get-weather
Retrieve current weather conditions for any specified city to support planning and decision-making within ServiceNow workflows.
Instructions
Tool to get the weather of a city
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| city | Yes | The name of the city to get the weather for |
Implementation Reference
- main.ts:43-59 (registration)Registration of the 'get-weather' tool using McpServer.tool, including name, description, input schema, and handler.
server.tool( 'get-weather', 'Tool to get the weather of a city', { city: z.string().describe("The name of the city to get the weather for") }, async ({ city }) => { return { content: [ { type: "text", text: await getWeather({ city }) } ] } } ); - main.ts:49-59 (handler)The MCP tool handler function that invokes the getWeather helper and returns formatted text content.
async ({ city }) => { return { content: [ { type: "text", text: await getWeather({ city }) } ] } } ); - main.ts:46-48 (schema)Zod input schema defining the 'city' parameter as a string.
{ city: z.string().describe("The name of the city to get the weather for") }, - tools/get-weather.js:1-25 (helper)Helper function implementing the core weather fetching logic using Open-Meteo APIs for geocoding and forecast data.
export default async ({ city }) => { try { const response = await fetch(`https://geocoding-api.open-meteo.com/v1/search?name=${city}&count=10&language=en&format=json`); const data = await response.json(); if (!data.results || data.results.length === 0) { return `No results found for city: ${city}`; } let firstResult = data.results[0]; const { latitude, longitude } = firstResult; //return `Coordinates for ${city}: Latitude: ${latitude}, Longitude: ${longitude}`; const weatherResponse = await fetch(`https://api.open-meteo.com/v1/forecast?latitude=${latitude}&longitude=${longitude}&hourly=temperature_2m,precipitation,apparent_temperature,relative_humidity_2m&forecast_days=1`); if (!weatherResponse.ok) { return `Error fetching weather data: ${weatherResponse.statusText}`; } return `Weather data for ${city}:\n` + `Latitude: ${latitude}, Longitude: ${longitude}\n` + `Weather: ${JSON.stringify(await weatherResponse.json(), null, 2)}`; const weatherData = await weatherResponse.json(); return JSON.stringify(weatherData, null, 2); } catch (error) { return `Error fetching weather data: ${error.message}`; } }