How do I link the Mollie payment system to OpenCart?

Mollie facilitates accepting payment methods such as iDEAL, PayPal and credit card in your OpenCart webshop. For this purpose, we have developed a module (plugin) that can be seamlessly integrated into any OpenCart installation.

Please take note: FTP access to your web server is required for the installation of this module. Never done this before? Then let your website builder or server administrator install this module for you.

  1. Download the latest Mollie module for Opencart ( via our GitHub page:
  2. Upload the folders 'admin' and 'catalog' to the OpenCart installation. Overwrite old files if asked to do so.
  3. Go to the OpenCart admin environment. You can find the Mollie module under Extensions & Payments. Activate the module.
  4. Fill out the API key. You will find this key in your Mollie account under 'Developers'.

If you want to make some test payments first, use the test key instead of the live key.