27. Agent Authentication (Google ADK - OAuth2.0 Auth Code Grant Type)

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Authenticating agents is a very interesting problem to solve. Reason being it involves many moving parts - Agent client, Agent runtime, MCP/OpenAPI tooling layer and the actual backend the agent is talking to. And of course throw in that mix the actual user whose identity the Agent is supposed to assume.

Google’s Agent Development Kit (ADK), solves this. But to learn and demonstrate it you need the following components

1. An IDP
2. An actual application (accessed by Agent’s tools)
3. An Agent

An end to end sample we recently put together in the ADK official repo has all of these, and it helps you learn and demonsterate agent autentication from your local machine!

And since the video is worth a zillion words - go ahead and check out the demo video.

Demo

The demo covers the following -

1. The setup needed (basically cloing and setting up the environment)
2. Configuring and running various components (IDP, Application and the Agent)
3. Demo Run
4. Code explanation

The links to the code are provided below.

Demo Video

Please watch in full screen or on youtube directly

Setup steps

Everything you need is documented really well - here.

Thank you for reading through, Please like 👍, share with your network 🔗 and comment ✍ if you found it useful.

Thank you!

-Nikhil

Further reading / listening

• Google ADK - OpenAPI Tools
• Authenticating with Tools