MCP TODO Server

import { Resolver, Tool } from '@nestjs-mcp/server'; import { z } from 'zod'; import { CreateTodoDto } from './dto/create-todo.dto'; import { UpdateTodoDto } from './dto/update-todo.dto'; import { TodoService } from './todo.service'; @Resolver() export class TodoResolver { constructor(private readonly todoService: TodoService) {} @Tool({ name: 'todo_create', description: 'Create a new TODO item', paramsSchema: { title: z.string().min(3).describe('The title of the todo item'), description: z.string().optional().describe('Optional description'), }, }) async create(createTodoDto: CreateTodoDto) { const todo = this.todoService.create(createTodoDto); return { content: [ { type: 'text', text: `Created TODO: ${JSON.stringify(todo)}` }, ], }; } @Tool({ name: 'todo_list', description: 'List all TODO items', }) async findAll() { const todos = this.todoService.findAll(); return { content: [{ type: 'text', text: JSON.stringify(todos, null, 2) }], }; } @Tool({ name: 'todo_get', description: 'Get a specific TODO item by ID', paramsSchema: { id: z.number().describe('The ID of the todo item'), }, }) async findOne({ id }: { id: number }) { const todo = this.todoService.findOne(id); return { content: [{ type: 'text', text: JSON.stringify(todo, null, 2) }], }; } @Tool({ name: 'todo_update', description: 'Update an existing TODO item', paramsSchema: { id: z.number().describe('The ID of the todo item to update'), title: z.string().optional().describe('New title'), description: z.string().optional().describe('New description'), completed: z.boolean().optional().describe('Completion status'), }, }) async update({ id, ...updateTodoDto }: UpdateTodoDto & { id: number }) { const todo = this.todoService.update(id, updateTodoDto); return { content: [ { type: 'text', text: `Updated TODO: ${JSON.stringify(todo)}` }, ], }; } @Tool({ name: 'todo_delete', description: 'Delete a TODO item', paramsSchema: { id: z.number().describe('The ID of the todo item to delete'), }, }) async remove({ id }: { id: number }) { this.todoService.remove(id); return { content: [ { type: 'text', text: `Successfully deleted TODO with ID ${id}` }, ], }; } }