ChatCrystal MCP

A local-first AI PKM tool that imports coding conversations from tools like Claude Code and Cursor, distills them into structured notes, and exposes MCP tools for agents to recall and write reusable task memories from a local SQLite and vector index knowledge base.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by ZengLiangYi

Vendor documentation

What you can do with it

Recall relevant coding memories for a specific task
Import and scan AI coding conversation histories
Search knowledge semantically using natural language
Export notes as clean Markdown files

Source and maintenance

Community listingRegistry 0.6.2

mcp-registry: io.github.ZengLiangYi/chatcrystal@0.6.2 Source repository Project website

Maintenance checked: Oct 31, 2026, 10:27 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

chatcrystal 0.6.2

npmnpx

chatcrystal package definition

{
  "version": "0.6.2",
  "transport": "stdio",
  "identifier": "chatcrystal",
  "runtimeHint": "npx",
  "registryType": "npm",
  "packageArguments": [
    {
      "type": "positional",
      "value": "mcp"
    }
  ],
  "runtimeArguments": [
    {
      "type": "positional",
      "value": "-y"
    }
  ],
  "environmentVariables": [
    {
      "name": "CHATCRYSTAL_BASE_URL",
      "description": "Optional ChatCrystal Core URL. Leave empty to use the local default at http://localhost:3721.",
      "placeholder": "https://chatcrystal.example.com"
    },
    {
      "name": "CHATCRYSTAL_API_TOKEN",
      "description": "Optional token for a protected ChatCrystal Cloud or remote instance."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "chatcrystal-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "chatcrystal@0.6.2",
        "mcp"
      ],
      "env": {
        "CHATCRYSTAL_BASE_URL": "<YOUR_CHATCRYSTAL_BASE_URL>",
        "CHATCRYSTAL_API_TOKEN": "<YOUR_CHATCRYSTAL_API_TOKEN>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "chatcrystal-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "chatcrystal@0.6.2",
        "mcp"
      ],
      "env": {
        "CHATCRYSTAL_BASE_URL": "<YOUR_CHATCRYSTAL_BASE_URL>",
        "CHATCRYSTAL_API_TOKEN": "<YOUR_CHATCRYSTAL_API_TOKEN>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "chatcrystal-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "chatcrystal@0.6.2",
        "mcp"
      ],
      "env": {
        "CHATCRYSTAL_BASE_URL": "<YOUR_CHATCRYSTAL_BASE_URL>",
        "CHATCRYSTAL_API_TOKEN": "<YOUR_CHATCRYSTAL_API_TOKEN>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "chatcrystal-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "chatcrystal@0.6.2",
        "mcp"
      ],
      "env": {
        "CHATCRYSTAL_BASE_URL": "<YOUR_CHATCRYSTAL_BASE_URL>",
        "CHATCRYSTAL_API_TOKEN": "<YOUR_CHATCRYSTAL_API_TOKEN>"
      }
    }
  }
}

Let your agent find its tools

Find servers like ChatCrystal MCP from your agent. Add Koskamo once to search the index for endpoints, access requirements, and client setup. Public discovery needs no key.

Connect Koskamo Explore workflows

See all 7,591