ERC-20 token metadata

Resolve an ERC-20 contract address to its on-chain metadata: symbol, decimals, name, and logo URL where available. Use this to humanize a raw contract address before showing it to a user or before computing fiat values.

Input

Field	Type	Description
contract *	string	0x-prefixed 40-char ERC-20 contract address.
network	string	ethereum / base / polygon / arbitrum / optimism (default base).

Example output

{
  "contract": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
  "network": "base",
  "symbol": "USDC",
  "name": "USD Coin",
  "decimals": 6,
  "logo": "https://example.com/usdc.png"
}

Try it — see the 402 challenge (free)

curl -i -X POST https://agent402.tools/api/token-metadata \
  -H "Content-Type: application/json" \
  -d '{"contract":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","network":"base"}'

The response is HTTP 402 Payment Required with exact payment requirements. Any x402 v2 client pays automatically and retries:

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/token-metadata", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "contract": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
    "network": "base"
  }),
});

Wallet-only. This tool reaches the network/browser/storage, so it is paid in USDC via x402 (no proof-of-work tier).

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