How to use A2aAgent for Sequential Agent

[ktk94]

Add two sub-agents to the sequential agent and deploy that sequential agent to the A2aAgent
I want supervisor agents already deployed as A2aAgent to send requests to sequential agents in A2A-protocol format, but don't they support that function?

[adk-bot]

Response from ADK Answering Agent (experimental, answer may be inaccurate)

TLDR: Yes, you can deploy a SequentialAgent as an A2A service and have other agents communicate with it using the A2A protocol. This is a supported feature in ADK.

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Hello! Based on the information in the ADK documentation, here's how you can achieve your goal:

1. Exposing SequentialAgent as an A2A Service: Any ADK agent, including a SequentialAgent, can be exposed as an Agent-to-Agent (A2A) service. [1] You can do this in a couple of ways:

   • Using the CLI: When you deploy your agent, use the --a2a flag: adk deploy cloud_run --a2a.
   • Using code: You can use the to_a2a() utility to convert your agent into an A2A-compatible service that can be served with uvicorn. [2]

2. Communicating with the SequentialAgent: Your "supervisor" agent (the one making the requests) can communicate with the deployed SequentialAgent by using a RemoteA2aAgent. This RemoteA2aAgent acts as a local proxy or "tool" that represents the remote SequentialAgent. [3]

In your case, you would:

• Deploy your SequentialAgent with its sub-agents as an A2A service.
• In your supervisor agent, instantiate a RemoteA2aAgent that points to the URL of your deployed SequentialAgent.
• The supervisor agent can then send requests to the RemoteA2aAgent just like it would with any other local tool.

This setup allows you to build complex, distributed workflows where a SequentialAgent can handle a specific, ordered task as part of a larger multi-agent system. [4, 5]

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References:
[1] Introduction to Agent-to-Agent Communication
[2] Exposing an Agent as an A2A Service
[3] ADK Knowledge Agent README
[4] Sequential Agents
[5] Agent-to-Agent Communication Overview

[ktk94]

I've got a sequential agent that's wrapped by the A2aagent on the agent engine, and I've got a supervisor agent on the agent engine as the A2aagent
Does the A2A protocol work well in that structure, and does the Sequential Agent work well sequentially