Proof Launches x401, the Open Protocol for Verifying the Authority Behind AI Agents

Developed by Proof with contributors across payments, identity and AI, x401 lets any online service request proof of who authorized an agent’s actions. Live demos and a CLI are available today. AI agents can now buy, sign, build, publish and move money. What they can’t carry is proof of who authorized the agent. Every company […]

Last updated Jun 26, 2026 by ATDb automated enrichment