PAX SI SDK | North Developer


ProductsPAX Semi-Integrated SDK
semi-integrated
Combine your POS app running on a PC with a PAX terminal to start accepting in-person payments. Build a completely custom app that integrates seamlessly with PAX hardware and firmware thanks to the PAX SI SDK. You create the checkout experience and we’ll handle the payments via EMV-certified software running on any PAX terminal listed on the Hardware page.

Integration Guide
Server Functions

Flexible Integration Options

Accept payments at your retail store, restaurant, and more. All you need is a device running your POS app and a compatible PAX terminal.


Any Payment Type
Accept various payment types including VISA, Mastercard, American Express, Discover, JCB, and Diners Club credit cards.
Any Payment Method
Accept credit, debit and EBT cards (keyed, swiped, tapped, or dipped), cash, and mobile wallets.
PCI Compliant
Easily achieve PCI compliance by letting us handle the sensitive payment information, such as credit card numbers and card information, so it never enters your server environment.
EMV Pre-Certified
This payment system utilizes EMV pre-certified software. Your application communicates with the pre-certified software, which collects transaction and card data and passes it to North, keeping it out of your server environment.
Tokenized Transactions
Custom tokens allow you to link to transactions for voids, refunds, tip adjustments, and more. They help mitigate the risk and expense involved with storing sensitive card data.
1/5

Developer Support
We provide full support for PAX equipment and any transactions processed through it.
Easy Integration
Start accepting in-person payments anywhere with an Internet connection by connecting a payment terminal to a device running your POS app.

Overview
Environment Language PCI Functions
Card-Present

POS app +
any PAX terminal listed on the Hardware page Any POS-side language, JSON Reduced PCI scope for the integrator. The payment service provider is responsible for meeting most PCI requirements. Auth & Capture, Auth Only, Capture Only, Void, Refund, Tip Adjust, Batch Close

Server Functions
Incremental Authorization, BRIC Refund, BRIC Sale

Environment	Language	PCI	Functions
Card-Present POS app + any PAX terminal listed on the Hardware page	Any POS-side language, JSON	Reduced PCI scope for the integrator. The payment service provider is responsible for meeting most PCI requirements.	Auth & Capture, Auth Only, Capture Only, Void, Refund, Tip Adjust, Batch Close Server Functions Incremental Authorization, BRIC Refund, BRIC Sale

Coding Tutorial


PAX Tutorial for C#
Fork the GitHub repository and follow step-by-step instructions to add Semi-Integrated (SI) in-person credit card payments to a C# / .NET POS app using the PAX SDK. This tutorial is for a reduced PCI scope solution, meaning that the payment provider is responsible for meeting most PCI requirements.


Server FunctionsAdditional functions can be called from your server, including Voids, Refunds, Tip Adjust, and Batch Settlement. Browse the Server Functions specification for more information.