Microsoft Dev Blogs

Build a Model Context Protocol (MCP) server in C#

thumbnail

Table of Contents

  1. Building an MCP server
  2. Starting up our server
  3. Integrating with our own data and APIs
  4. Publish your MCP server
  5. Go even further with MCP

Building an MCP server

To build an MCP server using C#, start by creating a new console application and adding the necessary NuGet packages for the MCP C# SDK. The server can be configured to expose tools and APIs from the running assembly.

Starting up our server

Update the server code to create the MCP server with standard server transport settings and the ability to discover available tools. This allows you to run and test your server locally.

Integrating with our own data and APIs

Integrate existing APIs or services into the MCP server to query real data that can be used by clients. Register services with the .NET dependency service and define methods that call into these services to make data available as tools.

Publish your MCP server

Create container images for the .NET app to easily publish and share the MCP server. Add necessary project file configurations for containerization and use CLI commands to push the images to container registries.

Go even further with MCP

Continue building new functionality into your MCP server to provide valuable services for your company or community. Explore advanced tutorials and samples in the MCP C# SDK to further leverage the power of MCP.

By following these steps and utilizing the MCP C# SDK, you can create robust MCP servers and clients, enhancing your development workflow and enabling seamless integration with tools like GitHub Copilot.