What Is ERC-6551? Token-Bound Accounts, the Standard That Gives NFTs a Wallet

ERC-6551 is an Ethereum standard that gives any NFT its own smart contract wallet. That wallet is called a token-bound account, or TBA. It can hold tokens, hold other NFTs and sign transactions, and whoever owns the NFT controls it. Sell the NFT, and everything inside the account goes with it. Three of the most talked-about NFT launches of 2026 run on this idea, and I keep explaining it inside those posts. StonkBrokers are NFTs that own tokenized stocks. Mudwater packs sit in accounts tied to Bored Apes.