Nest MCP Sse

@HxinY499

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HxinY499

关于 Nest MCP Sse

基于nest快速开发sse mcp server

#nestjs #sse #mcp-server

Nest MCP Sse 配置

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Nest MCP Sse 工具

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概览

What is nest-mcp-sse?

nest-mcp-sse is a dynamic NestJS module that lets you quickly build SSE-based MCP servers. It handles Transport lifecycle and McpServer instantiation so you can focus on MCP tool development, without wrapping the official SDK’s native methods.

How to use nest-mcp-sse?

Install the package alongside @modelcontextprotocol/sdk and zod. Import McpModule in your NestJS module and configure it with register, forRoot or forFeature. After registration, you can inject McpServerService to get a native McpServer instance (via getServer) and register tools with the SDK’s original API. SSE and message endpoints are automatically created.

Key features of nest-mcp-sse

Quickly create MCP servers in NestJS applications
Manage multiple MCP Server instances
Automatic SSE connection lifecycle handling
Does not wrap native McpServer SDK methods
Supports custom SSE and message endpoint names

Use cases of nest-mcp-sse

Exposing MCP tools via SSE in an existing NestJS app
Running multiple MCP server instances within one NestJS application
Rapid prototyping of MCP tools without managing low-level Transport details

常见问题

How is nest-mcp-sse different from using the MCP SDK directly?

It only manages McpServer instances and SSE Transport — it does not wrap any native SDK methods, so you use the original SDK API unchanged.

What are the runtime requirements?

Node.js, a NestJS project, and the peer dependencies `@modelcontextprotocol/sdk` and `zod`.

How is data stored or transmitted?

The server communicates via SSE (Server-Sent Events) over HTTP. No external database is required.

How do I access the SSE and message endpoints?

Endpoints are `/{controllerBaseUrl}/{serverId}/sse` and `/{controllerBaseUrl}/{serverId}/messages`. Their names can be customized with `sseEndpoint` and `messagesEndpoint` options.

How does authentication work?

The README does not mention built-in authentication. You can add NestJS guards to the generated endpoints for authorization.

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