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Overview

If your add-on is not showing in the cart, it’s usually due to a product configuration issue in Shopify. This guide covers the most common causes and how to fix them, whether you are using Upcart’s built-in Shipping Protection or a custom product-based add-on. Note: Shipping Protection in Upcart is created as a standard Shopify product, so it follows the same publishing rules and limitations as any other product.

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1. Inventory Settings

Go to: Shopify Admin > Products > [Your Add-on Product]

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Track Quantity

If Track quantity is enabled, your product must have at least one available unit in stock.
  • If inventory is 0, the add-on will not display in the cart.

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Continue Selling When Out of Stock

If you want the add-on to be available at all times:
  1. Enable Continue selling when out of stock in Shopify.
  2. Make sure this option is applied to all variants if your add-on product has more than one.
Learn more in Shopify’s Sell when out of stock documentation.

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2. Product Status

Your add-on product must be set to Active in Shopify to appear in Upcart. To check:
  1. Go to Shopify Admin > Products.
  2. Look at the Status column next to the product name.
  3. Ensure it is marked as Active, not Draft.
If the product is a draft, it will not appear in Upcart.

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3. Online Store Sales Channel

Your add-on product must be published to the Online Store sales channel. To check:
  1. Go to your product’s admin page.
  2. In the Publishing section, look for Online Store.
  3. If it’s missing, click the three dots, then select Manage sales channels.
  4. Enable Online Store and click Save.
Without this setting, Upcart cannot detect or display the add-on in the cart.

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4. Add-on Product Type Limitations

Not all product types are compatible with Upcart add-ons. The following product configurations are not supported:
  • Products with multiple variants
  • Products configured as subscriptions
  • Bundles or dynamically generated products from bundle apps
For best results, use a simple, single-variant product as your add-on.

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Still Not Showing?

If you’ve checked everything above and your add-on still isn’t appearing:

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Clear Browser Cookies

Cookies can sometimes affect how add-ons sync between Shopify and Upcart.
  • Clear your browser cookies for your store and refresh the page.

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Contact Support

If the issue persists, contact the Upcart Support Team via the in-app chat.
When reaching out, include:
  • The product name or link
  • A screenshot of the product’s status and inventory settings
  • Confirmation that it’s published to the Online Store
Our team will help you troubleshoot and confirm if the issue is theme- or configuration-related.

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Learn More

For complete instructions on setting up and styling add-ons, visit the Add-ons Module documentation.