coredevsushant/mcp.example

🧠 MCP Web API Example with .NET

This repository contains a simple .NET-based MCP Server and Web API integration that demonstrates how to build and connect an API to Claude (Anthropic) using Model Context Protocol (MCP) via stdio.

📂 Projects

• MCP.Server - The bridge server that connects Claude to your backend logic using MCP.
• MCP.WebApi - A simple ASP.NET Core Web API exposing weather forecast data.

✅ Requirements

• .NET 8 SDK
• Claude Desktop App (from Anthropic)
• Git & CLI

🚀 How to Run This with Claude Desktop

1. Clone the Repo and run MCP.WebApi

1. Open MCP.sln
2. Make sure web api is running on https://localhost:44394/
3. Build MCP.Server

2. Configure Claude

1. Open Claude Desktop App.
2. Go to File → Settings → Developer → Edit Config → claude_desktop_config.json.
3. Replace it with the following:

{
    "inputs": [],
    "mcpServers": {
        "weather": {
            "type": "stdio",
            "command": "dotnet",
            "args": [
                "run",
                "--project",
                "D:/MCP.example/MCP.Server",
                "--no-build"
            ]
        }
    }
}

✅ Make sure to update the --project path above to point to your local path for MCP.Server.

3. Restart Claude Desktop

Once the config is updated, restart Claude Desktop. It should automatically pick up the weather MCP server.

4. Test it!

Ask Claude:

Get weather forecast

Claude will call your API using the MCP Server and return 5 randomized forecasts.

Then try:

create new weather entry for 1 May 2025 as temperature will be 30 and it will be very hot

Then try:

what will be temparature for 1 may

📌 Notes

• The MCP.Server communicates with the MCP.WebApi via HTTP under the hood.
• You can extend the API to support POST, PUT, etc., and Claude will pick up those too (if described in your OpenAPI spec).
• This is a great starter template to build your own Claude-interactive backends.

🧠 Inspired by

Anthropic’s Model Context Protocol + .NET 💡
Built by Sushant