{"uid":"cap_UFot1STL1K70bmYBb8QdD","slug":"counterpartycheck-by-agentgate-0d497a5b","name":"CounterpartyCheck by AgentGate","description":"Crypto address risk check API (pre-payment counterparty screening). Pre-payment counterparty check for agents: before paying or approving an EVM (Base, Ethereum, Polygon, Arbitrum) or Solana address, get ok / caution / block with reasons. Screens OFAC SDN and ScamSniffer scam lists, x402 Bazaar payee directory and known labels, and reads the address on-chain (wallet, contract, token contract, Safe, EIP-7702 delegation, activity, USDC balance).","url":"https://api.youraitools.co/counterpartycheck/v1/lite?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"chain":{"enum":["base","ethereum","polygon","arbitrum","solana"],"type":"string","description":"Chain of the payment (default base; a base58 address implies solana)"},"intent":{"enum":["pay","approve","interact"],"type":"string","description":"What you are about to do (default pay): changes which signals matter, e.g. paying a token contract or approving an EOA"},"address":{"type":"string","description":"Counterparty address: EVM 0x + 40 hex, or a Solana base58 address"}},"description":"Search intents: crypto address risk check, wallet risk score, scam address check, counterparty screening, ofac wallet check, pre payment check"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"tier":{"type":"string"},"chain":{"type":"string"},"facts":{"type":"object"},"intent":{"type":"string"},"address":{"type":"string"},"reasons":{"type":"array"},"summary":{"type":"string"},"verdict":{"type":"string"},"confidence":{"type":"string"}}}}}}},"responseSchema":{"type":"json","example":{"tier":"lite","chain":"ethereum","facts":{"kind":"eoa","nonce":38,"usdc_balance":0,"native_balance":101.8},"intent":"pay","address":"0x098b716b8aaf21512996dc57eb0615e2383e2f96","reasons":[{"code":"ofac_sdn","text":"Listed on the US Treasury OFAC SDN list (LAZARUS GROUP, DPRK3). Do not pay or interact.","severity":"danger"},{"code":"active","text":"Active wallet: 38 outgoing transaction(s) on Ethereum.","severity":"good"}],"summary":"BLOCK: Listed on the US Treasury OFAC SDN list (LAZARUS GROUP, DPRK3). Do not pay or interact.","verdict":"block","confidence":"high"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_hc3alcBF6WOnktblfxAwX","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Screens an EVM or Solana address before payment or interaction, returning a verdict of ok/caution/block with OFAC SDN, scam list, on-chain, and label-based reasons.","exampleAgentPrompt":"Before I send USDC to 0x098b716b8aaf21512996dc57eb0615e2383e2f96 on Ethereum, run a counterparty check and tell me if it's safe — I need to know if it's on any sanctions or scam lists and what kind of address it is.","exampleUseCases":[{"title":"Sanctions check before agent payment","prompt":"I'm about to pay 50 USDC to 0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD on Base — can you check whether that address is sanctioned or flagged as a scam before you send it?"},{"title":"Contract approval risk screening","prompt":"I want to approve the contract at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Ethereum to spend my tokens — screen it first and tell me if it's a legitimate token contract or something risky."},{"title":"Solana payee verification","prompt":"Check if the Solana address 5tzFkiKscfRcs6nrqFMCkidBpeVFSJVvHrBqXnv1g7MR is trustworthy before I pay it — is it on any scam lists and what does the on-chain activity look like?"}],"resultDescription":"A JSON object with a verdict field (ok, caution, or block), a confidence level (high/medium/low), a human-readable summary, an array of reasons each with a code, severity, and explanatory text, plus on-chain facts including address kind (eoa, contract, token, Safe, etc.), nonce, native balance, and USDC balance. Chain and intent are echoed back for confirmation.","failureModes":["Invalid address format returns an error (non-hex EVM or malformed base58 Solana)","Unsupported chain returns a validation error","Address not yet on-chain may return limited facts with lower confidence","OFAC or scam list data temporarily unavailable may reduce confidence or return partial results","Rate limiting or payment failure returns 402 or 429 responses"],"whenToPreferThis":"Choose this endpoint when an AI agent is about to execute or approve a crypto payment and needs a fast, multi-signal risk verdict combining OFAC SDN sanctions screening, ScamSniffer scam lists, on-chain activity analysis, and known address labels in a single call. Prefer it over a pure sanctions-only check (like PayGuard) when you also want on-chain context such as address type, activity, and USDC balance. It supports EVM chains (Base, Ethereum, Polygon, Arbitrum) and Solana, making it a broad pre-payment safety gate for autonomous agents operating across chains.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-26T06:41:55.879Z","isFirstParty":false,"canonicalSlug":"counterpartycheck-by-agentgate-0d497a5b"}