{"uid":"cap_omj3_om4TNoHUEly01N6j","slug":"erc-20-token-balance-lookup-base-ethereum-e15a4d6e","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://tpgoose.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_gxLs62ozwZoZ_oMzNxmnp","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, including raw amount, symbol, and human-readable balance with decimals.","exampleAgentPrompt":"What's the USDC balance of wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base? The USDC contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","exampleUseCases":[{"title":"Verify payment eligibility before transaction","prompt":"Before I trigger this payment, check whether wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 has at least 50 USDC on Base — the USDC contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913."},{"title":"Monitor whale wallet token holdings","prompt":"Check the current USDC balance for the address 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B on Ethereum using the USDC contract 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 — I want to see if it's above 1 million."},{"title":"DeFi portfolio snapshot for a user","prompt":"Pull the WETH token balance for my wallet 0x1234567890abcdef1234567890abcdef12345678 on Base using contract 0x4200000000000000000000000000000000000006 and tell me the human-readable amount."}],"resultDescription":"Returns a JSON object with four fields: 'balance' (human-readable decimal string, e.g. '12.5'), 'raw' (integer string before decimal adjustment, e.g. '12500000'), 'symbol' (token ticker, e.g. 'USDC'), and 'decimals' (integer precision, e.g. 6).","failureModes":["Invalid or malformed wallet address returns an error response","Unsupported chain identifier (not 'base' or 'ethereum') causes a validation failure","Invalid or non-ERC-20 contract address may return zero balance or an error","Payment via x402/USDC on Base not settled causes 402 rejection before query executes","Network or node connectivity issues from the Europe hub may cause timeouts"],"whenToPreferThis":"Choose this endpoint when you need a pay-per-call, no-account ERC-20 token balance check on Base or Ethereum and want to avoid API key management. Ideal for agents making occasional on-demand balance lookups without committing to a subscription. Not suited for high-frequency polling or multi-chain batch queries.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-22T18:30:57.443Z","isFirstParty":false,"canonicalSlug":"erc-20-token-balance-lookup-base-ethereum-e15a4d6e"}