uid":"cap_JC_CqPqUcNRuFYaOQD3HC","slug":"horizon-pulse-seller-due-diligence-for-x402-endpoints-03c5fe5d","name":"Horizon Pulse Seller Due-Diligence for x402 Endpoints","description":"Seller due-diligence for one x402 endpoint. We make a real capped test payment, check the paid response against the listed schema, compare payTo with the CDP listing, read a recent window of on-chain USDC payments to the payTo and screen for lookalike addresses. Returns a signed JSON verdict of evidenced facts. No charge unless the test payment and all 4 other checks complete. Facts, not endorsement; no warranty. Not affiliated with the seller checked. $5.","url":"https://horizonpulse.dev/api/seller-dd/single?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"resource":{"type":"string","format":"uri","maxLength":2048,"description":"https URL of the x402 endpoint to check (required)."},"expected_payTo":{"type":["string","null"],"description":"Optional EVM address to compare with the endpoint's payTo."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"5","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":"$5/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"5","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"5","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_siRNSBPU82_6LsHGRW7FM","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"5","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Runs a 5-check due-diligence audit on a single x402 endpoint — including a real capped test payment — and returns a signed JSON verdict of evidenced facts about the seller.","exampleAgentPrompt":"Before I integrate this x402 API at https://api.example.com/data, can you run a full seller due-diligence check on it — make the test payment, validate the response schema, and confirm the payTo address matches 0xAbC123...?","exampleUseCases":[{"title":"Pre-integration x402 fraud screen","prompt":"I'm about to pay for and integrate the x402 endpoint at https://market.someapi.dev/premium — can you run a due-diligence check on it, confirm the payTo address is 0x1234abcd5678ef00, and tell me if anything looks sketchy before I commit?"},{"title":"Verifying a newly listed Bazaar seller","prompt":"There's a new x402 seller listed on Bazaar at https://newprovider.xyz/api/feed — can you do a full seller audit on them, including checking on-chain USDC payments and screening for lookalike addresses?"},{"title":"Automated x402 vendor vetting pipeline","prompt":"Before my agent fleet starts using https://databroker.io/x402/prices, run the seller due-diligence check on it and flag me if the payTo address doesn't match what's in the CDP listing or if there are any lookalike address warnings."}],"resultDescription":"A signed JSON verdict containing evidenced facts from five checks: (1) result of a real capped test payment, (2) comparison of the paid response against the endpoint's declared schema, (3) comparison of the payTo address with the CDP Bazaar listing, (4) a recent window of on-chain USDC payment history to the payTo, and (5) lookalike address screening results. The verdict is cryptographically signed and states facts without warranty or endorsement.","failureModes":["Test payment fails — charge not incurred, no verdict returned","Endpoint URL is unreachable or returns non-x402 response — validation cannot proceed","payTo address in endpoint response is missing or malformed — schema check fails","CDP Bazaar lookup returns no listing for the seller — comparison step incomplete","On-chain data unavailable for the payTo address — USDC history check skipped","All 5 checks must complete for billing to occur — partial runs are not charged"],"whenToPreferThis":"Use this endpoint when you need cryptographically evidenced, multi-factor due diligence on an x402 endpoint before integrating or paying it — especially when you want to screen for lookalike wallet address fraud, validate schema compliance with an actual test payment, or cross-reference the payTo with Coinbase CDP Bazaar. Prefer this over manual inspection or single-factor checks when the stakes of integrating a fraudulent or misconfigured x402 seller are meaningful.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-30T06:44:14.010Z","isFirstParty":false,"canonicalSlug":"horizon-pulse-seller-due-diligence-for-x402-endpoints-03c5fe5d"}