{"uid":"cap_qgGTMzTPkC12UfmiGpOF-","slug":"erc-20-token-balance-lookup-base-ethereum-902af5ac","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://gentlepenguin.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_7dJsthisja-usL2wJXv-l","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":"Returns the ERC-20 token balance for a given wallet address on Base or Ethereum, paid per call via x402/USDC.","exampleAgentPrompt":"What's the USDC balance (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) for wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base? I need the human-readable amount and the raw value.","exampleUseCases":[{"title":"DeFi pre-trade balance check","prompt":"Before I execute this swap, check how much USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) is sitting in my wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base."},{"title":"Portfolio token holdings audit","prompt":"I need to know the current WETH balance for address 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B on Ethereum — can you pull the formatted balance and decimals from the chain?"},{"title":"Airdrop eligibility verification","prompt":"Check whether wallet 0x1234567890abcdef1234567890abcdef12345678 holds any of the governance token at contract 0xabcdefabcdefabcdefabcdefabcdefabcdefabcd on Base — tell me the exact balance."}],"resultDescription":"A JSON object containing the raw integer balance (`raw`), human-readable decimal balance (`balance`), token symbol (`symbol`), and the number of decimals (`decimals`) for the queried ERC-20 token and wallet address on the specified chain.","failureModes":["Invalid or malformed EVM address returns an error or zero balance","Unsupported chain value (not 'base' or 'ethereum') may return an error","Invalid ERC-20 contract address (e.g. not a token contract) may return zeroes or an error","Network timeout if the RPC node is slow","Payment failure via x402 if USDC balance is insufficient"],"whenToPreferThis":"Choose this endpoint when you need a quick, no-account ERC-20 balance lookup on Base or Ethereum and can pay per call with USDC via x402. It is ideal for agents that need on-chain token data without provisioning API keys or managing RPC infrastructure, especially for one-off or low-frequency lookups.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-27T06:32:05.962Z","isFirstParty":false,"canonicalSlug":"erc-20-token-balance-lookup-base-ethereum-902af5ac"}