{"uid":"cap_HERSEFjXAgL0TkLF2xbDU","slug":"erc-20-token-balance-lookup-base-ethereum-via-x402-69b81388","name":"ERC-20 Token Balance Lookup (Base/Ethereum) via x402","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://crystalbell.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_UIlSMAJTbVK8oq4AZtqDx","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 of a given wallet address on Base or Ethereum, paid per-call with USDC via x402.","exampleAgentPrompt":"What's the USDC balance of wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base? The USDC contract address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","exampleUseCases":[{"title":"Verify wallet holds enough USDC","prompt":"Before I send a payment, check whether wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 has at least 100 USDC on Base — the USDC contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913."},{"title":"Monitor DeFi treasury token balance","prompt":"What's the current DAI balance of our treasury wallet 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B on Ethereum? The DAI contract address is 0x6B175474E89094C44Da98b954EedeAC495271d0F."},{"title":"Audit airdrop recipient token holdings","prompt":"Check how many tokens from contract 0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984 the address 0x3f5CE5FBFe3E9af3971dD833D26bA9b5C936f0bE holds on Ethereum."}],"resultDescription":"A JSON object containing the 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 token contract.","failureModes":["Invalid or non-checksummed EVM address returns an error","Unsupported chain value (only 'base' and 'ethereum' are valid) returns a bad request error","Non-ERC-20 contract address returns zero balance or an error","Network timeout or RPC node unavailability from the Germany hub returns a connectivity error","Missing required query parameters (chain, token, address) returns a validation error"],"whenToPreferThis":"Use this endpoint when you need a quick, no-account, pay-per-use ERC-20 token balance lookup on Base or Ethereum without setting up an API key or RPC node. It is ideal for lightweight on-chain data checks in agent workflows where deterministic, real-time balance data is needed for a specific wallet and token contract. Prefer this over full blockchain node queries or heavier indexing services when you only need a single address balance with minimal setup.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-27T06:37:49.524Z","isFirstParty":false,"canonicalSlug":"erc-20-token-balance-lookup-base-ethereum-via-x402-69b81388"}