Weather Server Example

A more realistic MCP server that demonstrates multi-tool registration with simulated weather data.

Source: examples/WeatherServer/

Features

• Tool: get_alerts — returns simulated weather alerts for a US state
• Tool: get_forecast — returns simulated weather forecast with location parameters

Running

cmake --preset debug
cmake --build --preset debug
build/debug/examples/WeatherServer/WeatherServer

Key Concepts

The WeatherServer demonstrates:

1. Multiple tool registration — registering two distinct tools (get_alerts, get_forecast) with different signatures and logic
2. Tool parameters — accessing arguments from CallToolRequestParams to read input values (state, latitude, longitude)
3. Text-based responses — returning TextContent results from tool handlers
4. Default fallback — handling missing data with a default response instead of structured errors