mcp and MCPSharp
These are ecosystem siblings where the official Microsoft MCP specification and reference implementations (A) define the protocol standard that the MCPSharp .NET library (B) implements, allowing .NET developers to build compliant servers and clients against that same standard.
About mcp
microsoft/mcp
Catalog of official Microsoft MCP (Model Context Protocol) server implementations for AI-powered data access and tool integration
Provides core libraries, testing frameworks, and unified engineering infrastructure for building MCP servers that connect LLMs to enterprise data sources like Azure, Fabric, and DevOps platforms. Uses a client-server architecture where hosts initiate connections to MCP servers via stdio transport, enabling standardized context delivery to AI applications across IDEs and assistants. Includes pre-built servers for Azure services, Microsoft Foundry, and developer tools alongside the protocol implementation itself.
About MCPSharp
afrise/MCPSharp
MCPSharp is a .NET library that helps you build Model Context Protocol (MCP) servers and clients - the standardized API protocol used by AI assistants and models.
Implements attribute-based tool exposure with automatic JSON-RPC handling and parameter validation, supporting both stdio and SSE transports. Integrates seamlessly with Microsoft.Extensions.AI and Semantic Kernel, allowing .NET methods to be registered as AIFunctions or KernelFunctions without vendor lock-in. Features dynamic tool registration, resource endpoints, XML documentation extraction, and real-time tool change notifications for connected clients.
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