mcpdotnet.extensions.semantickernel
Microsoft SemanticKernel integration for the Model Context Protocol (MCP). Enables seamless use of MCP tools as AI functions.
Documentation
!Project Icon ModelContextProtocol.SemanticKernel
Microsoft SemanticKernel integration for the Model Context Protocol using the csharp-sdk.
Enables seamless use of MCP tools as AI functions.
> [!NOTE]
> This project is in preview; breaking changes can be introduced without prior notice.
π¦ NuGet packages
| Stef.ModelContextProtocol.SemanticKernel |  |
|---|---|
| Stef.ModelContextProtocol.Schema |  |
Overview
---
title: "Overview"
---
graph LR;
SK[Semantic Kernel'OpenAI']
MCPClient[MCPClient'Function Calling']
MCPServer[Local MCP Server'server-github']
GitHub[GitHub]
SK MCPClient
MCPClient MCPServer
MCPServer GitHubβοΈ Usage
Use an extension method to register a specific MCP function/tool
Register single function or tool
// π‘Stdio
await kernel.Plugins.AddMcpFunctionsFromStdioServerAsync("GitHub", "npx", ["-y", "@modelcontextprotocol/server-github"]);
// π‘SSE
await kernel.Plugins.AddMcpFunctionsFromSseServerAsync("GitHub", new Uri("http://localhost:12345"));Register MCP Server(s) from Claude Desktop configuration
It's also possible to register all Stdio MCP Servers which are registered in Claude Desktop:
// π‘Stdio MCP Tools defined in claude_desktop_config.json
await kernel.Plugins.AddToolsFromClaudeDesktopConfigAsync(cancellationToken: cts.Token);π» Full Stdio Example
Code
var builder = Kernel.CreateBuilder();
builder.Services.AddLogging(c => c.AddDebug().SetMinimumLevel(LogLevel.Trace));
builder.Services.AddOpenAIChatCompletion(
serviceId: "openai",
modelId: "gpt-4o-mini",
apiKey: Environment.GetEnvironmentVariable("OPENAI_API_KEY")!);
var kernel = builder.Build();
// π‘ Add this line to enable MCP functions from a Stdio server named "Everything"
await kernel.Plugins.AddMcpFunctionsFromStdioServerAsync("Everything", "npx", ["-y", "@modelcontextprotocol/server-github"]);
var executionSettings = new OpenAIPromptExecutionSettings
{
Temperature = 0,
FunctionChoiceBehavior = FunctionChoiceBehavior.Auto()
};
var prompt = "Please call the echo tool with the string 'Hello Stef!' and give me the response as-is.";
var result = await kernel.InvokePromptAsync(prompt, new(executionSettings)).ConfigureAwait(false);
Console.WriteLine($"\n\n{prompt}\n{result}");Result
Please call the echo tool with the string 'Hello Stef!' and give me the response as-is.
Echo: Hello Stef!π» Full SSE (Server-Sent Events) Example
Code
var builder = Kernel.CreateBuilder();
builder.Services.AddLogging(c => c.AddDebug().SetMinimumLevel(LogLevel.Trace));
builder.Services.AddOpenAIChatCompletion(
serviceId: "openai",
modelId: "gpt-4o-mini",
apiKey: Environment.GetEnvironmentVariable("OPENAI_API_KEY")!);
var kernel = builder.Build();
// π‘ Add this line to enable MCP functions from a Sse server named "Github"
// - Note that a server must be running at the specified URL
await kernel.Plugins.AddMcpFunctionsFromSseServerAsync("GitHub", "http://localhost:12345");
var executionSettings = new OpenAIPromptExecutionSettings
{
Temperature = 0,
FunctionChoiceBehavior = FunctionChoiceBehavior.Auto()
};
var prompt = "Summarize the last 3 commits to the StefH/FluentBuilder repository.";
var result = await kernel.InvokePromptAsync(prompt, new(executionSettings)).ConfigureAwait(false);
Console.WriteLine($"\n\n{prompt}\n{result}");Result
Summarize the last 3 commits to the StefH/FluentBuilder repository.
Here are the summaries of the last three commits to the `StefH/FluentBuilder` repository:
1. **Commit [2293880](https://github.com/StefH/FluentBuilder/commit/229388090f50a39f489e30cb535f67f3705cf61f)** (January 30, 2025)
- **Author:** Stef Heyenrath
- **Message:** Update README.md
- **Details:** This commit updates the README.md file. The commit was verified and is valid.
2. **Commit [ae27064](https://github.com/StefH/FluentBuilder/commit/ae2706424c3b75613bf5625091aa2649fb33ecde)** (November 6, 2024)
- **Author:** Stef Heyenrath
- **Message:** Update README.md
- **Details:** This commit also updates the README.md file. The commit was verified and is valid.
3. **Commit [53096a8](https://github.com/StefH/FluentBuilder/commit/53096a8b54a1029532425bc727fdd831e9ed0092)** (October 20, 2024)
- **Author:** Stef Heyenrath
- **Message:** Update README.md
- **Details:** This commit updates the README.md file as well. The commit was verified and is valid.
All three commits involve updates to the README.md file, reflecting ongoing improvements or changes to the documentation.π References
- https://modelcontextprotocol.io
- https://github.com/PederHP/mcpdotnet
- https://github.com/modelcontextprotocol/csharp-sdk
- https://devblogs.microsoft.com/semantic-kernel/integrating-model-context-protocol-tools-with-semantic-kernel-a-step-by-step-guide/
Sponsors
Entity Framework Extensions and Dapper Plus are major sponsors and proud to contribute to the development of ModelContextProtocol-SemanticKernel.


Frequently asked questions
What is mcpdotnet.extensions.semantickernel?
mcpdotnet.extensions.semantickernel is Microsoft SemanticKernel integration for the Model Context Protocol (MCP). Enables seamless use of MCP tools as AI functions.
How do I install mcpdotnet.extensions.semantickernel?
Open the GitHub repository and follow its README. Most MCP servers are added to your client's MCP config, then called by your agent.
Is mcpdotnet.extensions.semantickernel open source?
Yes β it is hosted on GitHub at https://github.com/StefH/McpDotNet.Extensions.SemanticKernel and has 34 stars.
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