OpenCart - FlexPay Extension
Official OpenCart extension that adds FlexPay connectivity, including Verotel, CardBilling, and FreenomPay support.
WooCommerce - FlexPay Plugin
WordPress plugin for WooCommerce that enables Verotel, CardBilling, Bill, GayCharge, and BitsafePay payment flows.
Implementation note
Before going live, verify your Merchant ID, Shop ID, Signature Key, and postback URL settings in the Control Center to ensure order status updates are received correctly.
For advanced recurring billing, combine the plugin setup with your Control Center API access and operational monitoring in your merchant backend.