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EVM Multi-Chain Wallet & Contract State
x402
EVM Multi-Chain Wallet & Contract State is a paid API for AI agents from agent.connskill.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-13).
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
Price / call$0.05
Success—
StatusUnknown
How this service works
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
Output
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.
Example use cases
DeFi portfolio balance check
“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.”
Smart contract identity verification
“Is the address 0xContractAddr...ABCD on Ethereum an EOA or a smart contract? Also grab its current nonce and native balance.”
Pre-transaction wallet state audit
“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.”
Technical details
Endpoint
POSThttps://agent.connskill.com/chain/v1/chain-stateWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chainrequired | string | One of: base, ethereum, arbitrum, optimism, polygon |
| tokens | array | ERC-20 contracts to read balances for, max 10 |
| addressrequired | string | Wallet or contract address (0x…, 40 hex) |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| native | object | |
| status | string | |
| tokens | array |
Tags
x402
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