{"uid":"cap_84HDqbXq5ucwgRmo6JLGo","slug":"erc-20-token-balance-lookup-base-ethereum-f37e0265","name":"ERC-20 Token Balance Lookup (Base/Ethereum)","description":"Pay-per-call website uptime/latency/TLS checks and fetch-to-Markdown, measured from Hub Europe (Germany). USDC on Base via x402. No account or API key.","url":"https://bluebirds.ccwu.cc:8443/v1/chain/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"],"type":"string"},"queryParams":{"type":"object","required":["chain","token","address"],"properties":{"chain":{"type":"string","example":"base","description":"base or ethereum"},"token":{"type":"string","example":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","description":"ERC-20 contract address"},"address":{"type":"string","example":"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045","description":"0x EVM address"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"raw":"12500000","symbol":"USDC","balance":"12.5","decimals":6}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm__QATus9heFdQZAmnLShr_","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches the current ERC-20 token balance for a given wallet address on Base or Ethereum, returning raw amount, formatted balance, symbol, and decimals.","exampleAgentPrompt":"What's the current USDC balance for the wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base? The USDC contract address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","exampleUseCases":[{"title":"Check portfolio USDC balance on Base","prompt":"How much USDC does the wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 currently hold on Base? Use the USDC contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913."},{"title":"Verify payment received before order fulfillment","prompt":"Before I ship the order, can you confirm that wallet 0xAbCd1234...5678 has received at least 50 USDC on Ethereum? The USDC contract is 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48."},{"title":"Monitor treasury token balance for reporting","prompt":"What is the current DAI balance of our treasury wallet 0x1234...abcd on Ethereum? DAI contract is 0x6B175474E89094C44Da98b954EedeAC495271d0F — I need the formatted number for our weekly report."}],"resultDescription":"Returns a JSON object containing: the raw token balance as an integer string (e.g. '12500000'), the formatted human-readable balance (e.g. '12.5'), the token symbol (e.g. 'USDC'), and the number of decimals used by the token contract (e.g. 6).","failureModes":["Invalid EVM address format returns an error","Unsupported chain value (not 'base' or 'ethereum') causes rejection","Invalid or non-existent ERC-20 contract address returns an error or zero balance","Network connectivity issues to the blockchain RPC may cause timeouts","Payment of 0.002 USDC via x402 required; missing payment returns HTTP 402"],"whenToPreferThis":"Choose this endpoint when you need a quick, pay-per-call ERC-20 token balance lookup on Base or Ethereum without setting up an API key or account. It is ideal for agents that only occasionally need on-chain balance data and want a serverless, no-registration path. It returns both raw and formatted balances in a single call, saving downstream formatting work.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T06:42:24.528Z","isFirstParty":false,"canonicalSlug":"erc-20-token-balance-lookup-base-ethereum-f37e0265"}