{"uid":"cap_JA1fq7hZGhb3geOOh7yXf","slug":"apiacre-com-base-account-status-cec22e59","name":"apiacre.com Base Account Status","description":"Check one Base mainnet wallet or contract for ETH and official USDC balances, transaction nonce, and contract-bytecode evidence at a single resolved block.","url":"https://apiacre.com/v1/crypto/base-account-status","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"address":{"type":"string"},"block_tag":{"enum":["latest","safe","finalized"],"type":"string"}}},"responseSchema":{"type":"json","example":{"data":{"code":{"sha256":"98d785fcb1bf847f287adc2310759fd94cc13e754b974bc72131382e8266f607","status":"present","sizeBytes":1852},"block":{"hash":"0xbf20a3349486d50cba755d4a64cc4cbc64565c6133b7d25befe760b4331c2a4a","number":49895352,"timestamp":"2026-08-13T00:14:11+00:00","requestedTag":"safe"},"nonce":1,"source":"https://docs.base.org/base-chain/quickstart/connecting-to-base","address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","network":"eip155:8453","readOnly":true,"warnings":[],"disclaimer":"Point-in-time public Base state only. Empty code does not prove that an addre...","ethBalance":{"wei":"9800646158085843","formatted":"0.009800646158085843"},"usdcSource":"https://developers.circle.com/stablecoins/usdc-contract-addresses","explorerUrl":"https://basescan.org/address/0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","usdcBalance":{"atomic":"0","contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","decimals":6,"formatted":"0"},"networkRequestsMade":2,"transactionBroadcast":false},"meta":{"cached":false,"sources":[],"warnings":[],"duration_ms":42,"next_actions":[{"path":"/v1/crypto/base-account-snapshot","title":"Base account snapshot","method":"POST","reason":"Expand the account status into one-block ETH, native USDC, and optional calle...","service":"crypto.base-account-snapshot"}]},"service":"crypto.base-account-status","version":"1","request_id":"018f1f54-7f38-7ba2-8dc3-5f90272d9f1a"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_tnyPvMDr_mY7ThAZ_jC5K","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Reads ETH balance, transaction nonce, and contract-code presence for a single Ethereum address on Base mainnet at a specific resolved block.","exampleAgentPrompt":"What's the ETH balance, current nonce, and whether it's a contract for address 0xAbC123...def on Base mainnet — use the latest block.","exampleUseCases":[{"title":"Pre-flight wallet check before transfer","prompt":"Before I send ETH on Base, check address 0x4Fd8...3aB2's current ETH balance and nonce at the latest block so I can confirm it's active and has funds."},{"title":"Contract vs EOA detection","prompt":"Is 0x7E9A...1cD4 a smart contract or a regular wallet on Base mainnet? Check it at the current block and tell me if there's any deployed bytecode."},{"title":"Historical account snapshot for audit","prompt":"I need the ETH balance and nonce for address 0x23Ff...88EA on Base mainnet as it stood at block 12500000 for our audit trail."}],"resultDescription":"Returns the ETH balance (in wei or formatted units), transaction nonce, and a boolean or bytecode indicator showing whether the address has contract code deployed — all resolved at a single specified Base mainnet block height.","failureModes":["Invalid Ethereum address format returns a 400-level error","Requested block number not yet mined or too far in the past may return an error or empty result","Network timeout or RPC unavailability from Base mainnet node","Malformed request body missing required address or block fields","Rate limiting or payment failure (x402) if USDC balance is insufficient"],"whenToPreferThis":"Use this endpoint when you need a lightweight, single-address account snapshot on Base mainnet — specifically ETH balance, nonce, and contract presence — without needing token balances or full call execution. It is ideal for pre-transaction checks, EOA vs contract detection, and point-in-time audits. Choose the multi-balance sibling endpoint if you also need ERC-20 token balances.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:50:00.355Z","isFirstParty":false}