A familiar question in crypto during every bull run is “where to find the next billion users.” Now, an answer is beginning to take shape: it could be a billion AI agents.
Coinbase’s x402 payment protocol, specifically designed for machine-to-machine payments, has processed over 165 million transactions totaling $50 million, according to figures released by Coinbase. Nearly all of them, roughly 99%, were settled in USDC, averaging only about 30 cents per transaction. These are small, recurring payments—precisely the kind generated when an agent calls an online service or purchases data.
The momentum is coming from two fronts. On the infrastructure side, Cloudflare with its Wallets suite and cloudflare.pay, alongside MoonPay, Visa, and Mastercard, are all building platforms for agents to spend within predefined limits. The common concept is that an agent can autonomously pay for what it needs, but cannot exceed the budget authorized by its operator.
In terms of industry perspective, Coinbase’s head of AI product compares this phase to the Napster and LimeWire era of autonomous machine payments: the technology is working, everyone recognizes the potential, but the actual scale remains tiny compared to the global payments market.
The most notable takeaway lies in the shift in mindset. Instead of competing to bring crypto to human masses through a wave of consumer apps, the new bet is on letting machines transact with each other using stablecoins. There, USDC captures virtually the entire market share, as a USD-pegged, stable, and widely accepted currency is best suited for machine-to-machine settlements.
For market observers, this signal cuts both ways. It opens up a new use case for stablecoins beyond speculation, but at the same time indicates that real financial flows remain in an experimental phase, having yet to generate substantial volume.