Nest MCP Sse

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