agent402.tools api erc721-owner

https://agent402.tools/api/erc721-owner

answers 402

Who owns this NFT? Calls ownerOf(tokenId) on any ERC-721 contract on Ethereum, Base, Polygon, Arbitrum, or Optimism. Complements nft-holdings (which lists a WALLET's NFTs) - this answers by TOKEN. Keyless multi-endpoint failover. ?contract=0x…&tokenId=123&network=ethereum

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.

Price: $0.002
Network: base
Pay to: 0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0
Spec dialect: v2 (declares x402Version 2)
Transport: PAYMENT-REQUIRED header
HTTP method: GET
Response latency: 108 ms
Payment options: 13 usable of 13
Last checked: 2026-09-06T01:16:34.992Z (19d ago)
Category: finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fagent402.tools%2Fapi%2Ferc721-owner"