Download the ApexonPay PrestaShop module from our developer portal
wget https://api.apexonpay.com/modules/prestashop/latest.zip
Upload the module to your PrestaShop modules directory
unzip latest.zip -d /path/to/prestashop/modules/
Install the module through PrestaShop admin panel
Admin Panel → Modules → Upload a module → Select apexonpay.zip
Configure your API keys and payment settings
Admin Panel → Payment → ApexonPay → Configuration