U.S.-listed cryptocurrency exchange Coinbase has launched an updated version of its stablecoin-based payments protocol, aimed at enhancing the functionality for AI agents. The newly released x402 V2 aims to streamline the integration process, allowing developers to combine payments, enable secure wallet access, and introduce additional features with a modular design.
In an email statement, a Coinbase representative noted that the upgrade shifts the focus from merely explaining what the protocol does to identifying which existing services can be integrated with it next. The update builds on the foundation laid by the original x402 protocol, which was made open source earlier this year, and introduces a discovery layer for AI agents. This layer, referred to as x402 Bazaar, acts as a resource akin to “Google for agents,” simplifying the discovery and implementation process of payment systems.
According to Coinbase, x402 V2 enhances the original protocol by moving beyond basic payment functions. The update includes several new features, such as wallet-based identity, which reduces the need for repetitive repayment calls. It also supports automatic API discovery, dynamic payment recipients, and compatibility with multiple blockchain chains and fiat currencies through Chain Agnostic Improvement Proposals (CAIP) standards. Furthermore, x402 V2 offers a fully modular software development kit (SDK) that caters to custom networks and schemes.
The overarching goal of these enhancements is to make the x402 protocol cleaner, more extensible, and future-proof. Coinbase emphasizes that it enables unified payment models, facilitating wallet-based access for both AI agents and human users, thereby paving the way for a more flexible and integrated payments landscape in the cryptocurrency sector.
