{"uid":"cap_eR1Kb3KiuhkLqxUQ_SJWi","slug":"erc-20-token-balance-lookup-base-ethereum-29e6906d","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://funday520.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_hZJL8KLT45c_n99SXcFGm","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 ERC-20 token balance of any EVM wallet address on Base or Ethereum, returning human-readable balance, raw amount, symbol, and decimals.","exampleAgentPrompt":"What's the USDC balance (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) for wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base?","exampleUseCases":[{"title":"DeFi portfolio balance check","prompt":"Can you check how much USDC the wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 holds on Base? The USDC contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913."},{"title":"Pre-payment eligibility verification","prompt":"Before I trigger a payment, verify that wallet 0xAbc123...def456 has at least 50 USDC on Base — the USDC contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913."},{"title":"Token airdrop recipient audit","prompt":"I need to audit which addresses in my list actually hold our token (contract 0x6B175474E89094C44Da98b954EedeAC495271d0F on Ethereum) — start by checking wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045."}],"resultDescription":"Returns a JSON object with four fields: 'balance' (human-readable float string, e.g. '12.5'), 'raw' (raw integer amount as string, e.g. '12500000'), 'symbol' (token ticker, e.g. 'USDC'), and 'decimals' (integer indicating token precision, e.g. 6).","failureModes":["Invalid or malformed EVM address returns an error or empty result","Unsupported chain identifier (anything other than 'base' or 'ethereum') causes a validation error","Invalid ERC-20 contract address (e.g. EOA instead of token contract) may return zero or error","Network/RPC timeout for the target chain returns a connectivity error","Payment failure via x402/USDC blocks the request before execution"],"whenToPreferThis":"Use this endpoint when you need a no-account, pay-per-call ERC-20 balance lookup on Base or Ethereum without setting up API keys or managing credentials. It is ideal for agents that need occasional or ad-hoc token balance checks, especially in USDC on Base, and supports both human-readable and raw balance values in a single call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-27T06:44:25.066Z","isFirstParty":false,"canonicalSlug":"erc-20-token-balance-lookup-base-ethereum-29e6906d"}