Merchants who want to display payment methods to users and accept payments on their own checkout page can integrate HaiPay using a pure API (Direct API) approach.

For Direct API interfaces, merchants must have PCI-DSS certification if they handle card number information themselves.

1. Collection Process

2. Payment Process

3. API Parameters

For details, please refer to: API Description

4. End-to-End Testing

For details, please refer to: End-to-End Testing