About the Additional Service Plugin

As an additional fees calculation provider, you can integrate with Wix to allow merchants to request and use your services on their Wix sites. The additional fees you calculate are then included on the site's cart and checkout pages.

The integration is done via an app in the Wix App Market and by implementing the Additional Fees service plugin. After the app is installed on a site, Wix triggers a call to your service whenever the site needs to calculate additional fees for a transaction.

Using the service plugin, you can design your app to calculate various additional fees for the merchant's customers, including:

  • Fragile packaging fees
  • Shipping insurance fees
  • Item warranty fees
  • Gift wrapping fees
  • Carbon offset fees

Get started

Follow these steps to begin implementing your service plugin.

Choose a framework

You can implement this service plugin with the following framework:

Configure your service plugin

To configure and customize your plugin, you need to provide important information in the service plugin configuration file. You can configure your plugin in the Wix Dev Center.

Define handler functions

Use additionalFees.provideHandlers() to define the following handler functions that implement your custom business logic. Make sure you define all required functions.

FunctionRequired
calculateAdditionalFees()Yes

Code examples

Below is an example for implementing the Additional Fees service plugin in your code.

Self-hosted: Basic code structure

This is the basic code structure for implementing a self-hosted Additional Fees service plugin:

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See also

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