Direct Connect API & SDKs

NMI Direct Connect is a solution for processing credit and debit card transactions from terminal to card issuer. It is built on the NMI gateway and as a result can handle contact and contactless EMV transactions, magnetic stripe, and keyed card details for several different transaction types such authorizations and refunds.

This document describes in detail how to get started with using the NMI Direct Connect framework including:

The Registration Process
The Testing Framework
The Web Front End
The Transaction Types
The Software Development Kits
The Communication Protocol (with examples)

The following Software Development Kits are available:

Java 8+
.NET 5.1.0
.NET 5.3.0

Contact your account manager or submit a request for access to the Direct Connect integration guide and software development kits.