Task Manager MCP Server

#!/usr/bin/env node import { Server } from '@modelcontextprotocol/sdk/server/index.js'; import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js'; import { CallToolRequestSchema, ListToolsRequestSchema, Tool, } from '@modelcontextprotocol/sdk/types.js'; import { Storage } from './storage.js'; // Define our tools const TOOLS: Tool[] = [ { name: 'add_task', description: 'Add a new task to the task list', inputSchema: { type: 'object', properties: { title: { type: 'string', description: 'The title of the task', }, description: { type: 'string', description: 'Optional description of the task', }, }, required: ['title'], }, }, { name: 'list_tasks', description: 'List all tasks, optionally filtered by completion status', inputSchema: { type: 'object', properties: { completed: { type: 'boolean', description: 'Filter by completion status (true for completed, false for incomplete, omit for all)', }, }, }, }, { name: 'update_task', description: 'Update an existing task', inputSchema: { type: 'object', properties: { id: { type: 'string', description: 'The ID of the task to update', }, title: { type: 'string', description: 'New title for the task', }, description: { type: 'string', description: 'New description for the task', }, completed: { type: 'boolean', description: 'New completion status', }, }, required: ['id'], }, }, { name: 'delete_task', description: 'Delete a task by ID', inputSchema: { type: 'object', properties: { id: { type: 'string', description: 'The ID of the task to delete', }, }, required: ['id'], }, }, { name: 'complete_task', description: 'Mark a task as completed', inputSchema: { type: 'object', properties: { id: { type: 'string', description: 'The ID of the task to complete', }, }, required: ['id'], }, }, ]; // Create server instance const server = new Server( { name: 'task-manager', version: '1.0.0', }, { capabilities: { tools: {}, }, } ); // Initialize storage const storage = new Storage(); // Handle tool listing server.setRequestHandler(ListToolsRequestSchema, async () => { return { tools: TOOLS }; }); // Handle tool execution server.setRequestHandler(CallToolRequestSchema, async (request) => { const { name, arguments: args } = request.params; if (!args) { return { content: [ { type: 'text', text: 'No arguments provided', }, ], isError: true, }; } try { switch (name) { case 'add_task': { const task = await storage.addTask( args.title as string, args.description as string | undefined ); return { content: [ { type: 'text', text: `Task created successfully:\n${JSON.stringify(task, null, 2)}`, }, ], }; } case 'list_tasks': { let tasks = await storage.getTasks(); // Filter by completion status if specified if (args.completed !== undefined) { tasks = tasks.filter(t => t.completed === args.completed); } return { content: [ { type: 'text', text: tasks.length > 0 ? JSON.stringify(tasks, null, 2) : 'No tasks found', }, ], }; } case 'update_task': { const updates: any = {}; if (args.title !== undefined) updates.title = args.title; if (args.description !== undefined) updates.description = args.description; if (args.completed !== undefined) updates.completed = args.completed; const task = await storage.updateTask(args.id as string, updates); if (!task) { return { content: [ { type: 'text', text: `Task with ID ${args.id} not found`, }, ], isError: true, }; } return { content: [ { type: 'text', text: `Task updated successfully:\n${JSON.stringify(task, null, 2)}`, }, ], }; } case 'delete_task': { const deleted = await storage.deleteTask(args.id as string); if (!deleted) { return { content: [ { type: 'text', text: `Task with ID ${args.id} not found`, }, ], isError: true, }; } return { content: [ { type: 'text', text: `Task ${args.id} deleted successfully`, }, ], }; } case 'complete_task': { const task = await storage.completeTask(args.id as string); if (!task) { return { content: [ { type: 'text', text: `Task with ID ${args.id} not found`, }, ], isError: true, }; } return { content: [ { type: 'text', text: `Task completed:\n${JSON.stringify(task, null, 2)}`, }, ], }; } default: return { content: [ { type: 'text', text: `Unknown tool: ${name}`, }, ], isError: true, }; } } catch (error) { return { content: [ { type: 'text', text: `Error: ${error instanceof Error ? error.message : String(error)}`, }, ], isError: true, }; } }); // Start the server async function main() { await storage.initialize(); const transport = new StdioServerTransport(); await server.connect(transport); console.error('Task Manager MCP Server running on stdio'); } main().catch((error) => { console.error('Fatal error:', error); process.exit(1); });