MCP C# SDK
Official C# SDK for building MCP servers and clients, maintained with Microsoft.
Updated
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Use cases
About MCP C# SDK
MCP C# SDK is listed in our MCP servers category and is aimed at builders. Official C# SDK for building MCP servers and clients, maintained with Microsoft. Pricing, as the maker states it: Open source. Maturity: Active. We last checked the official link on 2026-10-16.
What is MCP C# SDK?
The MCP C# SDK is the official C# SDK for the Model Context Protocol, letting .NET applications, services and libraries implement MCP clients and servers.
It ships packages such as ModelContextProtocol.Core for projects that only need client or low-level server APIs. Our listing notes it is maintained with Microsoft.
Sources: the official README and our directory listing, checked 2026-10-18. Official site: csharp.sdk.modelcontextprotocol.io.
Who is MCP C# SDK for?
.NET developers building MCP servers or clients.
MCP C# SDK at a glance
- Open source: Yes (Apache License 2.0 (moving from MIT; docs under CC BY 4.0))
- GitHub: modelcontextprotocol/csharp-sdk · 4,592 stars (as of Oct 21, 2026)
Key features
- Official C#/.NET MCP SDK
- Clients and servers
- Modular packages
MCP C# SDK FAQ
What is MCP C# SDK?
The MCP C# SDK is the official C# SDK for the Model Context Protocol, letting .NET applications, services and libraries implement MCP clients and servers.
Who is MCP C# SDK for?
.NET developers building MCP servers or clients.
Is MCP C# SDK free?
MCP C# SDK's pricing, as the maker states it: Open source. Open-source tools are free to use, though you may still pay for model API usage or a hosted plan. Check the official site for current plans.
Is MCP C# SDK open source?
Yes. MCP C# SDK is released under the Apache License 2.0 (moving from MIT; docs under CC BY 4.0), according to its GitHub repository.
What are alternatives to MCP C# SDK?
Similar tools include MCP Python SDK, MCP TypeScript SDK, MCP Java SDK, MCP PHP SDK, MCP Go SDK and MCP Kotlin SDK.
MCP C# SDK ratings and reviews
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MCP C# SDK alternatives
Other MCP servers tools in our directory. See all MCP servers tools →
MCP Python SDK
Official Python SDK for building Model Context Protocol servers and clients.
MCP TypeScript SDK
Official TypeScript SDK for building MCP servers and clients.
MCP Java SDK
Official Java SDK for MCP servers and clients.
MCP PHP SDK
Official PHP SDK for building MCP servers and clients, maintained with the PHP Foundation and Symfony.
MCP Go SDK
Official Go SDK for building Model Context Protocol servers and clients, maintained with Google.
MCP Kotlin SDK
Official Kotlin Multiplatform SDK for building MCP servers and clients on JVM, Native, JS and Wasm, maintained with JetBrains.
Related lists
🏆 Ranked in: Context7 alternatives
🔁 Listed in: Context7 alternatives
🧭 Task guides: Agent frameworks and SDKs for building MCP servers
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