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FiatDock ETH Balance on Base
x402
FiatDock ETH Balance on Base is a paid API for AI agents from fiatdock.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Returns the ETH balance (in both wei and ETH) of any address on the Base network, with a timestamp.
Price / call$0.001
Success—
StatusUnknown
How this service works
ETH balance of any address on Base (wei + ETH). Pay-per-call via x402.
Output
Returns a JSON object with the address's ETH balance as a decimal string (eth), the raw wei amount as a string (wei), the queried address (address), the network name (base), and an ISO 8601 timestamp (asOf) indicating when the balance was read.
Example use cases
Gas sufficiency check before transaction
“Before I send this transaction, check if 0xAbCd1234... has enough ETH on Base to cover gas fees — tell me the current ETH balance in both ETH and wei.”
Wallet funding verification for onboarding
“I need to confirm that the new user wallet 0x1234abcd... is funded on Base — what's its ETH balance right now?”
DeFi position monitoring for ETH collateral
“Keep an eye on 0xDEF456... — what's the current ETH balance on Base so I can see if the collateral level is still healthy?”
Technical details
Endpoint
POSThttps://fiatdock.com/v1/chain/eth-balanceWhen to prefer
Choose this endpoint when you need a fast, pay-per-call ETH balance lookup on Base without managing your own RPC infrastructure. It's ideal for agents that need native token balance as a lightweight chain primitive — especially when already operating within the x402 payment ecosystem on Base. Prefer it over full address intelligence endpoints when you only need ETH balance and not contract metadata or USDC balance.
Side effects
- Invalid or malformed Ethereum address returns an error response
- Address with zero balance returns eth: '0' and wei: '0' (not an error)
- Network connectivity issues to Base RPC may return a timeout or upstream error
- Payment failure via x402 (insufficient USDC) blocks the call before execution
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| address | string | A 40-hex EVM address (0x…) |
Output
Schema · Response
{
"type": "json",
"example": {
"eth": "1",
"wei": "1000000000000000000",
"asOf": "2026-07-30T00:00:00.000Z",
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"network": "base"
}
}Tags
x402
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