US-listed cryptocurrency exchange Coinbase (COIN) has released the latest version of its stablecoin-based payment protocol for AI agents, making it easier to expand and connect the autonomous payment system, the exchange said in a blog post on Thursday.
The cleverly titled x402 V2 moves the AI agent payments tool from asking “So what does it actually do” to “What existing services can we plug 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 via a clean, modular design, Coinbase said.
Earlier this year, Coinbase engineers released the open source autonomous payments protocol x402 and recently added a discovery layer for AI agents, something like a “Google for agents,” called x402 Bazaar.
In a note attached to the blog post, Coinbase said x402 V2 extends the protocol beyond single-call, accurate payments. “It adds wallet-based identity (skip refund on every call), automatic API discovery, dynamic payees, multi-chain support and fiat via CAIP [Chain Agnostic Improvement Proposals for blockchain interoperability] standards and a fully modular SDK for custom networks and schemes,” Coinbase said.
It all aims to make x402 “cleaner, more extensible and future-proof, enabling unified payment models and wallet-based access for both agents and people,” the exchange said.
