MarsCalcMCP 0.1.0-beta

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Additional Details

https://devblogs.microsoft.com/dotnet/aspnet-core-2-3-end-of-support/

This is a prerelease version of MarsCalcMCP.
The owner has unlisted this package. This could mean that the package is deprecated, has security vulnerabilities or shouldn't be used anymore. 

                    


                    

                
dotnet tool install --global MarsCalcMCP --version 0.1.0-beta
This package contains a .NET tool you can call from the shell/command line. 
dotnet new tool-manifest
                    


                            if you are setting up this repo
                        

                    

                
dotnet tool install --local MarsCalcMCP --version 0.1.0-beta
This package contains a .NET tool you can call from the shell/command line. 
#tool dotnet:?package=MarsCalcMCP&version=0.1.0-beta&prerelease
                    


                    

                
nuke :add-package MarsCalcMCP --version 0.1.0-beta

$content = @"

MarsCalcMCP

A sample MCP (Model Context Protocol) server implemented in C#/.NET 9. It exposes simple calculator tools over stdio using the MCP C# SDK.

Features

  • Tools: Add, Subtract, Multiply, Divide, IsPrime
  • Stdio transport via Microsoft.Extensions.Hosting
  • Packaged as an MCP server NuGet package
  • Targets .NET 9

Prerequisites

  • .NET SDK 9.0 or later

Build and Run (local)

# From the src directory
dotnet build

# Run the MCP server over stdio
dotnet run
Using from an MCP client
This project includes an MCP server manifest at src/.mcp/server.json. Many MCP-compatible clients can read this file to discover and install the server from NuGet.
Minimal server manifest example:
{
  "$schema": "https://modelcontextprotocol.io/schemas/draft/2025-07-09/server.json",
  "name": "io.github.seaniyer/mcp-for-beginners",
  "description": "An MCP server using the MCP C# SDK.",
  "packages": [
    {
      "registry_name": "nuget",
      "name": "MarsCalcMCP",
      "version": "0.1.0-beta"
    }
  ]
}
Exposed tools
�	Add(numberA: double, numberB: double) -> double
�	Subtract(numberA: double, numberB: double) -> double
�	Multiply(numberA: double, numberB: double) -> double
�	Divide(numberA: double, numberB: double) -> double
�	Throws: "Cannot divide by zero" if numberB is 0
�	IsPrime(number: long) -> bool
Project structure
�	Program.cs: Host builder and MCP server wiring
�	McpCalculatorServer.cs: Tool implementations annotated with [McpServerToolType] / [McpServerTool]
�	.mcp/server.json: MCP server manifest for client discovery
�	calculator.csproj: .NET project and NuGet packaging configuration
Packaging
This project is configured to build a NuGet package as an MCP server.
�	Build and produce the package:
dotnet build -c Release
# Package will be emitted under: src/bin/Release/*.nupkg
�	The project enables:
�	<PackAsTool>true</PackAsTool>
�	<PackageType>McpServer</PackageType>
�	<GeneratePackageOnBuild>true</GeneratePackageOnBuild>
�	<PackageReadmeFile>README.md</PackageReadmeFile>
Notes
�	Transport: stdio
�	Target framework: net9.0
License
See the repository for license details. "@ Set-Content -Path "src/README.md" -Value $content -Encoding UTF8
There are no supported framework assets in this package.

Learn more about Target Frameworks and .NET Standard.

This package has no dependencies.

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