ChatCrystal

Overview

ChatCrystal is a Model Context Protocol server that brings local-first AI personal knowledge management to your coding conversations. It captures and organizes memory from your interactions, letting Claude, Cursor, and other AI assistants access your coding context as callable tools rather than forcing you to manually share information between applications.

The server runs entirely on your machine via the npm command npx -y chatcrystal, speaking MCP over stdio to your preferred editor or IDE. Version v0.5.7 is published under the Apache-2.0 license with full source code available at ZengLiangYi/ChatCrystal on GitHub, where the project has gained 55 stars. You'll need an API key to authenticate.

ChatCrystal is listed in the Development category on mcp.site and works with all major MCP clients including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, and Zed. If you maintain this project, claim your listing to earn a Verified badge and keep the information up to date.

Installation

// claude_desktop_config.json
{
  "mcpServers": {
    "chatcrystal": {
      "command": "npx",
      "args": [
        "-y",
        "chatcrystal"
      ]
    }
  }
}