Circle Launches Agent Stack — USDC Nanopayments as Small as $0.000001 for Machine-to-Machine Commerce

Circle·medium signal

Circle shipped Agent Stack on May 11 with four components: Circle CLI (control plane for wallets and policies), Agent Wallets (permissionless policy-controlled accounts for autonomous fund management), Agent Marketplace (curated directory of agentic services), and Nanopayments (gas-free USDC transfers as small as $0.000001 at machine speed). This creates the financial plumbing for AI agents to discover, evaluate, and pay for SaaS services programmatically — replacing human-mediated procurement workflows.