Installation

Install the app

1. Open the Shopify App Store

   Search for Transdirect in the Shopify App Store, or use the direct link provided in your Transdirect members area under API Modules.

2. Install the app

   Click Add app and follow the prompts to authorise the Transdirect app on your Shopify store.

3. Connect your Transdirect account

   Enter your Transdirect API key when prompted. If you don’t have an API key yet, follow the quickstart guide to generate one — select Shopify as the module type.

4. Enable carrier-calculated shipping

   Ensure your Shopify store has carrier-calculated shipping enabled. This is included with Shopify Advanced and Shopify Plus plans, or available as an add-on for other plans.

   In your Shopify admin, go to Settings → Shipping and delivery and confirm that third-party calculated rates are active.

Tip

After installation, visit the app settings page within your Shopify admin to configure display modes, default dimensions, and courier preferences.

Set up product dimensions

Accurate product dimensions are essential for correct shipping quotes. Couriers charge based on the greater of actual weight or volumetric weight, so missing or incorrect dimensions can lead to inaccurate pricing.

Per-product dimensions

You can set weight and dimensions on each individual product in your Shopify catalogue:

1. Open a product

   In your Shopify admin, go to Products and select the product you want to update.

2. Enter shipping details

   In the Shipping section of the product page, enter the Weight, Length, Width, and Height.

   Note

   Shopify uses kilograms (kg) for weight and centimetres (cm) for dimensions by default. Make sure your units are consistent across all products.

3. Save the product

   Click Save to update the product. The Transdirect app will use these dimensions when calculating quotes.

Per-variant dimensions

If a product has multiple variants (e.g. different sizes or colours) with different physical dimensions, you can set dimensions per variant:

1. Open the product

   Navigate to the product in your Shopify admin.

2. Edit variant shipping details

   Scroll to the Variants section and click on the variant you want to update. Enter the weight and dimensions for that specific variant.

3. Repeat for each variant

   Update all variants that have different physical dimensions. Variants without custom dimensions will fall back to the product-level dimensions.

Tip

If most of your variants share the same dimensions, set the dimensions at the product level and only override on variants that differ.

Bulk dimension import

For stores with large catalogues, entering dimensions one product at a time is impractical. The Transdirect Shopify app supports bulk importing product dimensions via CSV.

1. Export your product list

   From the Transdirect app settings in your Shopify admin, export your current product list as a CSV file. This gives you a template with all your products and their current dimensions.

2. Fill in dimensions

   Open the CSV file in a spreadsheet application and fill in the Weight, Length, Width, and Height columns for each product.

   Column	Unit	Description
   Weight	kg	Actual weight of the product
   Length	cm	Longest dimension
   Width	cm	Second longest dimension
   Height	cm	Shortest dimension

3. Import the CSV

   Upload the completed CSV file back through the Transdirect app settings page. The app will update all matching products with the new dimensions.

Caution

Products without dimensions will use the default item size configured in your app settings. If no default is set and a product has no dimensions, the quote may be inaccurate or fail.

Upgrading the app

If a new version of the Transdirect Shopify app is available, you can upgrade by reinstalling the app from the Shopify App Store. Your settings and configuration will be preserved.

How to reinstall the app

1. Go to the Shopify App Store and search for Transdirect.
2. Click Add app — Shopify will detect that the app is already installed and offer to update it.
3. Follow the prompts to complete the reinstallation.

Need help upgrading?

If you encounter any issues during the upgrade process, contact the Transdirect support team:

• Email: support@transdirect.com.au
• Phone: 1300 668 229

Next steps

• Configure your app settings — set display modes, default dimensions, and checkout behaviour
• Set up courier preferences — enable, disable, rename, and surcharge couriers
• Create shipping rules — control rates based on postcode, weight, cost, and more