{"resource":"https://agent402.tools/api/erc721-owner","service":"NFT owner lookup (ERC-721","areas":["other"],"answering":true,"http_status":402,"latency_ms":196,"price_usdc":0.002,"buyers_30d":3,"calls_30d":3,"description":"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.","id":"41ee52c77f45","category":"Blockchain reads","accuracy":null,"tool_calls":null,"checked_day":"2026-10-11","page":"https://velliumandco.com/sellers/41ee52c77f45"}