Jazz

A Model Context Protocol (MCP) server that enables AI assistants to interact with local-first apps built with the Jazz framework.

What is this?

The Jazz MCP Server allows AI assistants like Claude, ChatGPT, and others to:

• Create, read, update, and delete data in Jazz applications
• Sync data between devices using Jazz's distributed state capabilities
• Manage authentication and user profiles
• Work with rich text, media, and other data types supported by Jazz

Prerequisites

• Node.js 22.x or higher
• npm or pnpm
• A Jazz application to connect to (or create one with npx create-jazz-app@latest)

Installation

1. Clone this repository:

   git clone https://github.com/bensleveritt/jazz-mcp-server.git
   cd jazz-mcp-server
   

2. Install dependencies:

   npm install
   # or with pnpm
   pnpm install
   

3. Copy the environment example file and configure it for your needs:

   cp .env.example .env
   

4. Build the server:

   npm run build
   # or with pnpm
   pnpm build
   

Usage

Start the MCP server:

npm start
# or with pnpm
pnpm start

For development with auto-restart:

npm run dev
# or with pnpm
pnpm dev

Connecting AI Assistants

The server exposes an MCP-compatible API at http://localhost:3000 (or your configured host/port).

In Cursor

1. Open a project in Cursor
2. Click on the Cursor AI settings
3. Add a custom MCP server with the URL http://localhost:3000
4. Use the API key configured in your .env file (if auth is enabled)

In Other AI Assistants

Follow the relevant documentation for your AI assistant to connect to an MCP server at the URL http://localhost:3000.

Available Tools

This MCP server provides the following tools for AI assistants:

• jazz.listApps - List available Jazz applications
• jazz.getAppData - Get data from a Jazz application
• jazz.updateAppData - Update data in a Jazz application
• jazz.createAppData - Create new data in a Jazz application
• jazz.deleteAppData - Delete data from a Jazz application
• jazz.auth.createUser - Create a new user
• jazz.auth.login - Log in an existing user

Development

The server is built with TypeScript and uses the official MCP protocol implementation.

Key files:

• src/index.ts - Main entry point
• src/config.ts - Configuration loading
• src/server.ts - MCP server implementation
• src/tools/ - Individual tool implementations
• src/jazz/ - Jazz integration

License

MIT