Quack AI has announced the launch of x402 BNB, a pioneering infrastructure designed to streamline transactions on the BNB Chain. This new system introduces a unified "signature-as-payment" layer, simplifying the transaction process by allowing authorization, transfers, and payments to be completed with a single signature. The x402 BNB leverages EIP-7702 and EIP-712 standards to eliminate manual gas processing and duplicate confirmations. The x402 BNB infrastructure includes a Gas-sponsored relay layer and a policy governance module, enhancing its utility for various applications such as multi-address payments, automatic renewals, and DAO fund allocation. This development aims to provide a more efficient and secure transaction experience for the on-chain agent economy.