Welcome to the Developer Portal

Default UI Integration
- Integrating Default UI
- Migrating from PayButton to Default UI
- Managing Default UI Properties
- Summary Screen
- Incremental Authorization
- Custom Receipt Printing
- Automatic Receipt Printing
- Standalone Receipt Printing
- Sending Receipts via Email
- Customization
- Mobile UI Customization
- Release Notes

PayButton Integration
- Integration
- Summary Screen
- On-Reader Tipping
- Loyalty and Bonus Cards
- Pre-Auth and Capture
- Refunds
- Custom Receipts
- Testing
- Going Live
- Release Notes

Windows Integration
- Configure, Run, and Test PayServer
- .NET POS Integration via PayClient
  - Refunds
  - Custom Receipts
  - Preformatted Receipts
  - On-Reader Tipping
  - Pre-Auth and Capture
- POS Integration via PayProtocol
  - Usage and Message Flows
  - Message Specification
  - Refunds
  - Custom Receipts
  - Preformatted Receipts
- Testing
- Going Live
- Release Notes

Custom Integration
- Installation
- Integration
- Signature
- Refunds
- Email & Print Receipts
- Custom Receipts
- Custom Receipts for PAX Terminals
- Preformatted Receipts
- On-Reader Tipping
- Loyalty & Bonus Cards
- Pre-Auth & Capture
- Connection Keep-Alive
- Testing
- Going Live

Backend Integration
- API Endpoints and Authentication
- WebHooks
- Query Transactions
- Refunds
- Custom Receipts
- Going Live
- API Documentation

Merchant Setup
- AMEX Merchant Setup
- Elavon Merchant Setup
- Nexi Merchant Setup

Publish your Android App for PAX

To start the Android application process, complete the following form. The information you provide will be used to create and submit your Android application to PAXSTORE.

The APK must be signed.

The maximum size of the APK is 100MB.

Please make sure to sign your application correctly. The suggested method is to use a local Keystore and let Android Studio sign the APK. All the APK versions of the same App should be signed with the same developer signature.

When releasing a new APK, it must have an incremental version number.

* Required