Custom Engine Agents now generally available—build and integrate your own AI into the flow of workMicrosoft 365 Copilot is redefining how people interact with AI—embedding it directly into the flow of work as the intuitive, natural interface for agents: the ‘UI for AI’As Copilot becomes the interface for AI in the workplace, we’re seeing grow...

Read how the Retrieval API gives developers a secure, compliant and scalable way to integrate enterprise content into their AI workflows.

Introducing Dev Proxy v0.29, with a major architectural overhaul, control over language model prompts, and improved diagnostics.

The latest version of Dev Proxy introduces a new ability to help you understand language models’ usage and costs in your applications, alongside many improvements to mocking, TypeSpec generation, and plugin flexibility.

Take a deep dive into Athena, an AI-powered collaborative agent, to learn how it was built and how to create your own version of Athena right within Microsoft Teams.

As part of the expanding capabilities for agents across Microsoft 365, Office Platform announces add-in actions for Copilot agents are available in preview. This blog is an overview of all the new capabilities across the platform: APIs, developer tools, and add-in distribution options—making it simpler to build new or iterate on JavaScript add-ins.

Read how the Microsoft 365 Agents Toolkit, an evolution of Microsoft Teams Toolkit, is designed to help developers build agents and apps for Microsoft 365 Copilot, Microsoft Teams, and Microsoft 365.

Learn how Microsoft 365 Copilot APIs allow you to build solutions grounded in your organization’s content, context, and permissions, without needing to relocate or duplicate data.

Get started with Nested App Authentication, a modern protocol for simplifying authentication for Personal Tab Teams apps that run across Microsoft 365.

Dev Proxy v0.27 is even more developer-friendly, helping you generate API specs faster, improving suggestions while editing, and laying the foundation for more flexible AI integrations.