> ## 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.

# Microsoft Foundry

> Connect a Microsoft Foundry agent to StackOne through Foundry's A2A tool.

An agent built in [Microsoft Foundry](https://learn.microsoft.com/en-us/azure/foundry/agents/how-to/tools/agent-to-agent) (Azure AI Foundry Agent Service) can call a StackOne agent through Foundry's **A2A tool**. Your Foundry agent stays in control of the conversation and calls the StackOne agent to search and execute actions.

<Note>
  Microsoft Foundry's A2A tool is in public preview on Microsoft's side. StackOne agent cards work with it.
</Note>

In the [Foundry portal](https://ai.azure.com/), create a connection to the StackOne agent endpoint, then attach it to your agent:

1. Go to **Tools** and select **Connect tool**.
2. On the **Custom** tab, select **Agent2Agent (A2A)**, then **Create**.
3. Enter a **Name** and the StackOne **A2A Agent Endpoint**: `https://a2a.stackone.com`.
4. Under **Authentication**, add the two StackOne headers: `Authorization: Basic <base64 of apikey:>` and `x-account-id: <account_id>` — configured as custom headers so Foundry sends them on the agent-card fetch and on every message. See [Authentication](/embed/call-actions/agent2agent#calling-actions).
5. Add the A2A tool to your agent, referencing the connection. Foundry reads the StackOne agent card, and your agent can then call it.

For the full setup, including Python, C#, JavaScript, Java, and REST examples, see Microsoft's guide: [Connect to an A2A agent endpoint from Foundry Agent Service](https://learn.microsoft.com/en-us/azure/foundry/agents/how-to/tools/agent-to-agent).