{"uid":"cap_wi8VMPtDOJfGqK9efLBfi","slug":"x402-merchant-audit-31c513ab","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/x402-endpoint-verify","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_trsgs3CkfWtjtSgf3_8dn","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 API endpoint before payment by live-probing it, checking settlement history, price drift, and on-chain USDC inflow.","exampleAgentPrompt":"Before I pay it, can you audit the x402 endpoint at https://some-merchant.com/api/data — check if it's reachable, actually emitting 402s, has any real settlement history, and flag any price drift?","exampleUseCases":[{"title":"Pre-payment safety check","prompt":"I'm about to send USDC to this x402 endpoint at https://inference-api.example.com/v1/generate — can you audit it first and tell me if it's safe to pay, has real buyers, and whether the price has been drifting?"},{"title":"Detecting ghost listings","prompt":"Can you check whether https://data-feed.somesite.io/premium has actually had any settlements in the last 30 days or if it's just listed with no real activity? I don't want to pay for a dead endpoint."},{"title":"On-chain verification of a new merchant","prompt":"I found this paid API at https://new-merchant.xyz/api/weather — can you verify it's actually a legitimate x402 merchant by checking its on-chain USDC inflow and whether it correctly returns 402 responses?"}],"resultDescription":"Returns a JSON object with a verdict (e.g. CAUTION, OK), a set of boolean checks (reachable, emits_402, has_buyers, price_drift) and a numeric on-chain USDC inflow figure, plus a human-readable list of reasons explaining the verdict.","failureModes":["Target URL is unreachable or returns non-402 errors — reachable flag set to false","Merchant has no on-chain settlement history — has_buyers false, verdict may be CAUTION","Price drift detected — price_drift flag true and flagged in reasons","Invalid or non-HTTPS target URL provided — request rejected","Target is reachable but never emits 402 — emits_402 false, likely not a valid x402 endpoint"],"whenToPreferThis":"Use this endpoint whenever an AI agent is about to make a payment to an unknown or untrusted x402 merchant URL and needs a safety check first. It is specifically designed for the x402 HTTP payment protocol and provides on-chain verification that generic URL checkers or uptime monitors cannot offer. Prefer this over manual inspection when you need settlement history, price drift detection, and on-chain USDC data in a single call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:30:36.362Z","isFirstParty":false}