ChatCrystal

local MCP server

Installation

Terminal

claude mcp add chatcrystal -e CHATCRYSTAL_BASE_URL=... -e CHATCRYSTAL_API_TOKEN=... -- npx -y chatcrystal

Run in your project folder. Add --scope user to use it everywhere.

Claude Desktop, Cursor & other clients

Add to claude_desktop_config.json or .cursor/mcp.json.

{
  "mcpServers": {
    "chatcrystal": {
      "command": "npx",
      "args": [
        "-y",
        "chatcrystal"
      ],
      "env": {
        "CHATCRYSTAL_BASE_URL": "...",
        "CHATCRYSTAL_API_TOKEN": "..."
      }
    }
  }
}

Fill in the environment variables with your own credentials.

Summary

Local-first AI PKM memory for coding conversations.

Questions

ChatCrystal is a local MCP server distributed as the npm package chatcrystal.

Run: claude mcp add chatcrystal -e CHATCRYSTAL_BASE_URL=... -e CHATCRYSTAL_API_TOKEN=... -- npx -y chatcrystal

Run: codex mcp add chatcrystal --env CHATCRYSTAL_BASE_URL=... --env CHATCRYSTAL_API_TOKEN=... -- npx -y chatcrystal

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