$0.04
per call · USD Coin on Base
🆕 A B20 with a METADATA_ROLE holder can call updateName/updateSymbol — change its own identity after launch (an impersonation / bait-and-switch vector ERC-20 has no protocol equivalent for). Reads whether the metadata is mutable (role holder exists) AND whether it has ALREADY been renamed on-chain (NameUpdated/SymbolUpdated history). Trust the address, not the label.
Endpoint
GET https://402.com.tr/api/x402/b20-metadata4
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-metadata", {
method: "GET",
});
const data = await res.json();curl -X GET \
"https://402.com.tr/api/x402/b20-metadata?address=0xb20000000000000000000186a08e781c38059eec" \
-H "X-PAYMENT: <signed x402 payment>"Example response
{
"address": "0xb20000000000000000000186a08e781c38059eec",
"checkedAt": "2026-09-10T03:01:05.728Z",
"currentSymbol": "NADT",
"isB20": true,
"metadataControllersCount": 0,
"metadataMutable": false,
"renameCount": 0,
"verdict": "immutable"
}Payment details
0x973a31858f4d2125f48c880542da11a2796f12d6USD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913Is this your API?
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