C# MCP Server Creation

Create Model Context Protocol servers using the official C# SDK (ModelContextProtocol NuGet package) and the dotnet new mcpserver project template. Servers expose tools, prompts, and resources that LLMs can discover and invoke via the MCP protocol.

When to Use

• Starting a new MCP server project from scratch
• Adding tools, prompts, or resources to an existing MCP server
• Choosing between stdio (--transport local) and HTTP (--transport remote) transport
• Setting up ASP.NET Core hosting for an HTTP MCP server
• Wrapping an external API or service as MCP tools

Stop Signals

• Server already exists and needs debugging? → Use mcp-csharp-debug
• Need tests or evaluations? → Use mcp-csharp-test
• Ready to publish? → Use mcp-csharp-publish
• Building an MCP client, not a server → This skill is server-side only