Q
$0.001
per call · USD Coin on Base
Check ETH and USDC (or any ERC-20) balance of an address on Base — pre-flight funding checks for payments and settlement.
Endpoint
GET https://quartermaster.surewhynot.app/v1/balance3
Calls / 30d
3
Unique payers / 30d
Sep 9
Last called
exact
Payment scheme
Call this service
TypeScript · @x402/fetch
import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";
const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);
const res = await fetchWithPay("https://quartermaster.surewhynot.app/v1/balance", {
method: "GET",
});
const data = await res.json();cURL
curl -X GET \
"https://quartermaster.surewhynot.app/v1/balance?address=0xc2a36e22ecbf353086cf83e7beea78bc28a64083&token=usdc" \
-H "X-PAYMENT: <signed x402 payment>"Example response
{
"address": "0xc2a3...4083",
"eth": "0.0031",
"network": "base",
"token": {
"address": "0x8335...2913",
"balance": "12.5",
"decimals": 6,
"symbol": "USDC"
}
}Payment details
Pay to
0x5253666c40432f009ebd99908b9cd2a7fd1019cbAsset
USD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913NetworksBase, Solana
Schemesexact
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