$0.03
per call · USD Coin on Base
🆕 Every B20 has ERC-2612 permit built in — approve a spender by signature instead of a transaction. Reads exactly what an agent needs to build a valid permit: the token's DOMAIN_SEPARATOR, the owner's current nonce (so the signed payload can't be rejected/replayed), and the EIP-712 domain/type struct. Read-only — signs nothing.
Endpoint
GET https://402.com.tr/api/x402/b20-permit4
Calls / 30d
1
Unique payers / 30d
Sep 10
Last called
exact
Payment scheme
Call this service
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://402.com.tr/api/x402/b20-permit", {
method: "GET",
});
const data = await res.json();curl -X GET \
"https://402.com.tr/api/x402/b20-permit?address=0xb20000000000000000000186a08e781c38059eec&owner=0x973a31858f4d2125f48c880542da11a2796f12d6" \
-H "X-PAYMENT: <signed x402 payment>"Example response
{
"address": "0xb20000000000000000000186a08e781c38059eec",
"domainSeparator": "0xd4f8bd427e9fce6ac90676c1dbd0a5db5284c1397afa4e5e4a76925c5baac692",
"isB20": true,
"nonce": "0",
"owner": "0x973A31858f4D2125f48C880542DA11a2796f12D6",
"supportsPermit": true
}Payment details
0x973a31858f4d2125f48c880542da11a2796f12d6USD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913Is this your API?
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