{"uid":"cap_f_198UUZkqLs4ydu7l-IC","slug":"evm-native-balance-lookup-3274b3c4","name":"EVM Native Balance Lookup","description":"Global current weather, hourly forecasts, foreign-exchange rates, EVM reads, and deterministic utilities for AI agents. Pay per call with MPP or x402; no API key.","url":"https://agent-chain-kit-solana.vercel.app/v1/native-balance?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"address":{"type":"string","pattern":"^0x[a-fA-F0-9]{40}$"},"network":{"enum":["ethereum","base","arbitrum","polygon"],"type":"string"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"address":"0x0000000000000000000000000000000000000000","network":"base","balance_wei":"0","balance_native":"0"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_oHbF6hWj8jyANJh3FfNJe","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","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 (in wei and human-readable units) for a given EVM wallet address on Ethereum, Base, Arbitrum, or Polygon.","exampleAgentPrompt":"What's the current native ETH balance for wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on the Base network?","exampleUseCases":[{"title":"DeFi portfolio balance checker","prompt":"Can you check the native ETH balance for wallet 0xAbCd1234abcd1234abcd1234abcd1234abcd1234 on Ethereum mainnet?"},{"title":"Airdrop eligibility pre-check","prompt":"Before we process this airdrop, can you verify whether 0x1111111111111111111111111111111111111111 has any native balance on Polygon — even a small amount?"},{"title":"Agent wallet funding monitor","prompt":"Check if our agent wallet 0xDeAdBeEf00000000000000000000000000000000 still has native token funds on Arbitrum so I know if it needs topping up."}],"resultDescription":"Returns a JSON object containing the queried wallet address, the network it was queried on, the balance in wei (as a string), and the human-readable native token balance (e.g. ETH, MATIC). Returns zero balances for unfunded or non-existent addresses.","failureModes":["Invalid address format (not a 0x-prefixed 40-hex-char address) — schema validation error","Unsupported network name — enum constraint rejection","Network RPC unavailability — upstream read failure with error response","Payment not provided or insufficient — 402 payment required response","Zero balance returned for valid but unfunded address — not an error, just a zero result"],"whenToPreferThis":"Choose this endpoint when you need a fast, keyless, pay-per-call read of a native token balance on Ethereum, Base, Arbitrum, or Polygon. It is ideal for AI agents that need on-chain balance data without managing API keys or subscriptions, and supports micropayment via x402/MPP. Prefer alternatives if you need ERC-20 token balances, historical balance data, or support for non-EVM chains like Solana.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-10T00:48:12.710Z","isFirstParty":false,"canonicalSlug":"evm-native-balance-lookup-3274b3c4"}