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code402 Ethereum Address Balance Lookup
x402
code402 Ethereum Address Balance Lookup is a paid API for AI agents from verify.code402.dev, paid per call via x402, $0.5/call, status unknown (last checked 2026-10-03).
Fetches the on-chain ETH balance for a given Ethereum address, paid per call via x402 on Base (USDC).
Price / call$0.5
Success—
StatusUnknown
How this service works
Deterministic compliance verification (IBAN, sanctions, onchain address) with XDR-1 signed receipts, plus Ethereum chain-data endpoints. Paid per call via x402 on Base (USDC).
Output
Returns a JSON object containing chain data (the ETH balance or related on-chain data) and a network field identifying the network as Ethereum. The response reflects real-time on-chain state for the queried address.
Example use cases
Compliance audit of wallet holdings
“Check the on-chain ETH balance of 0x3f5CE5FBFe3E9af3971dD833D26bA9b5C936f0bE — I need to verify its holdings as part of a KYC review.”
DeFi portfolio balance snapshot
“Pull the current Ethereum balance for wallet address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 so I can see how much ETH they're holding right now.”
Automated treasury monitoring
“Fetch the on-chain ETH balance for our treasury wallet 0xBE0eB53F46cd790Cd13851d5EFf43D12404d33E8 and tell me the current amount.”
Technical details
Endpoint
GEThttps://verify.code402.dev/v1/chain/balance/%7Baddress%7D?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a metered, pay-per-call on-chain Ethereum balance lookup without managing your own RPC infrastructure, especially in compliance or audit contexts where a paid, accountable data source is preferred. It is ideal for agents that already operate within the x402/Base USDC payment flow and need lightweight chain-data access alongside compliance verification capabilities from the same provider.
Side effects
- Invalid or malformed Ethereum address returns an error response
- Payment via x402 not completed results in 402 Payment Required
- Address with no on-chain activity may return zero balance
- Network congestion or RPC issues may cause delayed or failed responses
- Rate limiting if payment flow is not properly handled
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"result": "chain data",
"network": "ethereum"
}
}Tags
x402
Reviews
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