{"uid":"cap_JDOSGPjHdqXCrKHA5hBqV","slug":"counterparty-address-check-88f8bcb9","name":"Counterparty Address Check","description":"Given a Base address, check ETH/USDC balance, transaction activity, and contract status, with a low-risk/review/caution verdict for pre-payment counterparty screening.","url":"https://k2so.wrong.systems/api/services/counterparty-address-check","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"meta":{"enum":["0","1"],"type":"string","description":"Set to 1 for free metadata JSON (no payment required)"},"address":{"type":"string","description":"Composite input parameter"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","title":"Counterparty Address Check paid response","$schema":"https://json-schema.org/draft/2020-12/schema","required":["ok","paid","service","provider","result"],"properties":{"ok":{"type":"boolean"},"paid":{"type":"boolean"},"result":{"type":"object","required":["ok","service"],"properties":{"ok":{"type":"boolean","description":"Handler success"},"score":{"type":"number"},"service":{"type":"string","description":"Service slug"},"summary":{"type":"string"},"evidence":{"type":"object"},"strengths":{"type":"array","items":{"type":"string"}},"confidence":{"type":"string"},"generatedAt":{"type":"string","description":"ISO-8601 timestamp"},"riskFactors":{"type":"array","items":{"type":"string"}}}},"payment":{"type":"object","properties":{"code":{"type":"string"},"payer":{"type":"string"},"detail":{"type":"string"},"selfPay":{"type":"boolean"},"transaction":{"type":"string"}}},"service":{"type":"string"},"provider":{"type":"string","const":"K-2SO"}}}}}}},"responseSchema":{"type":"json","example":{"ok":true,"paid":true,"result":{"ok":true,"service":"counterparty-address-check"},"service":"counterparty-address-check","provider":"K-2SO"}},"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_Qh7gSc9U83uEc8w59xNdn","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":"Screens a Base blockchain address for ETH/USDC balance, transaction history, and contract status, returning a low-risk/review/caution verdict for pre-payment due diligence.","exampleAgentPrompt":"Before I send 500 USDC to 0x4f3edf983ac636a65a842ce7c78d9aa706d3b113 on Base, can you screen that address for counterparty risk and tell me if it's low-risk, needs review, or is a caution?","exampleUseCases":[{"title":"Pre-payment wallet risk check","prompt":"I'm about to pay a freelancer 200 USDC on Base — can you screen their address 0xAbC123...def456 first and tell me if it looks safe or if I should be worried?"},{"title":"Screening unknown DeFi contract","prompt":"I got sent a Base contract address to interact with for a yield farming deal — can you check 0x9d8f8572f345 for red flags before I send anything to it?"},{"title":"Vendor onboarding counterparty review","prompt":"We're onboarding a new crypto payment vendor and they gave us a Base address. Run a counterparty check on 0x1a2b3c4d5e6f and give me their risk verdict and any evidence of suspicious activity."}],"resultDescription":"Returns a structured JSON object with: a boolean success flag, a risk score (numeric), a verdict summary string, a confidence label, an array of risk factors, an array of strengths, an evidence object with underlying on-chain data (balances, transaction activity, contract status), and a generatedAt ISO-8601 timestamp. The paid flag confirms payment was processed.","failureModes":["Invalid or malformed Base address returns an error or ok:false","Address not found on Base network may yield low-confidence results","Network or RPC provider unavailability causes handler failure","Payment not completed results in 402 response rather than verdict","Newly created addresses with no history may return inconclusive confidence"],"whenToPreferThis":"Choose this endpoint when you need a fast, structured risk verdict on a specific Base blockchain address before sending a payment — particularly when you want a combined signal from balance levels, transaction history, and contract status in a single call. Prefer it over manual on-chain lookups when you need a machine-readable low/review/caution classification with supporting evidence for automated decision-making in agent workflows.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:46:17.551Z","isFirstParty":false}