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EVM Chain Balance Lookup (Europe Hub)
x402
EVM Chain Balance Lookup (Europe Hub) is a paid API for AI agents from kollmz.site:8443, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-27).
Returns the current ETH balance, nonce, and block number for an EVM address on Base or Ethereum, queried from a European node, paid per-call via x402/USDC.
Price / call$0.002
Success—
StatusUnknown
How this service works
Pay-per-call website uptime/latency/TLS checks and fetch-to-Markdown, measured from Hub Europe (Germany). USDC on Base via x402. No account or API key.
Output
A JSON object containing the wallet address, chain name, current ETH balance in both ETH and wei units, the account nonce, and the most recent block number at time of query.
Example use cases
DeFi bot pre-flight balance check
“Before executing the swap, check the ETH balance of 0xAbc123...def456 on Base so I know if it has enough gas.”
Wallet monitoring for accounting
“Pull the current ETH balance and block number for address 0x742d35Cc6634C0532925a3b844Bc454e4438f44e on Ethereum — I need it for our end-of-day records.”
Nonce lookup before transaction broadcast
“What's the current nonce for wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base? I need to build the next transaction correctly.”
Technical details
Endpoint
GEThttps://kollmz.site:8443/v1/chain/balance?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, no-account, pay-per-call EVM balance check on Base or Ethereum without setting up an Alchemy/Infura API key. Especially useful for agents making occasional on-demand balance queries billed per-use in USDC, or when European node proximity is desirable for latency or compliance reasons.
Side effects
- Invalid or malformed 0x address returns an error response
- Unsupported chain value (only 'base' and 'ethereum' accepted) causes a validation error
- Node connectivity issues from the European hub may cause timeouts
- Payment failure via x402/USDC results in HTTP 402 and no data returned
- Missing required query parameters (chain or address) returns a schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"block": 36000000,
"chain": "base",
"nonce": 5,
"address": "0x...",
"balance_eth": "0.0123",
"balance_wei": "12300000000000000"
}
}Tags
x402
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