nest-mcp

Overview

nest-mcp provides a comprehensive framework for building Model Context Protocol (MCP) servers, clients, and gateways using the familiar NestJS ecosystem. It offers structured packages for server implementation with decorators, authentication, resilience patterns, and multi-transport support. The framework enables developers to leverage existing NestJS knowledge while implementing MCP functionality through tools, resources, and prompts defined via TypeScript decorators. The gateway functionality allows aggregation of multiple upstream MCP servers behind a unified endpoint.

Try asking AI

After installing, here are 5 things you can ask your AI assistant:

• greet

  Greet a user by name

  Try:Greet JohnTry:Say hello to AliceTry:Introduce yourself to Bob

Note: Only one tool example was provided in the README. No explicit list of all available tools was documented.

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Installation

# Server — expose tools/resources to AI clients
npm install @nest-mcp/server @modelcontextprotocol/sdk zod@^4

# Client — call tools on a remote MCP server
npm install @nest-mcp/client @modelcontextprotocol/sdk zod@^4

# Gateway — aggregate multiple servers into one
npm install @nest-mcp/gateway @modelcontextprotocol/sdk zod@^4

# Install NestJS peer dependencies if not already installed
npm install @nestjs/common @nestjs/core reflect-metadata rxjs

{
  "mcpServers": {
    "nest-mcp": {
      "command": "node",
      "args": ["path/to/your/server.js"]
    }
  }
}

FAQ

What transport protocols does nest-mcp support?

The framework supports Streamable HTTP, SSE (Server-Sent Events), and STDIO transports for MCP servers and clients.

Can I use nest-mcp with existing NestJS applications?

Yes, nest-mcp integrates seamlessly with existing NestJS applications through modules, dependency injection, and decorators.

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