HTTP 402, a payment protocol code introduced in 1996, is experiencing a resurgence in the AI era, according to MetaEra. Originally intended for micro-payments, the protocol struggled in the 1990s due to high transaction costs and inadequate infrastructure. However, the growing need for low-cost, high-frequency payments in AI-driven activities, such as API calls and machine-to-machine transactions, is reviving interest in HTTP 402. Projects like AIsa are developing the necessary infrastructure to support HTTP 402, including wallet systems and high-speed settlement networks. This development could transform value exchange in the AI economy, enabling seamless, automated transactions.