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Chain Nft Owner

by api.onesource.io in Onchain & crypto

x402 APIPassing, checked 3 h ago

Look up the current owner of an ERC721 NFT by token_id via ownerOf (eth_call)

GET https://api.onesource.io/api/chain/nft-owner

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
130 ms typical, 130 ms slowest 5%
Last check
3 h ago
Next check
any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X GET "https://api.onesource.io/api/chain/nft-owner?contract=0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d&network=ethereum&token_id=1"
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 $0.03:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.onesource.io%2Fapi%2Fchain%2Fnft-owner
const res = await pay("https://api.onesource.io/api/chain/nft-owner?contract=0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d&network=ethereum&token_id=1");
console.log(await res.json());

Example input

{
  "contract": "0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d",
  "network": "ethereum",
  "token_id": "1"
}

Example output

{
  "data": {
    "contract_address": "0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d",
    "owner": "0x46efbaedc92067e6d60e84ed6395099723253d67",
    "token_id": "1"
  },
  "meta": {
    "cost_usdc": "0.001",
    "endpoint": "/api/chain/nft-owner",
    "payment_chain": "base",
    "payment_token": "USDC",
    "request_id": "00000000abcdef01"
  }
}

Security scan

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

Recent checks

WhenResultHTTPTimePrice
3 h agoPassed402130 ms$0.003