ALL ABOUT X402

Summary from the TLDR Crypto newsletter

x402 is an open payment specification, originated at Coinbase, that embeds pricing, authorization, and settlement into API workflows, allowing machines and AI agents to pay for calls using stablecoins without OAuth flows or account setup. As delegated purchasing authority expands from narrow API credits to broader agentic decisions, the protocol stands to reshape how APIs, data, and compute are priced and traded between software systems. Cloudflare, AWS, Google, and Fastly are each integrating agent payment capabilities into their existing infrastructure businesses, competing on different layers of the value capture stack. Outstanding questions around data precision, service quality guarantees, trust mechanisms, and payment rail neutrality will determine whether x402 matures into a unified market or fragments across competing implementations.