{"uid":"cap_RtHVQHfxvb5QnMaCvShof","slug":"bot-bazaar-usdc-eth-balance-lookup-b80c17aa","name":"Bot Bazaar USDC & ETH Balance Lookup","description":"Look up a Base wallet's native USDC and ETH balances at the latest block, plus account nonce (outgoing tx count) and contract/EOA status. Balances for the board operator's own (house) wallets are withheld.","url":"https://bot-bazaar.fly.dev/v1/x402/usdc-balance?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"EVM address on Base (0x + 40 hex)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_zhoGHL-FBcyWHznKzyo8Z","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches native ETH and USDC balances, account nonce, and contract/EOA status for a given Base network wallet address at the latest block.","exampleAgentPrompt":"What are the current USDC and ETH balances for the Base wallet 0x4e3a1F8C2d7B09aE543D1234567890abcdef1234, and is it a contract or a regular wallet?","exampleUseCases":[{"title":"Verify funding before agent transaction","prompt":"Before submitting that on-chain transaction, can you check how much USDC and ETH the Base wallet 0xAbC1234567890defABCDEF1234567890abcdef12 currently holds and confirm it's a regular user wallet, not a contract?"},{"title":"Monitor whale wallet activity","prompt":"I want to know the current ETH and USDC balances plus total outgoing transaction count for Base address 0x9F8e7D6c5B4A3210fEdCbA9876543210fEdCbA98 — I'm tracking whether this whale has been active recently."},{"title":"Audit counterparty wallet before payment","prompt":"Before I send funds to 0x1111222233334444555566667777888899990000 on Base, can you look up their current USDC and ETH balances and tell me if it's a smart contract address or a regular wallet?"}],"resultDescription":"Returns the wallet's native ETH balance, USDC balance, account nonce (number of outgoing transactions), and a flag indicating whether the address is a smart contract or an externally owned account (EOA) — all as of the latest block on Base. Balances for the operator's own house wallets are withheld.","failureModes":["Invalid address format (not 0x + 40 hex) returns a validation error","Address belongs to house/operator wallet — balances are withheld","Base RPC node unavailability may cause timeout or 503","Address is valid but has zero activity — returns zero balances and nonce 0","Payment not included or insufficient — x402 payment required error"],"whenToPreferThis":"Choose this endpoint when you need a quick, paid-per-call lookup of both USDC and ETH balances alongside nonce and contract status for a Base network address, without setting up your own RPC infrastructure. Ideal for agents performing pre-transaction checks, counterparty due diligence, or wallet auditing on the Base L2.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-30T19:06:23.252Z","isFirstParty":false,"canonicalSlug":"bot-bazaar-usdc-eth-balance-lookup-b80c17aa"}