Agent-to-Agent Communication: Connecting Foundry and LangGraph Agents via A2A

As AI systems move from single agents to multi-agent workflows, one challenge becomes obvious: how do agents built in different frameworks discover each other, communicate, and collaborate reliably? This post walks through a practical Agent-to-Agent (A2A) integration between Microsoft Foundry and LangGraph, showing how a Foundry agent can call a LangGraph agent hosted on Azure Container Apps. Prerequisites for the Tutorial: Azure Subscription Microsoft Foundry resource deployed in a resource group.