$0.02
per call · USD Coin on Base
🆕 Run FIRST on any 'B20'. A scammer can deploy a normal contract at a vanity 0xB200… address and fake the whole B20 read surface — the B20Factory precompile is the one authority that can't be spoofed. Verifies factory registration + bytecode absence (real B20s are chain-native precompiles with no code). verdict: genuine / fake_lookalike / not_b20. The 2-cent check that keeps every other B20 answer honest.
Endpoint
GET https://402.com.tr/api/x402/b20-authenticity4
Calls / 30d
1
Unique payers / 30d
Sep 4
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-authenticity", {
method: "GET",
});
const data = await res.json();curl -X GET \
"https://402.com.tr/api/x402/b20-authenticity?address=0xb20000000000000000000186a08e781c38059eec" \
-H "X-PAYMENT: <signed x402 payment>"Example response
{
"address": "0xb20000000000000000000186a08e781c38059eeC",
"factoryConfirms": true,
"hasBytecode": true,
"initialized": true,
"prefixLooksB20": true,
"verdict": "genuine"
}Payment details
0x973a31858f4d2125f48c880542da11a2796f12d6USD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913Is this your API?
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