ygavrishov/mcp-server-sandbox

Real Weather MCP Server

The app provides current weather information and weather forecast via MCP interface.

Supported Tools

1. GetCurrentWeather - Get current weather for a specified location
2. GetWeatherForecast - Get weather forecast for a specified location
3. GetWeatherAlerts - Get weather alerts/warnings for a location

All methods use the same input parameters - city and countryCode (optional).

How to Setup

OpenWeatherMap API Keys

The app uses OpenWeatherMap API under the hood, so it's necessary to provide your own API key to have the service working. There are 2 ways to do that:

• if the app is running in Kubernetes, put OpenWeatherMapApiKey into a secret and attach it to the pods.
• the other universal way is to set the same environment variable for the application environment.

To get the API key from OpenWeatherMap you need to:

• sign up in https://openweathermap.org/
• go to My API key profile area, copy API key there.

It would be better to create a separate API key to use in the app with a meaningful name.

NOTE 1: Please also be aware that the API key can be not yet activated for hours.

NOTE 2: For GetCurrentWeather you can use a free tier API key. For 2 others you will need One Call API 3.0 subscription.

How to Run

The app is not yet published as a NuGet package is it's a simple demo so the app can be built and run from the sources. For that follow the steps:

• Open the app in Visual Studio Code. You need to install all the updates in advance and setup GitHub Copilot extension.
• Switch Copilot to Chat mode
• Change Built-in mode from Ask to Agent
• Button Tools will be marked as having a one another tool to setup. Press Refresh.
• If everything is done properly, the Select tool dropdown shows 3 weather methods (Image 1).
• To test the app ask Copilot Give me current weather in London, UK. Image 2 is the expected result.

Image 1: Methods provided by the MCP server.

Image 2: A sample request execution.

Thanks for reading! 🌤️