MCPSharp

MCPSharp is a .NET library for building Model Context Protocol (MCP) servers and clients, facilitating communication between AI assistants and models. It allows creating MCP-compliant tools and functions, connecting to MCP servers from C#, and exposing .NET methods as MCP endpoints.

Key features include:

• Integration with Microsoft.Extensions.AI, enabling tools as AIFunctions.
• Semantic Kernel support via KernelFunctionAttribute.
• Dynamic tool registration with custom logic.
• Tool change notifications for clients.
• Complex object parameter support and improved error handling.

Use cases involve:

• Creating tools for AI assistants like Anthropic's Claude Desktop.
• Building MCP-compliant APIs.
• Exposing .NET code as MCP endpoints.
• Adding AI capabilities through standardized interfaces.
• Integrating with Microsoft.Extensions.AI and Semantic Kernel.

The library offers an attribute-based API ([McpTool], [McpResource]), built-in JSON-RPC support, automatic parameter validation, and XML documentation support. Installation is via NuGet.