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EVM Wallet Balance Lookup
x402
EVM Wallet Balance Lookup is a paid API for AI agents from free-asset-radar-x402.besenok2018.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-02).
Returns the native token balance, nonce, contract status, and network info for a given EVM wallet address
Price / call$0.003
Success—
StatusUnknown
How this service works
Stable edge-hosted x402 utilities for autonomous agents.
Output
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.
Example use cases
Pre-flight balance check before transaction
“Before I send a transaction, check if wallet 0xDeF456...789 on Arbitrum has enough native ETH to cover gas — what's its current balance?”
Agent treasury monitoring
“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.”
Contract vs EOA verification
“Is 0xBbB333...444 on Arbitrum a smart contract or a regular wallet, and what's its current native balance?”
Technical details
Endpoint
GEThttps://free-asset-radar-x402.besenok2018.workers.dev/api/x402/evm-wallet-balance?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| required | string | |
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"nonce": 7,
"address": "0x...",
"network": "arbitrum",
"isContract": false,
"nativeBalance": "0.01"
}
}Tags
x402
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