Extending 365 Copilot Declarative Agents with API Plugins in VS Code

Organizations want to leverage their proprietary data and services directly within AI assistants to streamline workflows. This written course teaches you how to extend 365 Copilot by building custom declarative agents that connect securely to external APIs. By reading this guide and studying the code examples, you will understand the architecture of declarative agents, design API plugins, and render rich data directly inside the chat interface. What you'll learn: - Understand the core architecture of declarative agents and how they interact with 365 Copilot. - Design and configure API plugins using OpenAPI specifications in VS Code. - Render structured data dynamically using Adaptive Card templates. - Configure secure authentication flows to connect agents with protected APIs. - Test and debug your plugins using local environment mockups and modern developer tools. The course starts with foundational concepts of declarative extensibility before moving into hands-on API schema construction and integration. You will progress from basic agent definitions to secure authentication patterns through structured text explanations and detailed code walk-throughs. This course is designed for software developers and technical analysts who are new to AI agent extensibility, with no prior Copilot development experience required. Start building your first intelligent agent integration today.