{"uid":"cap_XfCSqejQ8cMbcqD2rldgv","slug":"quack-ai-q402-agent-trust-monitor-e5c5455d","name":"Quack AI Q402 Agent Trust Monitor","description":"Q402 is a gasless payment protocol for EVM chains. Your users pay zero gas. You sponsor it, invisibly and instantly.","url":"https://q402.quackai.ai/api/x402/agent-trust/%7Baddress%7D/monitor","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"paidAt":"2026-08-19T05:00:00.000Z","address":"0x70997970C51812dc3A010C7d01b50e0d17dc79C8","erc8004":{"source":"ERC-8004 IdentityRegistry — BSC (0x8004A169FB4a3325136EB29fA0ceB6D2e539a432) and Base queried","isRegistered":false,"registrations":[]},"receipt":"atx_c5d6e7f8a9b0c1d2e3f4a3b4","priceUsdc":0.15,"reputation":null,"onChainActivity":{"source":"Base mainnet eth_getTransactionCount (public RPC; scan window 900 blocks ≈ 30 min)","txCountBucket":"10-49","recentActivityDetected":false,"recentActivityWindowBlocks":900}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.15","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":"$0.15/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.15","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.15","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Hmb9F80eErGzZLksSjYPk","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.15","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches on-chain reputation, identity registration, and recent activity data for an EVM wallet address to assess its trustworthiness before sponsoring gasless transactions.","exampleAgentPrompt":"Can you check the trust and on-chain reputation for wallet address 0x70997970C51812dc3A010C7d01b50e0d17dc79C8 — I want to know if it's ERC-8004 registered and how active it's been on Base recently before I sponsor its gas?","exampleUseCases":[{"title":"Pre-sponsorship wallet vetting","prompt":"Before I whitelist this wallet 0xAbC123...def for gasless transactions in my dApp, can you pull its agent trust profile — check if it's registered in any identity registry and how many transactions it's had on Base in the last 30 minutes?"},{"title":"Fraud detection for airdrop eligibility","prompt":"I'm running an airdrop and want to filter out low-quality wallets — can you check the on-chain activity and ERC-8004 registration status for 0x3f5CE5FBFe3E9af3971dD833D26bA9b5C936f0bE to see if it looks like a real user?"},{"title":"Agent fleet trust scoring","prompt":"My AI agent just received a request from wallet 0x71C7656EC7ab88b098defB751B7401B5f6d8976F — can you fetch its trust profile from Q402 to see its reputation, recent Base activity, and whether it's identity-registered before I let it proceed?"}],"resultDescription":"Returns a JSON object containing: ERC-8004 identity registration status (checked on BSC and Base), on-chain transaction count bucket for the address (e.g. '10-49'), whether recent activity was detected in the last 900 blocks (~30 min) on Base mainnet, a reputation field (may be null), a payment receipt ID, the price paid in USDC, and the timestamp of the lookup.","failureModes":["Invalid or malformed EVM address returns an error or empty result","Address not found on-chain returns null reputation and empty ERC-8004 registrations","RPC timeout or Base mainnet unavailability may cause incomplete on-chain activity data","Payment failure (insufficient USDC balance) prevents the call from completing","Rate limiting may occur under high call volume"],"whenToPreferThis":"Choose this endpoint when you need to assess the trustworthiness of an EVM wallet address before sponsoring gasless transactions or granting access to on-chain services. It combines ERC-8004 identity registry checks across BSC and Base with recent on-chain activity analysis in a single call, making it ideal for anti-fraud, airdrop eligibility, or agent authorization workflows on EVM chains. Prefer it over generic blockchain explorers when you need structured reputation data with a gas sponsorship context.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:30:22.008Z","isFirstParty":false}