GXtract MCP Server

GXtract is a Model Context Protocol (MCP) server designed to integrate with VS Code and other compatible editors. It provides a suite of tools for interacting with the GroundX platform, enabling you to leverage its powerful document understanding capabilities directly within your development environment.

Features
Architecture
Prerequisites
Installing UV
Quick Start: VS Code Integration
Available Tools
Configuration
- API Key Security
Development
Documentation
- Building Documentation Locally
- Building Documentation (Sphinx)
Cache Management
Dependency Management
- Working with Dependencies
- The uv.lock File
Versioning
License

Features

GroundX Integration: Access GroundX functionalities like document search, querying, and semantic object explanation.
MCP Compliant: Built for use with VS Code's MCP client and other MCP-compatible systems.
Efficient and Modern: Developed with Python 3.12+ and FastMCP v2 for performance.
Easy to Configure: Simple setup for VS Code.
Caching: In-memory cache for GroundX metadata to improve performance and reduce API calls.

Architecture

The high-level system architecture of GXtract illustrates how the components interact:

graph TB
    subgraph "Client"
        VSC[VS Code / Editor]
    end

    subgraph "GXtract MCP Server"
        MCP[MCP Interface<br>stdio/http]
        Server[GXtract Server]
        Cache[Metadata Cache]
        Tools[Tool Implementations]
    end

    subgraph "External Services"
        GXAPI[GroundX API]
    end

    VSC -->|MCP Protocol| MCP
    MCP --> Server
    Server --> Tools
    Tools -->|Query| GXAPI
    Tools -->|Read/Write| Cache
    Cache -.->|Refresh| GXAPI

This diagram shows:

Client Integration: VS Code communicates with GXtract using the MCP protocol
Transport Layer: Supports both stdio (for direct VS Code integration) and HTTP transport
Core Components: Server manages tool registration and requests
Caching Layer: Maintains metadata to reduce API calls
Tool Implementation: Provides specialized functions for interacting with GroundX
API Communication: Secure connection to GroundX platform

For more detailed architecture information, see the full documentation.

Prerequisites

Python 3.12 or higher.
UV (Python package manager): Version 0.7.6 or higher. You can install it from astral.sh/uv.
GroundX API Key: You need a valid API key from the GroundX Dashboard.

Installing UV

Before you can use GXtract, you need to install UV (version 0.7.6 or higher), a modern Python package manager written in Rust that offers significant performance improvements over traditional tools.

Quick Installation Methods

Windows (PowerShell 7):

powershell -c "irm https://astral.sh/uv/install.ps1 | iex"

macOS and Linux:

curl -LsSf https://astral.sh/uv/install.sh | sh

Alternative Installation Methods

Using pip:

pip install --upgrade uv

Using Homebrew (macOS):

brew install uv

Using pipx (isolated environment):

pipx install uv

After installation, verify that UV is working correctly:

uv --version

This should display version 0.7.6 or higher. For more information about UV, visit the official documentation.

Quick Start: VS Code Integration

Clone the GXtract Repository:

git clone <repository_url>  # Replace <repository_url> with the actual URL
cd gxtract

Install Dependencies using UV: Open a terminal in the gxtract project directory and run:
```
uv sync
```
This command creates a virtual environment (if one doesn't exist or isn't active) and installs all necessary dependencies specified in pyproject.toml and uv.lock.
Set GroundX API Key: The GXtract server requires your GroundX API key. You need to make this key available as an environment variable named GROUNDX_API_KEY. VS Code will pass this environment variable to the server based on the configuration below. Ensure GROUNDX_API_KEY is set in the environment where VS Code is launched, or configure your shell profile (e.g., .bashrc, .zshrc, PowerShell Profile) to set it.

Option 1: Using Environment Variables (as shown above)

This approach reads the API key from your system environment variables:
```
"env": {
    "GROUNDX_API_KEY": "${env:GROUNDX_API_KEY}"
}
```
Option 2: Using VS Code's Secure Inputs

VS Code can prompt for your API key and store it securely. Add this to your settings.json:
```
"inputs": [
  {
    "type": "promptString",
    "id": "groundx-api-key",
    "description": "GroundX API Key",
    "password": true
  }
]
```
Then reference it in your server configuration:
```
"env": {
    "GROUNDX_API_KEY": "${input:groundx-api-key}"
}
```
With this approach, VS Code will prompt you for the API key the first time it launches the server, then store it securely in your system's credential manager (Windows Credential Manager, macOS Keychain, or similar).

Configure VS Code settings.json: Open your VS Code settings.json file (Ctrl+Shift+P, then search for "Preferences: Open User Settings (JSON)"). Add or update the mcp.servers configuration:

"mcp": {
    "servers": {
       "gxtract": { // You can name this server entry as you like, i.e. GXtract
            "command": "uv",
            "type": "stdio", // 💡 http is also supported but VS Code only supports stdio currently
            "args": [
                // Adjust the path to your gxtract project directory if it's different
                "--directory", 
                "DRIVE:\\path\\to\\your\\gxtract", // Example: C:\\Users\\yourname\\projects\\gxtract
                "--project",
                "DRIVE:\\path\\to\\your\\gxtract", // Example: C:\\Users\\yourname\\projects\\gxtract
                "run",
                "gxtract", // This matches the script name in pyproject.toml
                "--transport",
                "stdio" // 💡 Ensure this matches the "type" above
            ],
            "env": {
                // Option 1: Using environment variables (system-wide)
                "GROUNDX_API_KEY": "${env:GROUNDX_API_KEY}"

                // Option 2: Using secure VS Code input (uncomment to use)
                // "GROUNDX_API_KEY": "${input:groundx-api-key}"
            }
        }
    }
}

If using Option 2 (secure inputs), add this section (settings.json):

// 💡 Only needed for Option 2 (secure inputs)
"inputs": [
    {
        "type": "promptString",
        "id": "groundx-api-key",
        "description": "GroundX API Key",
        "password": true
    }
]

Important:

Replace "DRIVE:\\path\\to\\your\\gxtract" with the absolute path to the gxtract directory on your system.
The "command": "uv" assumes uv is in your system's PATH. If not, you might need to provide the full path to the uv executable.
The server name "GXtract" in settings.json is how it will appear in VS Code's MCP interface.

Reload VS Code: After saving settings.json, you might need to reload VS Code (Ctrl+Shift+P, "Developer: Reload Window") for the changes to take effect.
Using GXtract Tools: Once configured, you can access GXtract's tools through VS Code's MCP features (e.g., via chat @ mentions if your VS Code version supports it, or other MCP integrations).

Available Tools

GXtract provides the following tools for interacting with GroundX:

groundx/searchDocuments: Search for documents within your GroundX projects.
groundx/queryDocument: Ask specific questions about a document in GroundX.
groundx/explainSemanticObject: Get explanations for diagrams, tables, or other semantic objects within documents.
cache/refreshMetadataCache: Manually refresh the GroundX metadata cache.
cache/refreshCachedResources: Manually refresh the GroundX projects and buckets cache.
cache/getCacheStatistics: Get statistics about the cached metadata.
cache/listCachedResources: List all currently cached GroundX resources (projects, buckets).

Configuration

The server can be configured via command-line arguments when run directly. When used via VS Code, these are typically set in the args array in settings.json.

--transport {stdio|http}: Communication transport type (default: http, but stdio is used for VS Code).
--host TEXT: Host address for HTTP transport (default: 127.0.0.1).
--port INTEGER: Port for HTTP transport (default: 8080).
--log-level {DEBUG|INFO|WARNING|ERROR|CRITICAL}: Logging level (default: INFO).
--log-format {text|json}: Log output format (default: text).
--disable-cache: Disable the GroundX metadata cache.
--cache-ttl INTEGER: Cache Time-To-Live in seconds (default: 3600).

API Key Security

The GroundX API key is sensitive information that should be handled securely. GXtract supports several approaches to provide this key:

Environment Variables (recommended for development):
- Set GROUNDX_API_KEY in your system or shell environment
- VS Code will pass it to the server using ${env:GROUNDX_API_KEY} in settings.json
VS Code Secure Storage (recommended for shared workstations):
- Configure VS Code to prompt for the key and store it securely
- Uses your system's credential manager (Windows Credential Manager, macOS Keychain)
- Setup using the inputs section in settings.json as shown in the Quick Start
Direct Environment Variable in VS Code settings (not recommended):
- It's possible to set the key directly in settings.json: "GROUNDX_API_KEY": "your-api-key-here"
- This is not recommended as it stores the key in plaintext in your settings.json file

Always ensure your API key is not committed to source control or shared with unauthorized users.

Development

To set up for development:

Clone the repository.
Navigate to the gxtract directory.
Create and activate a virtual environment using uv:
```
uv venv # Create virtual environment in .venv
```
- Activate with Windows PowerShell:
```
.\.venv\Scripts\Activate.ps1
```
- Activate with Linux/macOS bash/zsh:
```
source .venv/bin/activate 
```
Install main project dependencies into the virtual environment:
```
uv sync # Install main dependencies from pyproject.toml
```
Development tools (like Ruff, Pytest, Sphinx, etc.) are managed by Hatch and will be installed automatically into a separate environment when you run Hatch scripts (see below). Alternatively, to explicitly create or ensure the Hatch 'default' development environment is set up:
```
hatch env create default # Ensure your main .venv is active first
```
If you need to force a complete refresh of this environment, you can remove it first with 'hatch env remove default' before running 'hatch env create default'.

Run linters/formatters (this will also install them via Hatch if not already present):

uv run lint
uv run format

Documentation

The full documentation for GXtract is available at https://sascharo.github.io/gxtract/.

Building Documentation Locally

If you want to build and view the documentation locally:

Ensure you have installed all development dependencies:
```
uv sync
```
Build the documentation:
```
uv run hatch -e default run docs-build
```
Serve the documentation locally:
```
uv run hatch -e default run docs-serve
```
Open your browser and navigate to http://127.0.0.1:8000

Building Documentation (Sphinx)

The project documentation is built using Sphinx. The following Hatch scripts are available to manage the documentation:

Build Documentation:
```
uv run docs-build
```
This command generates the HTML documentation in the docs/sphinx/build/html directory.
Serve Documentation Locally:
```
uv run docs-serve
```
This starts a local HTTP server (usually at http://127.0.0.1:8000) to preview the documentation. You can specify a different port if needed, e.g., uv run docs-serve 8081.
Clean Documentation Build:
```
uv run docs-clean
```
This command removes the docs/sphinx/build directory, cleaning out old build artifacts.

Ensure your virtual environment is active before running these commands.

Cache Management

GXtract maintains an in-memory cache of GroundX metadata (projects and buckets) to improve performance and reduce API calls. While this cache is automatically populated during server startup and periodically refreshed, there are situations when you may need to manually refresh the cache.

When to Manually Refresh the Cache

You should manually refresh the cache when:

You've recently created new projects or buckets in your GroundX account and want them to be immediately available in GXtract.
You see warnings in the server logs about cache population failures.
You're experiencing issues with project or bucket lookup when using GXtract tools.

How to Refresh the Cache

Using VS Code's MCP Interface

If your VS Code version supports MCP chat interfaces:

Open VS Code's chat interface.
Use the @GXtract mention (or whatever name you assigned to the server in your settings).

Type a command to refresh the cache:

@GXtract Please refresh the GroundX metadata cache

The VS Code interface will use the appropriate cache refresh tool.

Using Direct JSON-RPC Requests

If you have access to the server through HTTP (when not using stdio transport), you can make direct requests:

curl -X POST http://127.0.0.1:8080/jsonrpc -H "Content-Type: application/json" -d '{
  "jsonrpc": "2.0",
  "method": "cache/refreshMetadataCache",
  "params": {},
  "id": "refresh-req-001"
}'

Troubleshooting Common Cache Issues

Warning: "No projects (groups) found or 'groups' attribute missing in API response"

This warning indicates that:

Your API key might not have access to any projects, or
No projects have been created in your GroundX account yet, or
There might be an issue with the GroundX API or connectivity.

Solution:

Verify you have correctly set up your GroundX account with at least one project.
Check that your API key has proper permissions.
Try refreshing the cache manually after confirming your account setup.

Warning: "GroundX metadata cache population failed. Check logs for details"

This warning appears during server startup if the initial cache population failed.

Solution:

Check the full server logs for more details about the error.
Verify your API key is correctly set in the environment.
Check your internet connection and GroundX API availability.
Try using the cache/refreshMetadataCache tool to manually populate the cache.

Checking Cache Status

You can check the current status of the cache with:

{
  "jsonrpc": "2.0",
  "method": "cache/getCacheStatistics",
  "params": {},
  "id": "stats-req-001"
}

Or list the currently cached resources:

{
  "jsonrpc": "2.0",
  "method": "cache/listCachedResources",
  "params": {},
  "id": "list-req-001"
}

Dependency Management

GXtract uses uv for dependency management. Dependencies are specified in pyproject.toml and locked in uv.lock to ensure reproducible installations.

Working with Dependencies

Installing dependencies: Run uv sync to install all dependencies according to the lockfile.
Adding a new dependency: Add the dependency to pyproject.toml and run uv pip compile pyproject.toml -o uv.lock to update the lockfile.
Updating dependencies: After manually changing versions in pyproject.toml, run uv pip compile pyproject.toml -o uv.lock --upgrade to update the lockfile with newest compatible versions.

The uv.lock File

The uv.lock file is committed to the repository to ensure that everyone working on the project uses exactly the same dependency versions. This prevents "works on my machine" problems and ensures consistent behavior across development environments and CI/CD pipelines.

When making changes to dependencies, always commit both the updated pyproject.toml and the uv.lock file.

Versioning

This project adheres to Semantic Versioning (SemVer 2.0.0).

License

This project is licensed under the GNU General Public License v3.0 - see the LICENSE.md file for details.

GXtract