ERC-721

ERC-721 is the non-fungible token standard on EVM chains where every token has a unique ID and distinct, individually tracked ownership.

ERC-721 defines an interface for non-fungible tokens, where each token has a unique identifier and a single owner at a time. It provides ownerOf, transferFrom, and approval functions, plus a Transfer event that logs each change of ownership. Unlike fungible ERC-20 tokens, no two ERC-721 tokens are interchangeable, which suits collectibles, deeds, and identity. Ownership and metadata references live in contract storage. Our decoded data resolves ERC-721 Transfer events into token ID, from, and to fields, so you reconstruct full ownership history from archive logs.