Kustom Checkout is a revolutionary payment solution for OpenCart 3.x that helps merchants increase conversion rates with a mobile-first, secure, and fully customizable checkout. Whether you are a global enterprise or a small business, Kustom adapts to your needs with flexible payment methods, multi-currency support, and seamless integrations.

Key Features

• Trusted & Seamless Checkout: frictionless and secure payment experience that builds customer trust.
  Multiple Payment Options: accept credit cards, local payment methods, and alternative options.
  Customized Experience: fully customizable checkout flow aligned to your brand identity.
  Global Reach: support for multiple currencies, languages, and shipping integrations.
  Order Management: automatic order status updates (paid, refunded).
  Compatibility: works with all OpenCart themes, including Journal3.
  Security: fully PCI-DSS compliant.
  Sending Shipping Option: Merchants can provide KCO with shipping options to present to the consumer using the shipping_options property. This enables KSA, presenting a shipping selector in the checkout. The cart updates automatically.

Language Module

ITA.
EN
Support Other language

PCI-DSS Security
Kustom Checkout follows the guidelines of PCI DSS (Payment Card Industry Data Security Standard), which protect sensitive cardholder data:

Card data is never stored on the merchant’s server.
All transactions are processed through secure connections (SSL/TLS).
Reduced risk of fraud and unauthorized access.

Installation
Requirements:

OpenCart 3.x
PHP 7.2+
cURL extension enabled
Valid SSL certificate


OCMOD Installation:

Go to Admin → Extensions → Installer.
Upload the file kustom_checkout.ocmod.zip.
Go to Admin → Extensions → Modifications and click Refresh.
Clear the cache.
Configure the module from Extensions → Payments.


Enable KCO Shipping Option add this rules to your .htaccess root shop
# KSS callbacks → OpenCart routes

RewriteRule ^auth$ index.php?route=extension/payment/kustom_ssc/auth [L,QSA]
RewriteRule ^shippingoptions$ index.php?route=extension/payment/kustom_ssc/shippingoptions [L,QSA]
RewriteRule ^shipment$ index.php?route=extension/payment/kustom_ssc/shipment_create [L,QSA]
RewriteRule ^shipment/([^/]+)$ index.php?route=extension/payment/kustom_ssc/shipment_item&shipment_id=$1 [L,QSA]
RewriteRule ^shipment/([^/]+)/confirm$ index.php?route=extension/payment/kustom_ssc/shipment_confirm&shipment_id=$1 [L,QSA]

In the Kustom/Klarna Shipping Assistant panel set:

Base URL = your shop domain (or with the prefix used in the rewrites).

The related endpoints will therefore be:

/auth
/shippingoptions
/shipment
/shipment/{id}
/shipment/{id}/confirm


Selling in Multiple Countries
Kustom Checkout is available in 229 countries, with more than 10 considered core countries, including support for Kustom Credit, local cards, and alternative payment methods.

Core Countries and Supported Currencies
Country Code Currency

Sweden SE SEK
Norway NO NOK
Finland FI EUR
Denmark DK DKK
Great Britain GB GBP
Germany DE EUR
Netherlands NL EUR
Austria AT EUR
Switzerland CH CHF
United States US USD
Spain ES EUR
France FR EUR
Belgium BE EUR
Italy IT EUR

Note: Kustom does not support currency conversion. Orders must be managed in the same currency as configured in the Kustom Order Management API.

⚙️ Integration Recommendations
One URL per market (e.g., merchant.co.uk): set purchase_country = GB.
One URL for multiple markets (e.g., merchant.eu): enable all supported shipping countries and use the country_change callback to update language and currency.

DEMO

username : customer@email.se
password: 123456