Suresh Michael
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Agentic Systems

Building Connected Agents: An Overview of Google's ADK and A2A Protocol

An overview of the two halves of Google's agent story: ADK for building agents, and the A2A protocol that lets agents from different frameworks discover each other and collaborate.

Delivered
May 19, 2025
Format
Technical talk
Audience
Developers & architects

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Slides

What we covered

ADK builds the agents; A2A gives them a common language. The session treats them as one story, because an agent that can't talk to anything outside its own framework is a feature, not a system.

  • What AI agents are, and the challenges that make building them harder than they look.
  • ADK as an agent building toolkit: its key features, and a short code example.
  • A walkthrough of an ADK agent, from definition to running.
  • A2A next to MCP: the comparison everyone asks for, and where each protocol belongs.
  • How A2A works: the interaction flow, its core concepts, and how responses and updates come back.
  • ADK and A2A together, and what the combination makes possible that neither does alone.
  • Use cases across industries, and what this means concretely for developers.
  • Next steps and resources.

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