Welcome to the Developer Portal

PayButton Integration
- Integration
- Summary Screen
- 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
- 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
- Connection Keep-Alive
- Testing
- Going Live

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

Merchant Setup

Welcome to the Developer Portal

Our payment gateway processes payments so that you can focus on what you do best!

This developer portal guides you through a complete integration of the payment gateway into your point-of-sale (POS) system, from the first test transaction to going live.

PayButton

Integrate payment into your iOS and Android POS apps.

Windows Integration

Add payment to Windows-based POS systems with PayServer and PayClient.

Backend Integration

Refund transactions, send receipts, and receive automated webhook messages from your backend.

Card Readers

Order a developer kit to test payments with a real card reader and test card.