{"uid":"cap_doCCZ00UtwGUFH-OpcFPF","slug":"erc-20-token-balance-lookup-b4c80747","name":"ERC-20 Token Balance Lookup","description":"Pay-per-call EVM chain data for agents: wallet snapshots, ERC-20 token profiles, spot prices, gas markets, transaction decode, and ENS resolution across major EVM chains (base, ethereum, arbitrum, optimism, polygon). Deterministic JSON, no RPC keys or node infra needed.","url":"https://chain.cyberwarex.com/erc20-balance?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"chain":{"enum":["base","ethereum","arbitrum","optimism","polygon"],"type":"string","default":"base","description":"EVM chain to query."},"token":{"type":"string","pattern":"^0x[a-fA-F0-9]{40}$","description":"ERC-20 contract address (default: the chain's USDC)."},"address":{"type":"string","pattern":"^0x[a-fA-F0-9]{40}$","description":"Wallet address to read."}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"raw":{"type":"string"},"chain":{"type":"string"},"token":{"type":"string"},"symbol":{"type":["string","null"]},"address":{"type":"string"},"balance":{"type":["number","null"]},"decimals":{"type":["integer","null"]}}}}}}},"responseSchema":{"type":"json","example":{"raw":"250400000","chain":"base","token":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","symbol":"USDC","address":"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045","balance":250.4,"decimals":6}},"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_i-z5fopkVEBlJdsUPO3Fz","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":"Returns the ERC-20 token balance for a wallet address on a specified EVM chain, including raw amount, human-readable balance, symbol, and decimals.","exampleAgentPrompt":"What's the USDC balance for wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base right now?","exampleUseCases":[{"title":"Verify wallet funding before DeFi action","prompt":"Before I swap tokens, check whether 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 has at least 500 USDC on Base — look up the USDC contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913."},{"title":"Portfolio balance check across wallets","prompt":"What's the USDT balance on Polygon for wallet 0xAbCd1234567890AbCd1234567890AbCd12345678? Use the standard USDT contract on Polygon."},{"title":"Confirm airdrop token receipt","prompt":"Check if wallet 0x1234567890abcdef1234567890abcdef12345678 has received any of the airdrop token at contract 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Ethereum yet."}],"resultDescription":"A JSON object containing: the human-readable token balance (balance), raw on-chain amount (raw), token symbol (symbol), decimals, the queried wallet address, the ERC-20 contract address (token), and the chain name. Example: {raw: '250400000', chain: 'base', token: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913', symbol: 'USDC', address: '0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045', balance: 250.4, decimals: 6}.","failureModes":["Invalid wallet address format (not a valid 0x hex address) — likely 400 error","Invalid ERC-20 contract address — may return null balance or symbol","Unsupported chain name (outside base, ethereum, arbitrum, optimism, polygon) — validation error","Payment failure or insufficient USDC for the $0.001 per-call fee — 402 Payment Required","Contract address is not an ERC-20 token — may return null for symbol/decimals","Network congestion causing delayed on-chain read — slow or timeout response"],"whenToPreferThis":"Use this endpoint when you need a quick, keyless, pay-per-call ERC-20 balance lookup on a supported EVM chain without managing RPC infrastructure. Prefer this over direct RPC calls when you don't have node access or want deterministic JSON output. Choose this over a full wallet snapshot endpoint when you only need one specific token balance rather than the entire portfolio.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T06:38:37.126Z","isFirstParty":false,"canonicalSlug":"erc-20-token-balance-lookup-b4c80747"}