A week in October 2025 saw the x402 protocol’s transactions jump 10,780%, reaching almost half a million payments. Before x402, AI agents relied on API keys, subscription tiers, manual setups or credit cards—each adding security risks, inefficiencies or fees that broke automated workflows. Now agents pay themselves in USDC stablecoins, on a strict pay-per-request basis, without human steps. Transactions clear globally at near-zero cost. The real shift comes as AI agents gain autonomy. They need reliable rails to buy compute, services or data. x402 fills that gap. It isn’t a fringe crypto experiment: heavyweights like Coinbase, Cloudflare, Google Cloud, PayPal Ventures and General Catalyst back it. Their support signals infrastructure-grade credibility, not a speculative token play. x402’s emphasis on stablecoins turns crypto into everyday utility. Micropayments—once too costly or cumbersome—are now seamless. An AI model can request a dataset, trigger a payment in USDC, and get instant access. No intermediaries, no delays. Among the most aligned projects are Coinbase and its Base layer, GoKite AI, Chainbase and PlayAI Network. Others like EigenLayer, Mantle, peaq, Gate and Cardano also integrate well. Pieverse and OlaxBT sit further out—partially aligned but worth watching as they develop their own microtransaction solutions.