{"uid":"cap_e3ecIK426DtAt9K7IEZ1X","slug":"quack-ai-q402-agent-trust-check-39a66958","name":"Quack AI Q402 Agent Trust Check","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","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_a3b4c5d6e7f8a9b0c1d2e3f4","priceUsdc":0.02,"riskFlags":[{"flag":"no_8004_identity","evidence":"ERC-8004 IdentityRegistry queried on BSC (0x8004A169FB4a3325136EB29fA0ceB6D2e539a432) and Base — balanceOf returned 0","severity":"low"}],"reputation":null,"onChainActivity":{"source":"Base mainnet eth_getTransactionCount (public RPC; scan window 900 blocks ≈ 30 min)","txCountBucket":"10-49","recentActivityDetected":true,"recentActivityWindowBlocks":900}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/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_NqjFUNGgR1koEtYiQeCyQ","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":"Looks up the trust profile and on-chain reputation of an EVM wallet address, returning risk flags, ERC-8004 identity registration status, and recent transaction activity.","exampleAgentPrompt":"Can you check the trust profile and risk flags for the wallet address 0x70997970C51812dc3A010C7d01b50e0d17dc79C8 before I send payment — I want to know if it has an ERC-8004 identity and any recent on-chain activity on Base?","exampleUseCases":[{"title":"Pre-payment wallet risk screening","prompt":"Before I release payment to 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B, can you check their trust profile — specifically any risk flags and whether they're registered with ERC-8004 identity on Base or BSC?"},{"title":"Agent-to-agent trust verification","prompt":"My AI agent is about to interact with another agent at wallet 0x3C44CdDdB6a900fa2b585dd299e03d12FA4293BC — can you pull their Q402 trust score and tell me if they've been active on-chain recently?"},{"title":"New user onboarding identity check","prompt":"A new user wants to join our platform with wallet 0x90F79bf6EB2c4f870365E785982E1f101E93b906 — can you check if they have an ERC-8004 identity registered and flag any risk signals so I know whether to trust them?"}],"resultDescription":"Returns a JSON object containing: the wallet address, payment timestamp, a receipt ID, the USDC price charged, ERC-8004 identity registration status and registration list from BSC and Base, recent on-chain transaction activity bucket (e.g. 10-49 txns in last 900 blocks), whether recent activity was detected, and an array of risk flags each with a flag name, evidence string, and severity level. Reputation field may be null if no reputation data is available.","failureModes":["Invalid or malformed EVM address returns an error","Address with no on-chain history may return empty activity and null reputation","ERC-8004 registry query failure on BSC or Base returns partial data","Payment failure or insufficient USDC balance prevents the call from completing","Network RPC downtime may cause on-chain activity lookup to fail"],"whenToPreferThis":"Choose this endpoint when you need a fast, pay-per-call trust and identity check for any EVM wallet address, especially when you need ERC-8004 identity registry status combined with on-chain activity signals and risk flags in a single response. Prefer this over building your own on-chain queries when you want a pre-packaged risk assessment without managing RPC connections or gas costs.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-10T00:30:01.926Z","isFirstParty":false}