{"uid":"cap_jhRIVE2eQXJIsGFYKSxU5","slug":"x402-merchant-audit-57f2ce0c","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/verify-merchant","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_rG7B7GsvC1Tpm8aE5QKp2","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 reachability, detecting price drift, checking settlement history, and verifying on-chain payment flows.","exampleAgentPrompt":"Before I pay for it, audit the x402 merchant at https://some-api.example.com/data-endpoint — I want to know if it's reachable, actually emits 402, has real settlement history, and whether the price has been drifting.","exampleUseCases":[{"title":"Pre-payment safety check on unknown API","prompt":"I found this x402 API at https://data-provider.xyz/premium-feed and I want to use it in my agent — can you audit it first and tell me if it's safe to pay and whether anyone else has actually paid it successfully?"},{"title":"Detect price manipulation before subscription","prompt":"Can you check https://weather-api.someservice.io/forecast for price drift? I've noticed x402 endpoints sometimes change their prices and I want to confirm the cost is stable before I commit to calling it regularly."},{"title":"On-chain verification of a merchant's legitimacy","prompt":"Run an audit on https://ml-inference.aivendor.com/predict — I specifically want to see the on-chain USDC inflow and settlement history to confirm this isn't just a listed merchant with zero real transactions."}],"resultDescription":"Returns a JSON object with a top-level verdict (e.g. CAUTION, SAFE, RISKY), a set of boolean/numeric checks (reachable, emits_402, has_buyers, price_drift, onchain_inflow_usdc), and an array of human-readable reason strings explaining the verdict.","failureModes":["Target URL is unreachable — reachable flag set to false, verdict likely CAUTION or RISKY","Target does not emit HTTP 402 — emits_402 false, may indicate misconfigured or non-x402 endpoint","No on-chain settlement data found — onchain_inflow_usdc returns 0, has_buyers false","Invalid or non-HTTPS target URL — request rejected with validation error","Merchant-audit service itself is temporarily unavailable — Cloudflare Worker error response"],"whenToPreferThis":"Use this endpoint when an AI agent or user is about to pay an x402 merchant and needs pre-flight verification of legitimacy, price stability, and real usage history. Prefer this over generic HTTP probes when you specifically need x402-aware checks like 402 emission detection, on-chain USDC settlement verification, and price drift analysis — capabilities no standard health-check or uptime monitor provides.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:39:54.571Z","isFirstParty":false}