Terminal3 Payments Opencart plug-in is easy to install and fully customizable. With a single integration, all products of your E-commerce business will be monetized with 150+ payment options localized in 75+ currencies and more than 200 countries.

This tutorial assumes that you have a Terminal3 Payments account. Please Sign up if you don’t have one.

Download plug-in

Terminal3 Payments plug-in for Opencart can be downloaded here.

Project configuration in Terminal3 Payments system

  • Login to Terminal3 Payments system with your account.

  • Go to My Projects tab. You will see your new project already created. Project Key and Secret Key will be needed later to finish the project setup on Opencart admin panel.

Remember to save changes at the bottom of Settings section.

  • You can also enable Brick as a payment gateway by clicking the grey brick icon on your project overview. It will generate Brick Test Keys and Brick Live Keys right next to your Widget Keys.

  • In Widgets section, create a widget that you prefer. And save changes. You will see Widget code after widget creation, which will also be needed later on Opencart admin panel.

Setup Terminal3 Payments module on your platform

  • Download the plugin archive and extract it in Opencart folder (download modules for Opencart 1.5, OpenCart 2.2 and OpenCart 3.x on Github).

  • Login to your admin area, go to Extensions -> Payments, browse all available payment methods.

  • In Paymentwall tab, click Edit to configure your module settings.

    • Fill all the required fields and change Active status to Enabled.

The Project Key and Secret Key can be found under your Opencart project overview’s Widget Keys in My Projects tab. If you are using Brick, Public Key and Private Key are under Brick Test Keys and Brick Live Keys. Widget code is available in your Widgets section of your project.


  • Terminal3 Payments provides supports for Opencart versions 1.5 to 3.x.

  • List of available Payment Methods can be discovered here.

Contact if you find the version of your Opencart module is not supported.

Next step

You can start to test payments of your projects.

Refer to test payments with test method

Once you make sure everything works smoothly, please submit your project to go live.

See how to live your project