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FiatDock USDC Balance on Base
x402
FiatDock USDC 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 USDC balance of any Base network address in both human-readable USDC units and atomic (raw) form.
Price / call$0.001
Success—
StatusUnknown
How this service works
USDC balance of any address on Base — the x402 settlement asset (atomic + USDC). Pay-per-call via x402.
Output
Returns a JSON object containing: the USDC balance as a decimal string (e.g. '1'), the raw atomic balance as an integer string (e.g. '1000000' for 6 decimals), the asset symbol ('USDC'), the network identifier ('base'), the queried address, the USDC contract address on Base, and an ISO 8601 timestamp (asOf) indicating when the balance was fetched.
Example use cases
Pre-payment balance check for DeFi agent
“Before my agent sends a USDC payment on Base, check whether wallet 0xAbc123...def456 has at least 50 USDC available right now.”
Portfolio dashboard USDC snapshot
“Pull the current USDC balance for each of these three Base addresses — 0xAAA..., 0xBBB..., 0xCCC... — and tell me the amounts in both USDC and atomic units.”
Automated settlement verification
“After the x402 payment settled, confirm how much USDC is now sitting in the settlement wallet 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.”
Technical details
Endpoint
POSThttps://fiatdock.com/v1/chain/usdc-balanceWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call USDC balance check specifically on the Base network without setting up a full RPC node or indexer. It is ideal for AI agents and automation workflows that need atomic-precision USDC amounts for settlement verification, pre-payment checks, or portfolio monitoring on Base, and where the x402 micropayment model fits the cost structure.
Side effects
- Invalid or malformed Base address returns an error response
- Address not found or zero balance returns atomic: '0' and usdc: '0'
- Network congestion may cause slightly stale balance data
- Pay-per-call x402 payment failure blocks the request
- Rate limiting if called too rapidly without valid micropayments
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| address | string | A 40-hex EVM address (0x…) |
Output
Schema · Response
{
"type": "json",
"example": {
"asOf": "2026-07-30T00:00:00.000Z",
"usdc": "1",
"asset": "USDC",
"atomic": "1000000",
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"network": "base",
"contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
}
}Tags
x402
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