ZenStack Auth Server

A Model Context Protocol (MCP) Streamable HTTP server supporting auto-generated CRUD tools of database with Authorization and credential Authentication.

Features

• MCP Streamable HTTP Protocol: Multiple simultaneous MCP server connections with credential Authentication support.
• ZenStack Integration: Automatically generates MCP tools for the CRUD operations of the models defined in the ZenStack schema. This demo will use a simple blog application with User and Post models.

Auto-generated Tools

The server automatically generates MCP tools for each model defined in the ZenStack schema. Here are the supported tools:

• findUnique
• findFirst
• findMany
• create
• createMany
• delete
• deleteMany
• update
• updateMany
• upsert
• aggregate
• groupBy
• count

You can opt-in available tools for functionNames variable in mcp-server.ts

Quick Start

1. Install dependencies:

   npm install
   

2. Set up the database:

   npx zenstack generate
   npx prisma db push
   

3. Seed the database (optional):

   npx prisma db seed
   

   It create 3 users with posts. The passwords for all users are password123.

   • [email protected]
   • [email protected]
   • [email protected]

4. Start the server:

   npm run dev
   

Testing the MCP Server

MCP Inspector

The easiest way to test the MCP server is to run

npx @modelcontextprotocol/inspector

MCP Client

If your chosen MCP client supports remote OAuth2 MCP server, you can directly connect. Otherwise, you can use mcp-remote to do it All the most popular MCP clients (Claude Desktop, Cursor, Github Copilot) use the following config format:

{
    "servers": {
        "my-mcp-server": {
            "command": "npx",
            "args": ["-y", "mcp-remote", "http://localhost:3001/mcp"]
        }
    }
}

Troubleshooting

Clear your ~/.mcp-auth directory

If you encounter an invalid client error when connecting to the MCP server, it may be due to that mcp-remote only register oauth client for the first time.you can fix it by removing the cached client state:

rm -rf ~/.mcp-auth

Delete old versions of Node in NVM for Claude Desktop

When using Claude Desktop, if you didn't see any OAuth window open in your browser, it may be due to the fact that Claude Desktop is using an old version of Node.js even if you have a newer version installed. You can fix it by deleting old versions of Node.js in NVM.