Erc721 Owner

Last 30 days

Uptime

100%

Response time

189 ms typical, 189 ms slowest 5%

Last check

2 h ago

Next check

any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X GET "https://agent402.tools/api/erc721-owner?contract=0x57f1887a8BF19b14fC0dF6Fd9B2acc9Af147eA85&network=ethereum&tokenId=0xaf2caa1c2ca1d027f1ac823b529d0a67cd144264b2789fa2ea4d63a67c7103cc"

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

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagent402.tools%2Fapi%2Ferc721-owner
const res = await pay("https://agent402.tools/api/erc721-owner?contract=0x57f1887a8BF19b14fC0dF6Fd9B2acc9Af147eA85&network=ethereum&tokenId=0xaf2caa1c2ca1d027f1ac823b529d0a67cd144264b2789fa2ea4d63a67c7103cc");
console.log(await res.json());

Example input

{
  "contract": "0x57f1887a8BF19b14fC0dF6Fd9B2acc9Af147eA85",
  "network": "ethereum",
  "tokenId": "0xaf2caa1c2ca1d027f1ac823b529d0a67cd144264b2789fa2ea4d63a67c7103cc"
}

Example output

{
  "contract": "0x57f1…",
  "network": "ethereum",
  "owner": "0x…",
  "tokenId": "0xaf2c…"
}

Security scan

• No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

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