NestJS MCP Module

@bamada

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基本信息

分类

其他

许可证

MIT license

传输方式

stdio

作者

bamada

关于 NestJS MCP Module

NestJS module for seamless Model Context Protocol (MCP) server integration using decorators.

NestJS MCP Module 配置

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NestJS MCP Module 工具

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概览

What is NestJS MCP Module?

A NestJS module that simplifies building Model Context Protocol (MCP) servers. It exposes resources, tools, and prompts using familiar NestJS decorators and supports STDIO and HTTP/SSE transport.

How to use NestJS MCP Module?

Install the package and its peer dependencies, then import McpModule into your root module via forRoot or forRootAsync. Define MCP capabilities by decorating provider methods with @McpResource, @McpTool, or @McpPrompt. Configure the transport type (STDIO or SSE) and run your application. For STDIO, replace the NestJS logger with the included StderrLogger.

Key features of NestJS MCP Module

Seamless MCP integration using NestJS method decorators.
Automatic discovery of decorated providers.
Supports STDIO and HTTP/SSE transport.
Uses Zod schemas for tool and prompt argument validation.
Configurable via forRoot and forRootAsync patterns.
Includes StderrLogger for STDIO transport compatibility.

Use cases of NestJS MCP Module

Building CLI-based MCP servers using STDIO transport.
Exposing MCP endpoints over HTTP/SSE for web clients.
Defining typed MCP tools with parameter validation.
Providing static and template MCP resources.
Creating MCP prompt templates for LLM interactions.

常见问题

What peer dependencies are required?

`@modelcontextprotocol/sdk` (^1.10.2), `@nestjs/platform-express` (^10 or ^11), and `zod` (^3.0.0) must be installed.

How do I configure the transport type?

Pass `transport` in `McpModule.forRoot(options)`. Choose `TransportType.STDIO`, `TransportType.SSE`, or `TransportType.NONE`.

How do I handle logging for STDIO transport?

Replace the NestJS logger with the `StderrLogger` class provided by the module to prevent logs from interfering with STDIO MCP communication.

What endpoints are exposed for HTTP/SSE transport?

The `McpHttpController` exposes `/api/mcp/sse` for SSE connections and `/api/mcp/messages` for message exchange.

What decorators are available for defining MCP capabilities?

`@McpResource`, `@McpTool`, and `@McpPrompt` for resources, tools, and prompts respectively.

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