mcp-nordic

Instructions

Implementation Reference

• src/servers/norwegian-weather.js:153-182 (handler)

  The handler function for the 'no_weather_forecast' tool, which fetches weather data based on the provided location and hours.

      async ({ location, hours }) => {
        try {
          const loc = await getLocation(location);
          const data = await fetchForecast(loc.lat, loc.lon);
          const ts = data.properties.timeseries;
          const maxHours = hours || 24;
          const slice = ts.slice(0, maxHours);
  
          const lines = [`## ${loc.name} — ${maxHours}h Forecast\n`];
          for (const entry of slice) {
            const t = new Date(entry.time);
            const time = t.toLocaleString("nb-NO", { timeZone: "Europe/Oslo", weekday: "short", day: "numeric", month: "short", hour: "2-digit", minute: "2-digit" });
            const inst = entry.data.instant.details;
            const symbol = entry.data.next_1_hours?.summary?.symbol_code
              || entry.data.next_6_hours?.summary?.symbol_code || "";
            const precip = entry.data.next_1_hours?.details?.precipitation_amount;
            lines.push(`**${time}:** ${inst.air_temperature}°C, ${symbolToText(symbol)}, wind ${inst.wind_speed} m/s${precip != null ? `, ${precip} mm` : ""}`);
          }
          lines.push(`\n*MET Norway Locationforecast 2.0*`);
          return { content: [{ type: "text", text: lines.join("\n") }] };
        } catch (err) {
          return { content: [{ type: "text", text: `Error: ${err.message}` }], isError: true };
        }
      }
    );
  }

• src/servers/norwegian-weather.js:146-152 (registration)

  Tool registration for 'no_weather_forecast' including name, description, and input schema.

  server.tool(
    "no_weather_forecast",
    "Get weather forecast for a location in Norway using MET Norway (yr.no). Returns hourly data for the next N hours.",
    {
      location: z.string().describe("Norwegian city name or lat,lon coordinates"),
      hours: z.number().min(1).max(72).optional().describe("Hours ahead to forecast (default 24, max 72)"),
    },