> ## Documentation Index
> Fetch the complete documentation index at: https://docs.stackone.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Agent Platforms

> Register StackOne A2A agents in platforms that call an agent by its URL — Gemini Enterprise and Microsoft Foundry.

StackOne A2A agents are standard [A2A](https://a2a-protocol.org/latest/) agents, so platforms that register an agent by URL can call them directly. These guides cover Google's platforms and Microsoft Foundry; any platform that can act as an A2A client works the same way.

<CardGroup cols={2}>
  <Card title="Gemini Enterprise" icon="google" href="/embed/call-actions/agent2agent/gemini-enterprise">
    Use StackOne agents from Google Agent Platform and Gemini Enterprise.
  </Card>

  <Card title="Microsoft Foundry" icon="microsoft" href="/embed/call-actions/agent2agent/microsoft-foundry">
    Connect a Foundry agent to StackOne through the A2A tool.
  </Card>
</CardGroup>