MCP Server Starter

import { ResourceTemplate } from "@modelcontextprotocol/sdk/server/mcp.js"; import type { RegisterableModule } from "../registry/types.js"; import type { McpServer} from "@modelcontextprotocol/sdk/server/mcp.js"; type TimestampFormat = "iso" | "unix" | "readable"; const MIME_TYPE_PLAIN = "text/plain"; const VALID_FORMATS: Array<TimestampFormat> = ["iso", "unix", "readable"]; const timestampModule: RegisterableModule = { type: "resource", name: "timestamp", description: "Get current timestamp in various formats", register(server: McpServer) { server.registerResource( "timestamp", new ResourceTemplate("timestamp://{format}", { list: () => ({ resources: [ { uri: "timestamp://iso", name: "ISO 8601 format" }, { uri: "timestamp://unix", name: "Unix timestamp" }, { uri: "timestamp://readable", name: "Human-readable format" }, ], }), complete: { format: (value) => { const normalizedValue = value.toLowerCase(); return VALID_FORMATS.filter(f => f.toLowerCase().startsWith(normalizedValue) ); }, }, }), { name: "Timestamp", description: "Get current timestamp in various formats", }, (uri, { format }) => { const now = new Date(); let timestamp: string; if (format === undefined) { return { contents: [ { uri: uri.href, mimeType: MIME_TYPE_PLAIN, text: "Format not specified. Use 'iso', 'unix', or 'readable'", }, ], }; } if (!VALID_FORMATS.includes(format as TimestampFormat)) { return { contents: [ { uri: uri.href, mimeType: MIME_TYPE_PLAIN, text: `Unknown format: ${String(format)}. Use 'iso', 'unix', or 'readable'`, }, ], }; } const validFormat = format as TimestampFormat; switch (validFormat) { case "iso": timestamp = now.toISOString(); break; case "unix": timestamp = Math.floor(now.getTime() / 1000).toString(); break; case "readable": timestamp = now.toLocaleString(); break; default: { const exhaustiveCheck: never = validFormat; return exhaustiveCheck; } } return { contents: [ { uri: uri.href, mimeType: "text/plain", text: timestamp, }, ], }; } ); } }; export default timestampModule;