# Configure the OpenCart plugin

When you've successfully installed the OpenCart plugin, configure the plugin properly to enable you to perform operations.

## Available configurations

Below you can find a walkthrough of the configuration options of this plugin and a description for each one:

- **Merchant API Key**: Enter the [Sandbox API Secret key](https://sandbox-business.revolut.com/settings/apis?tab=merchant-api) or the [Production API Secret key](https://business.revolut.com/settings/apis?tab=merchant-api).
- **Mode**: Depending on which environment to use the plugin in, set to **Sandbox** or **Live**.
- **Title**: Enter the title displayed on the checkout page.
- **Enable "Authorize Only" mode**:
  - To check the card for validity only but not charge the account until the order is approved, select this check box.
  - To charge the debit/credit card when the order is placed, clear this check box.

- **Total**: The checkout total the order must reach before this payment method becomes active.
- **Geo Zone**: Payment method will be active only for selected zones.
- **Status**: Set to **Enabled** to enable the Revolut Payment Gateway plugin on your OpenCart website.
- **Setup webhook**: Set up the webhook to synchronize your OpenCart orders when an order is completed on Revolut's side.

## Test the plugin in the Sandbox environment

You can make test payments using the plugin in the Sandbox environment.

To do that, complete the following steps:

Complete the fields in the **Settings** section:

- **Enable plugin?**: Set to **Yes**.
- **Mode**: Set to **Sandbox**.
- **API Key (sandbox mode)**: Enter the [Sandbox API Secret key](https://sandbox-business.revolut.com/settings/apis?tab=merchant-api).

For more information about testing the integration, see [Test in the Sandbox environment](/docs/guides/merchant/test-and-go-live/set-up-sandbox).

## Use the plugin in the production environment

When you are ready to start accepting payments in your store using the **Revolut Gateway for OpenCart** plugin, configure the following fields in the **Settings** section:

- **Enable plugin?**: Set to **Yes**.
- **Mode**: Set to **Live**.
- **API Key (live mode)**: Enter the [Production API Secret key](https://business.revolut.com/settings/apis?tab=merchant-api).