{"uid":"cap_wDE2EvoxJVlBOo5SyL3fH","slug":"402sentinel-x402-counterparty-risk-gate-2e9b7a53","name":"402Sentinel x402 Counterparty Risk Gate","description":"Can my x402 service prove it is trustworthy to buyers? 402Sentinel Verified (opt-in trust badge for sellers): deep-audit a service and, if it passes, issue a signed time-boxed 'verified-organic' credential + list it publicly at /api/verified. POST {payto, resource_url?, claimed_buyers?}. Positive-only - failing audits are returned privately, never published.","url":"https://402sentinel.com/api/verify","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"payto":{"type":"string","description":"0x EVM address of the service/seller to deep-audit."},"resource_url":{"type":"string","description":"Optional canonical URL of the service being verified."},"claimed_buyers":{"type":"integer","description":"Optional number of distinct buyers the service claims, to cross-check against the on-chain graph."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_U0YNWjn5pmBJos_zNgXFb","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Scores an x402 payment counterparty's on-chain settlement behaviour (0-100 risk score) and returns an allow/review/block decision before you pay","exampleAgentPrompt":"Before I pay that x402 API at address 0x6a5e7d954f49712abf3f873f037ec845b7b8c666 on Base for $12 USDC, run a 402Sentinel risk check on it — flag it for review if the score is low or block it if the payment exceeds $50.","exampleUseCases":[{"title":"Automated payment approval for unknown vendors","prompt":"I'm about to pay this solana address for data services, but I don't recognize them. Run a 402Sentinel check first and only let me proceed if the risk score is above 65 or you'd flag it for my review."},{"title":"Block high-value risky counterparties","prompt":"Set up 402Sentinel to automatically block any x402 payment recipients on Base if their risk score drops below 40, especially when I'm trying to send more than $100 USDC in a single transaction."},{"title":"Verify settlement history before micropayments","prompt":"Before my agent makes these recurring small USDC payments to that x402 endpoint, check its on-chain settlement behaviour and settlement maturity — I only want to pay addresses that look established and have clean transaction patterns."}],"resultDescription":"A 0-100 risk score derived purely from on-chain settlement behaviour (address age, facilitator-aware payer diversity, settlement maturity) plus a categorical decision of allow, review, or block, optionally conditioned on the requested payment amount and a minimum confidence threshold.","failureModes":["Unknown or brand-new address with no on-chain history — low confidence score returned, decision may be 'review'","Invalid or malformed payto_address — request rejected with validation error","Network not supported — error if non-Base network specified and not yet supported","Insufficient on-chain data to score confidently — confidence below min_confidence threshold triggers conservative block","Payment for the 402Sentinel call itself fails — no result returned if x402 payment is not fulfilled"],"whenToPreferThis":"Use this endpoint when an AI agent is about to make an x402 micropayment and needs an automated pre-payment risk gate — especially when the counterparty address is unknown, the payment amount is non-trivial, or you want a policy-enforceable allow/review/block decision based purely on on-chain settlement behaviour rather than off-chain reputation.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:31:57.206Z","isFirstParty":false}