{"uid":"cap_kzs7NLS7EL5oZlgVaaNn_","slug":"signgate-agent-buyer-address-risk-check-8cf7a915","name":"SignGate Agent Buyer Address Risk Check","description":"Pay-per-request identity, risk, authorization, execution-preflight and evidence APIs for autonomous agents.","url":"https://base-agent-preflight.bytoken2023.workers.dev/v1/x402/agent-risk/address-risk","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["chain","address"],"properties":{"chain":{"type":"string","pattern":"^[A-Za-z0-9:_ -]{2,80}$","description":"Chain or network label for the address."},"action":{"type":"string","pattern":"^[A-Za-z0-9_.:-]{2,80}$","description":"Planned agent action, such as payment, approval, onboarding, or call."},"address":{"type":"string","pattern":"^0x[a-fA-F0-9]{40}$","description":"Wallet or contract address to screen."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"network":{"type":"string"},"product":{"type":"string"},"activity":{"type":"object"},"identity":{"type":"object"},"assessment":{"type":"object"},"provenance":{"type":"object"}}}}}}},"responseSchema":{"type":"json","example":{"network":"eip155:8453","product":"address-risk","assessment":{"flags":[],"risk_level":"low","risk_score":0}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"down","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ThvTXJJPqnWAkW25q-pl_","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Screens a blockchain wallet address for risk level before an AI agent proceeds with an x402 micropayment purchase","exampleAgentPrompt":"Before my agent pays for that x402 API, can you run a risk check on the buyer wallet address 0xAbC1234567890abcdef1234567890abcdef123456 on the Base network to make sure it's not flagged?","exampleUseCases":[{"title":"Pre-purchase wallet screening for AI agent","prompt":"My autonomous agent is about to buy a data feed using x402 on Base — can you check whether the buyer wallet 0x1234567890abcdef1234567890abcdef12345678 is low-risk before it sends the payment?"},{"title":"Compliance gate before agent API onboarding","prompt":"Before we allow the agent with wallet 0xDeAdBeEf1234567890abcdef1234567890abcdef to onboard and pay for a sensitive dataset on eip155:8453, run an address risk assessment and tell me the risk score and any flags."},{"title":"Approval policy enforcement for high-value agent spend","prompt":"My agent is attempting a payment action with wallet 0xaabbccddeeff00112233445566778899aabbccdd on Base — check if this address passes our risk threshold so I can decide whether to approve the spend."}],"resultDescription":"Returns a JSON object with the network identifier (e.g. 'eip155:8453'), product name ('address-risk'), and an assessment object containing: risk_level (e.g. 'low', 'medium', 'high'), numeric risk_score (0–100), and a flags array listing any specific risk signals detected. May also include identity, activity, and provenance sub-objects for additional context.","failureModes":["Invalid address format (not a 0x hex address of 40 chars) returns a validation error","Unsupported or unrecognized chain label may return empty or error response","Missing required query params (chain or address) returns 400-level error","Address not found on-chain may return low score with no data rather than an error","Service unavailability from Cloudflare Workers results in 5xx with no assessment"],"whenToPreferThis":"Use this endpoint when an AI agent is about to execute an x402 micropayment and you need a fast, pre-transaction risk gate specifically designed for agent buyer governance. Prefer this over generic blockchain analytics when you need a simple pass/fail risk score with flags tailored to the x402 purchase context (APIs, datasets, tools). It is particularly useful for autonomous agent pipelines that need lightweight, cheap ($0.01 USDC) compliance checks without heavy KYC infrastructure.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T16:27:34.369Z","isFirstParty":false}