NestJS MCP Server Module

npm install @rekog/mcp-nest @modelcontextprotocol/sdk zod@^4

import { McpModule } from '@rekog/mcp-nest';
import { Module } from '@nestjs/common';

@Module({
  imports: [
    McpModule.forRoot({
      name: 'my-mcp-server',
      version: '1.0.0',
    }),
  ],
})
export class AppModule {}

import { Injectable } from '@nestjs/common';
import { Tool, Context } from '@rekog/mcp-nest';
import { z } from 'zod';

@Injectable()
export class GreetingTool {
  @Tool({
    name: 'greeting-tool',
    description: 'Returns a personalized greeting',
    parameters: z.object({
      name: z.string().default('World'),
    }),
  })
  async sayHello({ name }: { name: string }, context: Context) {
    await context.reportProgress({ progress: 50, total: 100 });
    return `Hello, ${name}!`;
  }
}

import { Module } from '@nestjs/common';
import { GreetingTool } from './greeting.tool';

@Module({
  providers: [GreetingTool],
})
export class GreetingModule {}

npm run start:dev

{
  "mcpServers": {
    "my-nestjs-mcp": {
      "url": "http://localhost:3000/mcp/sse"
    }
  }
}