US-listed cryptocurrency exchange Coinbase (COIN) has launched the latest version of its stablecoin-based payment protocol for AI agents, making it easier to expand and branch the autonomous payment system, the exchange announced in a blog post on Thursday.
The fast track x402 V2 takes the AI agentic payments tool from “So what does it actually do” to “What existing services can we plug it into next,” a Coinbase representative said in an email. Specifically, x402 V2 allows developers to combine payments, enable secure wallet access, and add new features through a clean, modular design, Coinbase said.
Earlier this year, Coinbase engineers released the open-source standalone payments protocol x402 and recently added a discovery layer for AI agents, something like a “Google for agents,” dubbed x402 Bazaar.
In a blog post, Coinbase said x402 V2 extends the protocol beyond single call exact payments. “It adds wallet-based identity (skip refund on every call), auto discovery of APIs, dynamic payment recipients, support for more chains and fiat via CAIP. [Chain Agnostic Improvement Proposals for blockchain interoperability] standards and a fully modular SDK for custom networks and schematics,” Coinbase said.
All of this aims to make x402 “cleaner, more extensible and scalable, enabling unified payment models and wallet-based access for agents and humans,” the exchange said.
