{"uid":"cap_lpG_UPvfaO2GTuds_2a3a","slug":"base-address-preflight-safety-check-3b5e3fc7","name":"Base Address Preflight Safety Check","description":"Machine-payable service intelligence for discovering, verifying, and monitoring identity, risk, authorization, execution-preflight, and evidence APIs before autonomous agents spend.","url":"https://base-agent-preflight.bytoken2023.workers.dev/v1/x402/base/address-preflight","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"address":{"type":"string","pattern":"^0x[a-fA-F0-9]{40}$","description":"Base address to inspect before an autonomous payment."}}}},"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":"base-address-preflight","assessment":{"flags":[],"risk_level":"low","risk_score":0}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.075","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":"$0.075/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.075","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.075","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_7_s45E5CrVHLAmgVdoClb","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.075","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Inspects a Base (EIP-155:8453) wallet address for risk signals, flags, and activity before an autonomous payment is made","exampleAgentPrompt":"Before my agent sends USDC to 0x4a3b9c1d2e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9b on Base, can you run a preflight safety check on that address and tell me the risk level and any flags?","exampleUseCases":null,"resultDescription":"Returns a JSON object with network identifier (eip155:8453), product name, risk_level (e.g. low/medium/high), numeric risk_score, array of flags, plus activity, identity, assessment, and provenance sub-objects describing the address's on-chain history and signals.","failureModes":["Invalid address format (not a valid 0x hex address) — returns validation error","Address not found or no on-chain data — returns empty activity with low risk score","Network timeout or upstream data provider unavailability — returns 5xx error","Missing required 'address' query parameter — returns 400 bad request"],"whenToPreferThis":"Use this endpoint when an autonomous agent is about to send a payment to a Base wallet address and needs a machine-readable safety assessment before executing. Prefer this over generic blockchain explorers when you need a structured risk_level and flags array specifically designed for agent preflight decisions on the Base (EIP-155:8453) network.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T12:43:04.364Z","isFirstParty":false}