NMI Integration Guides

Instructional PDFs and additional resources regarding NMI are listed below.

Integration Portal

Visit the Integration Portal to retrieve API documentation and additional technical details.

Virtual Terminal

The Virtual Terminal is a feature that allows merchants to manually key enter and submit transactions quickly and easily. For additional info please CLICK HERE.


The gateway offers e-invoicing functionality. You can view additional information HERE. This is a separate service in which you must enroll, so contact us with any questions.


The gateway offers QuickBooks compatibility via the SyncPay system. CLICK HERE for more information.

Recurring Billing

The gateway provides a convenient and easy tool for submitting and managing recurring, or subscription-based, transactions. Create subscriptions manually or in your Web checkout form. For additional instructions CLICK HERE.

Shopping Carts

The gateway offers a QuickClick shopping cart service to create simple check out buttons for small web stores. You may find additional information HERE.

Many merchants may already have a shopping cart system in place or wish to use a 3rd party system. For a list of compatible 3rd party shopping carts, click HERE.

Fraud Management

The gateway offers a fraud management utility that e-commerce merchants may wish to take advantage of. iSpyFraud is a rules-based fraud prevention tool to assist merchants with screening suspicious transaction activity. Please CLICK HERE to view a detailed guide, or HERE to review several merchant use-case scenarios.