Create Interactive UIs for Microsoft 365 Copilot agents with MCP Apps

MCP Apps let declarative agents render interactive UI widgets inline in Microsoft 365 Copilot chat. Learn what they are, how they work, and when to use them over adaptive cards.

Add an MCP server with an interactive React widget to an existing Microsoft 365 Copilot declarative agent project, from package.json to testing tools and resources with the MCP Inspector. (Part 2 of 4)

Register an MCP Apps server with a Microsoft 365 Copilot declarative agent by creating the RemoteMCPServer plugin manifest, attaching it to the agent, and rewriting the instructions to drive interactive widgets. (Part 3 of 4)

Wire an MCP Apps server into the Microsoft 365 Agents Toolkit F5 experience - dev tunnel, environment variables, widget builds, and a background server task - so one keypress launches the whole declarative agent. (Part 4 of 4)