{"uid":"cap_Y15MppE-68a2Urt4dsf2X","slug":"erc-20-token-balance-lookup-base-ethereum-7d7278c4","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://webthree.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_gW4SXY35zIniUS0eSChwl","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":"Looks up the ERC-20 token balance for a given wallet address on Base or Ethereum, returning human-readable and raw balance values.","exampleAgentPrompt":"What's the USDC balance of wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base — use the USDC contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913?","exampleUseCases":[{"title":"DeFi portfolio balance check","prompt":"Can you check how much USDC the wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 holds on Base using the USDC contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913?"},{"title":"On-chain payment eligibility verification","prompt":"Before we proceed, check if the address 0xAbc123...def has at least some balance of the governance token at contract 0xTokenAddress... on Ethereum — just need the current balance."},{"title":"Automated treasury monitoring alert","prompt":"Check the USDC balance on Base for our treasury wallet 0xTreasury... using contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 so I can see if we're running low."}],"resultDescription":"Returns a JSON object with the wallet's token balance as a human-readable decimal string (e.g. '12.5'), the raw integer balance, the token symbol (e.g. 'USDC'), and the number of decimals used by the contract.","failureModes":["Invalid or malformed EVM address returns an error","Unsupported chain value (must be 'base' or 'ethereum') returns a validation error","Invalid ERC-20 contract address (not a real token contract) may return zero or an error","Network/RPC unavailability causes a timeout or 5xx response","Missing required query parameters (chain, token, address) results in a 400 error"],"whenToPreferThis":"Use this endpoint when you need a quick, no-account-required ERC-20 token balance lookup on Base or Ethereum mainnet, paid per call via USDC over x402. Prefer it for lightweight agent workflows that need on-chain balance data without maintaining a Web3 node or API key subscription.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-22T06:31:35.749Z","isFirstParty":false,"canonicalSlug":"erc-20-token-balance-lookup-base-ethereum-7d7278c4"}