Coinbase CEO Brian Armstrong expects AI agents to become a major user base for stablecoins as software increasingly handles payments without human intervention. Speaking about the emerging machine economy, Armstrong said crypto and stablecoins will be the go-to payment rail for AI agents and confirmed that Coinbase has started building payment infrastructure specifically for these autonomous users.
The exchange’s x402 protocol allows AI agents to pay directly for APIs, data, software, and other digital services, while Coinbase for Agents enables automated trading and financial tasks within user-defined spending limits. The goal is to support machine-to-machine commerce and high-frequency micropayments.
On-chain activity from XRPL AI Hub suggests that AI agents using the XRP Ledger are already favoring regulated stablecoins over native crypto assets. Over a 30-day trend in direct clearing settlements, Ripple USD has dominated, while XRP transaction volumes have stagnated over the past week.
BlackRock’s research note, The Machine-Native Economy, adds context. The asset manager argues that traditional banking cannot handle the millisecond micropayments made by autonomous software. BlackRock said the global stablecoin market has surpassed $300 billion, with annual transaction volume of $11.6 trillion, making stablecoins a basic unit of account for AI.
Because AI agents require predictable costs, volatile assets such as XRP are less suitable for automated budgeting. A price move of even a few percent within an hour could undermine an autonomous task’s financial model. Ripple USD, pegged one-to-one to the U.S. dollar, lets algorithms forecast costs precisely. While XRP retains a role in interbank clearing, Ripple’s digital dollar is taking the lead in the internal economy of robots on the XRP Ledger.
