mcp-nordic

Instructions

Implementation Reference

• src/servers/danish-weather.js:215-246 (handler)

  The handler function for dk_compare_weather which fetches and compares weather data for two locations.

  async ({ location1, location2 }) => {
    try {
      const [loc1, loc2] = await Promise.all([getLocation(location1), getLocation(location2)]);
      const [data1, data2] = await Promise.all([
        openMeteoFetch({
          latitude: loc1.lat, longitude: loc1.lon,
          current: "temperature_2m,apparent_temperature,precipitation,weather_code,wind_speed_10m,cloud_cover",
        }),
        openMeteoFetch({
          latitude: loc2.lat, longitude: loc2.lon,
          current: "temperature_2m,apparent_temperature,precipitation,weather_code,wind_speed_10m,cloud_cover",
        }),
      ]);
      const c1 = data1.current, c2 = data2.current;
      const wx1 = WMO_CODES[c1.weather_code] || "", wx2 = WMO_CODES[c2.weather_code] || "";
      const lines = [
        `## Weather Comparison\n`,
        `| | ${loc1.name} | ${loc2.name} |`,
        `|---|---|---|`,
        `| **Conditions** | ${wx1} | ${wx2} |`,
        `| **Temperature** | ${c1.temperature_2m}°C | ${c2.temperature_2m}°C |`,
        `| **Feels like** | ${c1.apparent_temperature}°C | ${c2.apparent_temperature}°C |`,
        `| **Wind** | ${c1.wind_speed_10m} km/h | ${c2.wind_speed_10m} km/h |`,
        `| **Cloud cover** | ${c1.cloud_cover}% | ${c2.cloud_cover}% |`,
        `| **Precipitation** | ${c1.precipitation} mm | ${c2.precipitation} mm |`,
        `\n*DMI HARMONIE 2km model*`,
      ];
      return { content: [{ type: "text", text: lines.join("\n") }] };
    } catch (err) {
      return { content: [{ type: "text", text: `Error: ${err.message}` }], isError: true };
    }
  }

• src/servers/danish-weather.js:208-214 (registration)

  Registration of the dk_compare_weather tool, including its name, description, and input schema.

  server.tool(
    "dk_compare_weather",
    "Compare current weather between two Danish locations side by side. Useful for deciding between destinations or comparing conditions across the country.",
    {
      location1: z.string().describe("First location (city name, postal code, or coordinates)"),
      location2: z.string().describe("Second location"),
    },