Type: url
Original: https://developers.googleblog.com/developers-guide-to-ai-agent-protocols/
Status: generated
Summary
A March 2026 post on Google’s developer blog explains six AI agent protocols — MCP, A2A, UCP, AP2, A2UI and AG-UI — by adding them one at a time to a restaurant supply-chain agent built with Agent Development Kit (ADK). It presents each as removing a specific kind of custom integration code: MCP for tools and data, A2A for remote agents, UCP for commerce checkout, AP2 for payment authorization, A2UI for composing interfaces, and AG-UI for streaming agent events to a frontend, and advises adopting them incrementally as requirements grow.