{"uid":"cap_MxClHXrWtSe9SIBcFSmcf","slug":"x402-toolbox-eth-balance-lookup-b050f751","name":"x402-toolbox ETH Balance Lookup","description":"309 deterministic pay-per-call tools for AI agents over x402 (USDC, Base). No signup, no API key: the payment is the identity.","url":"https://x402-toolbox.shablony-pro.workers.dev/chain/eth-balance?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"schema":{"type":"string"}}},"responseSchema":{"type":"json","example":{"ok":true,"paid":true}},"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_6mbjETgDfAhtEmnkWtnCC","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 ETH balance of an Ethereum address, paid per-call via USDC over x402 with no API key required.","exampleAgentPrompt":"What's the current ETH balance for the wallet address 0x742d35Cc6634C0532925a3b8D4C9C3Db9cB9A3e4?","exampleUseCases":[{"title":"DeFi portfolio ETH balance check","prompt":"Can you check how much ETH is sitting in my wallet 0x742d35Cc6634C0532925a3b8D4C9C3Db9cB9A3e4 right now?"},{"title":"Agent treasury monitoring","prompt":"Look up the ETH balance for our agent's treasury wallet at 0xdAC17F958D2ee523a2206206994597C13D831ec7 so I can see if we need to top it up."},{"title":"Smart contract ETH holdings audit","prompt":"What is the current ETH balance held by the contract at address 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D?"}],"resultDescription":"Returns a JSON object with an 'ok' boolean confirming the request succeeded and a 'paid' boolean confirming the x402 micropayment was accepted, along with the ETH balance for the queried address.","failureModes":["Invalid or malformed Ethereum address returns an error response","Network or RPC connectivity issues to the Ethereum node may cause lookup failure","x402 payment failure (insufficient USDC, wrong network, expired payment) results in 402 response and no data","Unpopulated or zero-balance address returns a valid response with 0 ETH"],"whenToPreferThis":"Choose this endpoint when you need a no-signup, no-API-key ETH balance lookup billed per-call via USDC micropayment over x402 on Base — ideal for AI agents that already have an x402-compatible wallet and need on-chain data without managing API credentials.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:49:10.647Z","isFirstParty":false,"canonicalSlug":"x402-toolbox-eth-balance-lookup-b050f751"}