Yes, ChatCrystal is free to use.

How do I install ChatCrystal?

ChatCrystal is a local plugin. Install it using npm package: chatcrystal and add the generated configuration snippet to your AI app's MCP config file. Then restart your AI app.

What credentials does ChatCrystal need?

ChatCrystal requires the following credentials or environment variables: CHATCRYSTAL_BASE_URL, CHATCRYSTAL_API_TOKEN. You can find setup instructions on the server detail page.

What AI apps work with ChatCrystal?

ChatCrystal uses the Model Context Protocol (MCP) and works with any MCP-compatible AI app, including Claude, ChatGPT / Codex, Gemini, Copilot, Cursor, and more.

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ChatCrystal MCP Server

by ZengLiangYi

Developer ToolsLow Risk10.0MCP RegistryLocal

Free

Server data from the Official MCP Registry

Local-first AI PKM memory for coding conversations.

About

Local-first AI PKM memory for coding conversations.

Security Report

10.0

Low Risk10.0Low Risk

Valid MCP server (2 strong, 4 medium validity signals). No known CVEs in dependencies. Package registry verified. Imported from the Official MCP Registry.

15 files analyzed · 1 issue found

Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.

Permissions Required

This plugin requests these system permissions. Most are normal for its category.

database

Check that this permission is expected for this type of plugin.

What You'll Need

Set these up before or after installing:

Optional ChatCrystal Core URL. Leave empty to use the local default at http://localhost:3721.Optional

Environment variable: CHATCRYSTAL_BASE_URL

Optional token for a protected ChatCrystal Cloud or remote instance.Required

Environment variable: CHATCRYSTAL_API_TOKEN

How to Install

Add this to your MCP configuration file:

{
  "mcpServers": {
    "io-github-zengliangyi-chatcrystal": {
      "env": {
        "CHATCRYSTAL_BASE_URL": "your-chatcrystal-base-url-here",
        "CHATCRYSTAL_API_TOKEN": "your-chatcrystal-api-token-here"
      },
      "args": [
        "-y",
        "chatcrystal",
        "-y"
      ],
      "command": "npx"
    }
  }
}

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ChatCrystal MCP Server

About

Security Report

Findings (1)

Permissions Required

What You'll Need

How to Install

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