Microsoft Build 2025 is about AI agents, the agentic Web

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Microsoft’s annual Build developer conference, held in Seattle, Washington, focused on the agentic web and artificial intelligence (AI).

Microsoft presented a vision for an “open agentic Web” that would allow AI agents to take decisions and complete tasks in behalf of users and organisations. Microsoft announced its support for Model Context Protocol, also known as MCP, along with NLWeb, an open project that Microsoft compared to HTML for agents.

MCP (Model Context Protocol) is an Open standard enables developers to create secure, bi-directional connections between data sources and AI tools. Microsoft supports MCP on all its platforms and frameworks. The company has also joined the MCP Steering Committee. Microsoft has detailed its contributions to the MCP

. The first is a new authorization specification which will allow users to use trusted sign-in methods in order to grant agents access to data and service. The second contribution is a design for an MCP server register.

Microsoft announced that it would support MCP and also announce its Natural Language (NL), Web open project. The company believes this can play a similar role to HTML on the agentic web.

Microsoft wants to make NLWeb the fastest, easiest way to turn a website into an AI application. NLWeb allows websites to provide a “conversational” interface so that users can interact with content in a semantic manner.

NLWeb endpoints are also MCP servers and allow websites to make their content discoverable and available to AI agents. To learn more, read our separate post on how NLWeb functions. Windows will also be getting some improvements. Microsoft has detailed Windows AI Foundry which is an evolution from Copilot Runtime. AI Foundry is a unified AI platform that supports AI developers. It includes capabilities such as Windows ML, Foundry local and ready-to use AI APIs powered with built-in Windows models on Copilot Plus PCs.

Microsoft has also announced native MCP support in Windows 11 as well as plans to open source the Windows Subsystem For Linux (WSL). The company has introduced Semantic Search APIs, which developers can use to create powerful new search features on devices.

Updates to coding agents for GitHub, Copilot Tuning and Studio and more are also notable announcements.

GitHub will get a first-of its-kind asynchronous coding agents, and Microsoft will update GitHub Models to include prompt management, enterprise control, and more. GitHub Copilot chat is also open-sourced in VS Code.

Microsoft 365 Copilot Tuning allows companies to use their data, workflows, and processes to create agents and train models with little to no coding. These agents can perform domain-specific tasks inside the Microsoft 365 service boundary. Copilot Studio also allows for multi-agent orchestration by connecting multiple agents to handle more complex task.

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