csharp-sdk
The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.
Install / Use
claude mcp add modelcontextprotocol -- npx -y github:modelcontextprotocol/csharp-sdkIf the server publishes to npm under a different name, use that package instead — check the repo README.
MCP Server
Model Context Protocol server
Quality Score
Category
Development & EngineeringSupported Platforms
Tags
Our assessment of csharp-sdk
csharp-sdk scores 79/100 on our quality scale, 3605th of 4,611 Development & Engineering skills we index.
Its MCP Server is 3.9 KB long, split into 6 sections and no code examples: a solid amount of guidance for an agent.
With 4,617 GitHub stars, it is one of the more widely adopted skills in the catalogue.
Maintenance, license and trust
- The repository was last updated today, so csharp-sdk is actively maintained.
- Our last check on 2026-10-21 found the source still online.
- No license is declared. By default that means all rights are reserved: you can read it, but reusing or redistributing it is not clearly permitted. Ask the author before building on it commercially.
- Its trust signals score 88/100, with 1 caution from licensing, adoption, age or documentation. These come from repository metadata, not a code audit — read the skill file before letting an agent act on it.
Safety scan
No issues foundOur scan of the whole file found no instruction hijacking, hidden characters, credential access, data exfiltration or destructive commands. An AI review of the same text found nothing harmful.
AI review by kimi-k2.7-code on 2026-09-24. Automated pattern scan on 2026-09-24. It catches known dangerous patterns, not every risk — read a skill before letting an agent act on it.
csharp-sdk compared with similar skills
All 4 of these similar skills score higher than csharp-sdk; compare them before choosing.
| Skill | Score | Stars | Updated | Format |
|---|---|---|---|---|
| csharp-sdk (this skill)by modelcontextprotocol | 79 | 4.6k | today | MCP Server |
| taste-skillby Leonxlnx | 100 | 110.8k | 1d ago | CLAUDE.md |
| Agent-Reachby Panniantong | 100 | 109.3k | today | CLAUDE.md |
| headroomby headroomlabs-ai | 100 | 79.0k | today | CLAUDE.md |
| ai-job-searchby ai-job-search-dev | 100 | 69.9k | today | CLAUDE.md |
Frequently asked questions
- How do I install csharp-sdk?
- Run
claude mcp add modelcontextprotocol -- npx -y github:modelcontextprotocol/csharp-sdk. The install tabs above show the steps for each supported agent. - Which AI agents does csharp-sdk work with?
- It is written for Claude Code and Claude Desktop, as a MCP Server file. Other agents that read the same format can often use it too.
- Is csharp-sdk safe to use?
- Our scan of the whole file found no instruction hijacking, hidden characters, credential access, data exfiltration or destructive commands. An AI review of the same text found nothing harmful. It declares no license and scores 88/100 on trust signals. Skills are instructions an agent will follow, so read the file before installing it and do not approve commands you do not understand.
- Is csharp-sdk still maintained?
- The repository was last updated today, so csharp-sdk is actively maintained.
Skill content
View source on GitHubMCP C# SDK
The official C# SDK for the Model Context Protocol, enabling .NET applications, services, and libraries to implement and interact with MCP clients and servers. Please visit the API documentation for more details on available functionality.
Packages
The SDK packages are:
-
ModelContextProtocol.Core
- For projects that only need to use the client or low-level server APIs and want the minimum number of dependencies. -
ModelContextProtocol
- The main package with hosting and dependency injection extensions. References ModelContextProtocol.Core. This is the right fit for most projects that don't need HTTP server capabilities. -
ModelContextProtocol.AspNetCore
- The library for HTTP-based MCP servers. References ModelContextProtocol. -
ModelContextProtocol.Extensions.Apps
- MCP Apps extension for building interactive UI applications that render inside MCP hosts. -
ModelContextProtocol.Extensions.Tasks
- MCP Tasks extension for running long-running tool invocations asynchronously with status polling and input requests.
Getting Started
To get started, see the Getting Started guide in the conceptual documentation for installation instructions, package-selection guidance, and complete examples for both clients and servers.
You can also browse the samples directory and the API documentation for more details on available functionality.
About MCP
The Model Context Protocol (MCP) is an open protocol that standardizes how applications provide context to Large Language Models (LLMs). It enables secure integration between LLMs and various data sources and tools.
For more information about MCP:
Cross-Application Access (Identity Assertion Authorization Grant flow)
The SDK provides support for the Identity Assertion Authorization Grant flow
via IdentityAssertionGrantProvider. See the Cross-Application Access section in the transport docs for full usage details.
License
This project is licensed under the Apache License 2.0.
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Trust signals
From repository metadata: license, adoption, age and documentation. Not a code audit — see the Safety scan above for what the skill file itself contains.