AntonioCiolino/kroger-mcp

🛒 Kroger MCP Server 🛍️ -- FastMCP for Kroger Shopping

A FastMCP server that provides AI assistants like Claude with seamless access to Kroger's grocery shopping functionality through the Model Context Protocol (MCP). This server enables AI assistants to find stores, search products, manage shopping carts, and access Kroger's comprehensive grocery data via the kroger-api python library.

📺 Demo

Using Claude with this MCP server to search for stores, find products, and add items to your cart:

https://github.com/user-attachments/assets/69055f5f-04f5-4ec1-96ac-330aa288fbd1

Changelog

A changelog with recent changes is .

🚀 Quick Start

Prerequisites

You will need Kroger API credentials (free from Kroger Developer Portal). Visit the Kroger Developer Portal to:

1. Create a developer account
2. Register your application
3. Get your CLIENT_ID, CLIENT_SECRET, and set your REDIRECT_URI

The first time you run a tool requiring user authentication, you'll be prompted to authorize your app through your web browser. You're granting permission to your own registered app, not to any third party.

Installation

Option 1: Using uvx with Claude Desktop (Recommended)

Once published to PyPI, you can use uvx to run the package directly without cloning the repository:

Edit Claude Desktop's configuration file:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json

Linux: ~/.config/Claude/claude_desktop_config.json

Windows: %APPDATA%/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "kroger": {
      "command": "uvx",
      "args": [
        "kroger-mcp"
      ],
      "env": {
        "KROGER_CLIENT_ID": "your_client_id",
        "KROGER_CLIENT_SECRET": "your_client_secret", 
        "KROGER_REDIRECT_URI": "http://localhost:8000/callback",
        "KROGER_USER_ZIP_CODE": "10001"
      }
    }
  }
}

Benefits of this method:

• Automatically installs the package from PyPI if needed
• Creates an isolated environment for running the server
• Makes it easy to stay updated with the latest version
• Doesn't require maintaining a local repository clone

Option 2: Using uv with a Local Clone

First, clone locally:

git clone https://github.com/CupOfOwls/kroger-mcp

Then, edit Claude Desktop's configuration file:

{
  "mcpServers": {
    "kroger": {
      "command": "uv",
      "args": [
        "--directory",
        "/path/to/cloned/kroger-mcp",
        "run",
        "kroger-mcp"
      ],
      "env": {
        "KROGER_CLIENT_ID": "your_client_id",
        "KROGER_CLIENT_SECRET": "your_client_secret", 
        "KROGER_REDIRECT_URI": "http://localhost:8000/callback",
        "KROGER_USER_ZIP_CODE": "10001"
      }
    }
  }
}

Option 3: Installing From PyPI

# Install with uv (recommended)
uv pip install kroger-mcp

# Or install with pip
pip install kroger-mcp

Option 4: Installing From Source

# Clone the repository
git clone https://github.com/CupOfOwls/kroger-mcp
cd kroger-mcp

# Install with uv (recommended)
uv sync

# Or install with pip
pip install -e .

Configuration

Create a .env file in your project root or pass in env values via the JSON config:

# Required: Your Kroger API credentials
KROGER_CLIENT_ID=your_client_id_here
KROGER_CLIENT_SECRET=your_client_secret_here
KROGER_REDIRECT_URI=http://localhost:8000/callback

# Optional: Default zip code for location searches
KROGER_USER_ZIP_CODE=90274

Running the Server

# With uv (recommended)
uv run kroger-mcp

# With uvx (directly from PyPI without installation)
uvx kroger-mcp

# Or with Python directly
python server.py

# With FastMCP CLI for development
fastmcp dev server.py --with-editable .

🚀 Development & Local Testing

For local development and testing, this project includes convenient startup scripts:

MCP Server

Start the MCP server for use with Claude Desktop or other MCP clients:

./start_mcp_server.sh

This script will:

• Activate the virtual environment
• Install dependencies if needed
• Start the MCP server on stdio

Web Interface

Start the Flask web application for browser-based testing:

./start_web_app.sh

This script will:

• Activate the virtual environment
• Install dependencies if needed
• Start the web app at http://localhost:5000

The web interface provides a user-friendly way to test all Kroger MCP functionality including store search, product search, cart management, and authentication.

🛠️ Features

💬 Built-In MCP Prompts

• Shopping Path: Find optimal path through store for a grocery list
• Pharmacy Check: Check if pharmacy at preferred location is open
• Store Selection: Help user set their preferred Kroger store
• Recipe Shopping: Find recipes and add ingredients to cart

📚 Available Tools

Location Tools

Product Tools

Cart Tools

Information Tools

Profile Tools

Utility Tools

🧰 Local-Only Cart Tracking

Since the Kroger API doesn't provide cart viewing functionality, this server maintains local tracking:

Local Cart Storage

• File: kroger_cart.json
• Contents: Current cart items with timestamps
• Automatic: Created and updated automatically

Order History

• File: kroger_order_history.json
• Contents: Historical orders with placement timestamps
• Usage: Move completed carts to history with mark_order_placed

🚧 Kroger API Limitations

• Partner Access: With Partner API access, both remove_from_cart and clear_cart can modify the actual Kroger cart
• Local-Only Alternatives: Use remove_from_local_cart_tracking and clear_local_cart_tracking when you've manually modified your cart in the Kroger app/website
• Recommended: Use remove_from_cart and clear_cart (modify both Kroger cart and local tracking) for full synchronization

Note: Rate limits are enforced per endpoint, not per operation. You can distribute calls across operations using the same endpoint as needed.

🏫 Basic Workflow

1. Set up a preferred location:

   User: "Find Kroger stores near 90274"
   Assistant: [Uses search_locations tool]
   User: "Set the first one as my preferred location"
   Assistant: [Uses set_preferred_location tool]
   

2. Search and add products:

   User: "Add milk to my cart"
   Assistant: [Uses search_products, then add_items_to_cart]
   
   User: "Add bread, eggs, and cheese to my cart"
   Assistant: [Uses search_products for each, then bulk_add_to_cart]
   

3. Manage cart and orders:

   User: "What's in my cart?"
   Assistant: [Uses view_current_cart tool to see local memory]
   
   User: "I placed the order on the Kroger website"
   Assistant: [Uses mark_order_placed tool, moving current cart to the order history]
   

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request. For major changes, please open an issue first to discuss what you would like to change.

📄 License

This project is licensed under the MIT License - see the file for details.

⚠️ Disclaimer

This is an unofficial MCP server for the Kroger Public API. It is not affiliated with, endorsed by, or sponsored by Kroger.

For questions about the Kroger API, visit the Kroger Developer Portal or read the kroger-api package documentation.