{"uid":"cap_mfj8cxqtXbSrnYrA_VBoW","slug":"evm-wallet-balance-lookup-0ec7759b","name":"EVM Wallet Balance Lookup","description":"Stable edge-hosted x402 utilities for autonomous agents.","url":"https://free-asset-radar-x402.besenok2018.workers.dev/api/x402/evm-wallet-balance?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"required":{"type":"string"},"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"nonce":7,"address":"0x...","network":"arbitrum","isContract":false,"nativeBalance":"0.01"}},"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_SfG4hoH4w1ZfWtTO6otod","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":"Returns the native token balance, nonce, contract status, and network info for a given EVM wallet address","exampleAgentPrompt":"What's the current native token balance and nonce for wallet 0xAbC123...456 on Arbitrum — and is it a contract or EOA?","exampleUseCases":[{"title":"Pre-flight balance check before transaction","prompt":"Before I send a transaction, check if wallet 0xDeF456...789 on Arbitrum has enough native ETH to cover gas — what's its current balance?"},{"title":"Agent treasury monitoring","prompt":"Look up the on-chain native balance and nonce for my agent's wallet 0xAaA111...222 on Arbitrum so I know if it needs to be topped up."},{"title":"Contract vs EOA verification","prompt":"Is 0xBbB333...444 on Arbitrum a smart contract or a regular wallet, and what's its current native balance?"}],"resultDescription":"Returns a JSON object containing the wallet address, the blockchain network (e.g. 'arbitrum'), the native token balance as a decimal string, the current nonce (transaction count), and a boolean indicating whether the address is a smart contract.","failureModes":["Invalid or malformed EVM address returns an error response","Unsupported or unrecognized network name may return an error or empty result","Rate limiting or Cloudflare Worker quota exceeded may return 429 or 503","Payment failure via x402 protocol results in 402 Payment Required before any data is returned","Address with no on-chain activity may return nonce 0 and balance 0.0"],"whenToPreferThis":"Choose this endpoint when you need a lightweight, pay-per-call, edge-hosted lookup of native token balance and account state (nonce, contract status) for an EVM address — especially useful for autonomous agents that need to verify wallet funding or account status before executing on-chain actions, without running a full node or paying for a subscription RPC service.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T04:44:14.265Z","isFirstParty":false,"canonicalSlug":"evm-wallet-balance-lookup-0ec7759b"}