US-listed cryptocurrency exchange Coinbase (COIN) has launched the latest version of its stablecoin-based payments protocol for AI agents, making it easier to extend and connect the autonomous payments system, the exchange said in a blog post on Thursday.
The aptly titled x402 V2 takes the AI agent payments tool from asking “So what does it actually do?” to “What existing services can we connect it to 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 launched the open-source autonomous payments protocol x402, and more recently added a discovery layer for AI agents, something of a “Google for agents,” called x402 Bazaar.
In a note attached to the blog post, Coinbase said x402 V2 expands the protocol beyond single-call exact payments. “Adds wallet-based identity (skip payment on every call), automatic API discovery, 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 schemes,” Coinbase said.
It’s all aimed at making x402 “cleaner, more extensible and future-proof, enabling unified payment models and wallet-based access for agents and humans alike,” the exchange said.
