{"uid":"cap_Boj8U2OyKZ6lmJiAZaUJP","slug":"crypto-wallet-balance-lookup-5e263450","name":"Crypto Wallet Balance Lookup","description":"Machine-payable x402 utilities for hashing, Base64, UUID generation, unit and timezone conversion, realtime crypto market data, webpage/document extraction, URL-to-Markdown, metadata, RAG ingestion and deterministic website change detection.","url":"https://x402-gateway-production-1f21.up.railway.app/crypto-wallet-balance?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"tokens":{"type":"string","description":"Optional comma-separated ERC-20 contract addresses."},"address":{"type":"string","pattern":"^0x[a-fA-F0-9]{40}$"},"network":{"enum":["base","ethereum"],"type":"string","default":"base"}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"status":"ready"}},"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_ar3grHDNgPlJHlq7wv3EI","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":"Fetches the native and ERC-20 token balances for a given Ethereum or Base wallet address","exampleAgentPrompt":"What's the current balance of wallet 0xAbCd1234...5678 on Base — including any ERC-20 tokens at contract addresses 0xTokenA and 0xTokenB?","exampleUseCases":[{"title":"Portfolio snapshot for DeFi wallet","prompt":"Pull all the token balances for my wallet 0x1234567890abcdef1234567890abcdef12345678 on Base, including ERC-20s at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 and 0x6B175474E89094C44Da98b954EedeAC495271d0F."},{"title":"Pre-transaction balance check","prompt":"Before I send tokens, check the balance of 0xAbCd1234567890AbCd1234567890AbCd12345678 on Ethereum to make sure it has enough ETH and USDC."},{"title":"Monitor a tracked address on Base","prompt":"Check the current native and ERC-20 balances for wallet 0xDEADbEEf00000000000000000000000000000000 on the Base network — I want to see everything it's holding right now."}],"resultDescription":"Returns a JSON object with the native token balance and, if ERC-20 contract addresses were supplied, the balance of each specified token for the given wallet address on the requested network (Base or Ethereum).","failureModes":["Invalid or malformed wallet address (not a valid 0x... Ethereum address) returns an error","Unsupported network value (not 'base' or 'ethereum') returns a validation error","Invalid ERC-20 contract address in tokens list may cause partial or failed response","Payment not fulfilled causes a 402 Payment Required response","Network RPC timeouts or node unavailability may cause delayed or failed responses"],"whenToPreferThis":"Use this endpoint when you need a quick, pay-per-call on-chain balance lookup for any Ethereum or Base wallet without setting up your own RPC node or Web3 infrastructure. It's ideal for AI agents that need real-time token balance data as part of a broader workflow (e.g. portfolio checks, pre-transaction validation, or monitoring), especially when the x402 micropayment model fits the usage pattern better than a subscription-based blockchain data provider.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T00:43:51.783Z","isFirstParty":false,"canonicalSlug":"crypto-wallet-balance-lookup-5e263450"}