{"uid":"cap_e9gQhp2D_W3lHJxzLjgGH","slug":"evm-multi-chain-wallet-contract-state-1ddbf816","name":"EVM Multi-Chain Wallet & Contract State","description":"Wallet/contract state on 5 EVM chains in one call: native balance, nonce, EOA-or-contract (EIP-7702-aware), ERC-20 balances with symbol and decimals","url":"https://agent.connskill.com/chain/v1/chain-state","method":"POST","headers":{},"bodySchema":{"type":"object","required":["address","chain"],"properties":{"chain":{"type":"string","description":"One of: base, ethereum, arbitrum, optimism, polygon"},"tokens":{"type":"array","description":"ERC-20 contracts to read balances for, max 10"},"address":{"type":"string","description":"Wallet or contract address (0x…, 40 hex)"}}},"responseSchema":{"type":"object","properties":{"native":{"type":"object"},"status":{"type":"string"},"tokens":{"type":"array"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_p4yIxk97Dl_9xJf01adIw","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns native balance, nonce, EOA/contract status (EIP-7702-aware), and ERC-20 token balances for any address on one of five EVM chains in a single call","exampleAgentPrompt":"What's the ETH balance, nonce, and USDC balance for wallet 0xAbC1234...5678 on Base? Also tell me whether it's an EOA or a contract.","exampleUseCases":[{"title":"DeFi portfolio balance check","prompt":"Can you pull the native ETH balance plus USDC and WETH token balances for 0xDeFi...1234 on Arbitrum? I want to see everything in one shot."},{"title":"Smart contract identity verification","prompt":"Is the address 0xContractAddr...ABCD on Ethereum an EOA or a smart contract? Also grab its current nonce and native balance."},{"title":"Pre-transaction wallet state audit","prompt":"Before I send a transaction, check the current nonce and MATIC balance for 0xMyWallet...5678 on Polygon, and also fetch the USDT balance so I know if there are enough funds."}],"resultDescription":"A JSON object with a 'native' sub-object (native token balance and nonce), an account 'status' string indicating EOA, contract, or EIP-7702-upgraded account, and a 'tokens' array with each requested ERC-20 contract's balance, symbol, and decimals.","failureModes":["Invalid or malformed address (not a 40-hex 0x string) returns an error","Unsupported chain name (not one of base, ethereum, arbitrum, optimism, polygon) returns a validation error","More than 10 token addresses in the tokens array rejected","RPC timeout or chain node unavailability causes a 5xx error","Payment not provided or insufficient USDC causes a 402 response"],"whenToPreferThis":"Choose this endpoint when you need to aggregate native balance, nonce, account type, and multiple ERC-20 balances for a single address in one round-trip across any of the five major EVM chains (Base, Ethereum, Arbitrum, Optimism, Polygon). It is EIP-7702-aware, making it superior to basic eth_getBalance calls when you need to distinguish delegated EOAs from standard EOAs or contracts. Prefer it over separate RPC calls when you want a consolidated snapshot of on-chain wallet state without managing multiple provider connections.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-16T00:51:09.755Z","isFirstParty":false}