The Agent Protocol Stack, Explained: MCP vs A2A vs AG-UI — and What to Actually Adopt in 2026
中文摘要
AI智能体协议正形成类似TCP/IP的架构堆栈，涵盖MCP、A2A、AG-UI及支付层，为智能体互操作性构建基础。
English Summary
AI agent protocols like MCP, A2A, and AG-UI are forming a functional stack similar to TCP/IP, providing the necessary infrastructure for future agent interoperability.
Original Excerpt
Agent protocols had their TCP/IP moment: MCP, A2A, AG-UI, and the payment layer now form a real stack. What each one does, who governs it… Continue reading on Medium »