{"uid":"cap_Z6VL6Zwc3Huod-JGtbG53","slug":"x402-base-tools-address-profile-lookup-6905348c","name":"x402 Base Tools – Address Profile Lookup","description":"Base mainnet data for agents, read live from the chain and paid per call in USDC: gas prices and costs, token prices from Uniswap and Aerodrome pools, balances, token info, transaction decoding, x402 payment checks, EIP-3009 authorization status, Basenames and address profiles. Lookups of things that do not exist are not charged.","url":"https://wt7tysfcmjm8fpzl.68r.lambda-web.us-east-1.on.aws/v1/address?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":{"address":{"type":"string","description":"the address (0x...)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"eth":{},"type":{},"usdc":{},"token":{},"basename":{},"x402_seller":{},"transactions":{}}}}}}},"responseSchema":{"type":"json","example":{"eth":"0.001","type":"eoa","usdc":"8.98","token":null,"basename":null,"x402_seller":{"origins":["https://..."],"listings":28},"transactions":3}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_G3CFtgMqts-y-UjbZIRNl","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Retrieves a live on-chain profile for a Base mainnet address including ETH/USDC balances, type, Basename, token holdings, x402 seller status, and recent transaction count.","exampleAgentPrompt":"Can you pull up the full on-chain profile for Base address 0x1234...abcd — I want to know their ETH and USDC balances, whether it's a wallet or contract, their Basename if they have one, and whether they're an x402 seller?","exampleUseCases":[{"title":"Verify wallet before sending payment","prompt":"Before I send funds, can you check the profile for 0xABCD...1234 on Base? I want to confirm it's a real wallet, see their current ETH and USDC balances, and find out if they have a Basename."},{"title":"Identify x402 seller reputation","prompt":"I want to know if 0x9876...fedc is an x402 seller on Base — how many listings do they have, what origins do they operate from, and what's their recent transaction activity?"},{"title":"Resolve Basename to address details","prompt":"I have the address 0x5555...aaaa on Base — can you tell me if it has a Basename registered and what token balances it's currently holding?"}],"resultDescription":"Returns a JSON object with: ETH balance (string, e.g. '0.001'), USDC balance (string, e.g. '8.98'), account type ('eoa' or contract type), token info (null if none), Basename (null if unregistered), x402_seller object (with origins array and listing count, if applicable), and recent transaction count. Non-existent addresses are not charged.","failureModes":["Invalid address format returns an error (not charged)","Address does not exist on Base — returns empty/null fields, not charged","RPC or chain data temporarily unavailable — may return 5xx","Payment failure (insufficient USDC or x402 auth) blocks the request","Rate limiting if called in rapid succession without valid payment"],"whenToPreferThis":"Use this endpoint when you need a comprehensive, live on-chain snapshot of a Base mainnet address — combining balance, identity (Basename), account type, x402 seller status, and activity — in a single paid-per-call lookup. Prefer this over separate RPC calls when you want enriched metadata (Basename, x402 seller info) beyond raw chain data, and when operating in an agent context where micropayment-per-call (USDC via x402) is acceptable.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T12:32:59.015Z","isFirstParty":false,"canonicalSlug":"x402-base-tools-address-profile-lookup-6905348c"}