Coinbase Expands x402 With AI Agent App Store, Pushing Crypto Payments Into AI Infrastructure

Coinbase has launched Agent.market, an AI agent app store built on its x402 payment protocol, embedding permissionless stablecoin rails directly into AI infrastructure across seven service categories. As of April 21, 2026, approximately 69,000 active AI agents on x402 have already processed over 165 million transactions totaling $50 million in volume, figures that frame this as an infrastructure play, not a speculati…