Remove build
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.gitignore
vendored
2
.gitignore
vendored
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node_modules
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#build
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build
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165
build/index.js
165
build/index.js
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import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
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import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
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import { z } from "zod";
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const NWS_API_BASE = "https://api.weather.gov";
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const USER_AGENT = "weather-app/1.0";
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// Create server instance
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const server = new McpServer({
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name: "weather",
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version: "1.0.0",
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capabilities: {
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resources: {},
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tools: {},
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},
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});
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// Helper function for making NWS API requests
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async function makeNWSRequest(url) {
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const headers = {
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"User-Agent": USER_AGENT,
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Accept: "application/geo+json",
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};
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try {
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const response = await fetch(url, { headers });
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if (!response.ok) {
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throw new Error(`HTTP error! status: ${response.status}`);
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}
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return (await response.json());
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}
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catch (error) {
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console.error("Error making NWS request:", error);
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return null;
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}
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}
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// Format alert data
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function formatAlert(feature) {
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const props = feature.properties;
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return [
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`Event: ${props.event || "Unknown"}`,
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`Area: ${props.areaDesc || "Unknown"}`,
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`Severity: ${props.severity || "Unknown"}`,
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`Status: ${props.status || "Unknown"}`,
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`Headline: ${props.headline || "No headline"}`,
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"---",
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].join("\n");
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}
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// Register weather tools
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server.tool("get-alerts", "Get weather alerts for a state", {
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state: z.string().length(2).describe("Two-letter state code (e.g. CA, NY)"),
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}, async ({ state }) => {
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const stateCode = state.toUpperCase();
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const alertsUrl = `${NWS_API_BASE}/alerts?area=${stateCode}`;
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const alertsData = await makeNWSRequest(alertsUrl);
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if (!alertsData) {
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return {
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content: [
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{
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type: "text",
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text: "Failed to retrieve alerts data",
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},
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],
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};
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}
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const features = alertsData.features || [];
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if (features.length === 0) {
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return {
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content: [
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{
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type: "text",
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text: `No active alerts for ${stateCode}`,
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},
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],
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};
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}
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const formattedAlerts = features.map(formatAlert);
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const alertsText = `Active alerts for ${stateCode}:\n\n${formattedAlerts.join("\n")}`;
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return {
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content: [
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{
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type: "text",
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text: alertsText,
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},
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],
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};
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});
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server.tool("get-forecast", "Get weather forecast for a location", {
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latitude: z.number().min(-90).max(90).describe("Latitude of the location"),
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longitude: z
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.number()
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.min(-180)
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.max(180)
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.describe("Longitude of the location"),
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}, async ({ latitude, longitude }) => {
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// Get grid point data
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const pointsUrl = `${NWS_API_BASE}/points/${latitude.toFixed(4)},${longitude.toFixed(4)}`;
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const pointsData = await makeNWSRequest(pointsUrl);
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if (!pointsData) {
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return {
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content: [
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{
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type: "text",
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text: `Failed to retrieve grid point data for coordinates: ${latitude}, ${longitude}. This location may not be supported by the NWS API (only US locations are supported).`,
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},
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],
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};
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}
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const forecastUrl = pointsData.properties?.forecast;
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if (!forecastUrl) {
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return {
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content: [
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{
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type: "text",
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text: "Failed to get forecast URL from grid point data",
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},
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],
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};
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}
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// Get forecast data
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const forecastData = await makeNWSRequest(forecastUrl);
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if (!forecastData) {
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return {
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content: [
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{
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type: "text",
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text: "Failed to retrieve forecast data",
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},
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],
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};
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}
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const periods = forecastData.properties?.periods || [];
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if (periods.length === 0) {
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return {
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content: [
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{
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type: "text",
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text: "No forecast periods available",
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},
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],
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};
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}
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// Format forecast periods
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const formattedForecast = periods.map((period) => [
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`${period.name || "Unknown"}:`,
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`Temperature: ${period.temperature || "Unknown"}°${period.temperatureUnit || "F"}`,
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`Wind: ${period.windSpeed || "Unknown"} ${period.windDirection || ""}`,
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`${period.shortForecast || "No forecast available"}`,
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"---",
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].join("\n"));
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const forecastText = `Forecast for ${latitude}, ${longitude}:\n\n${formattedForecast.join("\n")}`;
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return {
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content: [
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{
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type: "text",
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text: forecastText,
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},
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],
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};
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});
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async function main() {
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const transport = new StdioServerTransport();
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await server.connect(transport);
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console.error("Weather MCP Server running on stdio");
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}
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main().catch((error) => {
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console.error("Fatal error in main():", error);
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process.exit(1);
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});
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