Agent to UI Protocol (A2UI) with Agent Development Kit (ADK)

atamel@gmail.com (Mete Atamel) — Mon, 30 Mar 2026 00:00:00 +0000

A2UI and ADK

In my Agent Protocols - MCP, A2A, A2UI, AG-UI post, I provided a high-level overview of some of the main agent protocols: MCP, A2A, A2UI, and AG-UI. In the Agent-User Interaction Protocol (AG-UI) with Agent Development Kit (ADK) post, I zoomed into the AG-UI protocol and showed how it can be used with Google’s Agent Development Kit (ADK).

In today’s post, I’ll zoom into the A2UI protocol and show how it can be used with Google’s Agent Development Kit (ADK).

Agent Protocols - MCP, A2A, A2UI, AG-UI

atamel@gmail.com (Mete Atamel) — Tue, 17 Mar 2026 00:00:00 +0000

Agent Protocols: MCP, A2A, A2UI, AG-UI

It feels like every other month, there is a new agent protocol and it’s getting hard to keep track of which protocol is used when. Recently, I looked into some of the main agent protocols and in this post, I will provide a high-level overview of MCP, A2A, A2UI, and AG-UI.

TLDR

If you’re too busy or too impatient to read the whole blog post, here’s a summary of the protocols along with links to samples in my repository:

A2UI on Atamel.Dev

Agent to UI Protocol (A2UI) with Agent Development Kit (ADK)

Agent Protocols - MCP, A2A, A2UI, AG-UI

TLDR