Network Merchant’s e-commerce payment gateway enables companies to process online transactions in real-time anywhere in the world. NMI (Network Merchants Inc.) Payment Gateway is a WordPress Plugin that allows the WooCommerce plugin to accept credit card payments without worrying about the Customers Credit Cards Details which are taken care of by the NMI. ooking for a Payment Gateway and can’t find one in our portfolio or if we haven’t integrated it for your shopping cart just contact us through the form on Profile Page so we can work out the payment gateway integration that you’re looking for.