Developer’s Guide to AI Agent Protocols

Source: Google Developers Blog

Overview

This guide introduces a suite of six protocols—such as MCP and A2A—designed to eliminate custom integration code by standardizing how AI agents access data and communicate.

Example: Kitchen Manager Agent

Using a “kitchen manager” agent as a practical example, the guide demonstrates how these tools handle complex tasks, including:

• Real‑time inventory checks
• Wholesale commerce via UCP
• Secure payment authorization through AP2

Agent Development Kit (ADK)

By leveraging the Agent Development Kit (ADK), developers can also implement:

• A2UI – for interactive dashboards
• AG‑UI – for seamless streaming interfaces to users