MCP C# SDK

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Description

The official C# SDK for the Model Context Protocol, maintained in collaboration with Microsoft, enabling developers to build MCP servers and clients in the .NET ecosystem.

Key Features

  • Official C# SDK for Model Context Protocol maintained in collaboration with Microsoft
  • Three-tier package architecture: Core (minimal), Main (hosting+DI), and AspNetCore (HTTP servers)
  • Full MCP client and server implementation for .NET applications and services
  • Cross-application access support via Identity Assertion Authorization Grant flow
  • Dependency injection and hosting extensions for seamless ASP.NET Core integration
  • Comprehensive API documentation and sample projects for quick onboarding

Use Cases

💡 Building MCP servers in .NET to expose tools and resources to LLM applications
💡 Creating MCP clients in C# to connect LLM agents with enterprise data sources
💡 Integrating MCP into existing ASP.NET Core web services with dependency injection
💡 Implementing secure cross-application authentication for multi-tenant MCP deployments
💡 Developing .NET libraries that standardize LLM context integration across services

Tags

mcp csharp sdk api tools

Categories

🔌 MCP Tools

Quick Start

Install via NuGet: 'dotnet add package ModelContextProtocol' (or ModelContextProtocol.AspNetCore for HTTP servers). Follow the Getting Started guide at csharp.sdk.modelcontextprotocol.io for client and server setup examples. Browse the samples directory for complete working examples.
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