{"uid":"cap_Y7PoIs-CVRpzGirDKo755","slug":"x402-merchant-audit-d054d40e","name":"x402 Merchant Audit","description":"Audit any x402 merchant before you pay it. Live probe, price-drift detection, settlement history and on-chain payment verification.","url":"https://merchant-audit.clankerceo.workers.dev/endpoint-check","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","queryParams"],"properties":{"type":{"enum":["http"],"type":"string"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["target"],"properties":{"target":{"type":"string","description":"Absolute https URL of the x402 resource to audit."}}}}},"output":{"type":"object","required":["type"],"properties":{"type":{"enum":["json"],"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"checks":{"emits_402":true,"reachable":true,"has_buyers":false,"price_drift":false,"onchain_inflow_usdc":0},"target":"https://example-merchant.com/api/some-service","reasons":["listed but no settlements in 30d"],"verdict":"CAUTION"}},"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_M6CCYE3rzkhg38byCzfz4","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":"Audits an x402 paid endpoint before payment by probing liveness, detecting price drift, checking settlement history, and verifying on-chain payments.","exampleAgentPrompt":"Before I pay this x402 endpoint at https://some-merchant.com/api/data, can you audit it first — check if it actually emits 402s, whether anyone has settled payments with it, and whether the price has drifted?","exampleUseCases":[{"title":"Pre-payment safety check for AI agent","prompt":"I'm about to have my agent automatically pay https://api.weatherpro.io/forecast every time it needs data — can you audit that x402 endpoint first and tell me if it's legitimate, whether it has real buyers, and if the price looks stable?"},{"title":"Investigating a suspicious paid API","prompt":"I came across https://data-broker.xyz/premium/records and it's demanding USDC via x402, but I've never heard of them — can you audit it and tell me if it actually processes payments on-chain or if it looks sketchy?"},{"title":"Vetting a new x402 integration before deployment","prompt":"We're planning to integrate https://api.newsfeeds-pro.com/live into our product and it uses x402 — can you run an audit on it to confirm it emits 402 properly, has settlement history in the last 30 days, and hasn't shown any price drift?"}],"resultDescription":"Returns a JSON object with a verdict (e.g. CAUTION, OK, FAIL), a set of boolean checks (reachable, emits_402, has_buyers, price_drift), numeric on-chain USDC inflow, and an array of human-readable reasons explaining the verdict for the audited target URL.","failureModes":["Target URL is unreachable — reachable flag set to false, verdict likely FAIL","Merchant listed but no settlements in 30 days — verdict CAUTION with explanatory reason","Price drift detected — price_drift flag true, verdict may be CAUTION or FAIL","Target does not emit 402 responses — emits_402 false, indicates non-x402 endpoint","Invalid or malformed target URL — may return error or empty checks","On-chain data unavailable or delayed — onchain_inflow_usdc may be 0 even for active merchants"],"whenToPreferThis":"Choose this endpoint when an AI agent or user needs to vet an x402-gated paid API before committing USDC — especially in automated pipelines where the agent pays endpoints autonomously. Prefer this over generic URL checkers because it specifically understands x402 protocol semantics, cross-references on-chain settlement data, and detects price drift unique to micropayment APIs.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:46:04.665Z","isFirstParty":false}