These documents explain how to use the alternative payment methods: online bank transfers, cash payments, e-wallet payments, invoicing, and PayPal Express Checkout.
Alipay Domestic Services Using the Simple Order API
API Guide
Alipay International Services Using the Simple Order API
API Guide
Korean Cyber Payments (KCP) Services Using the Simple Order API
API Guide
Affirm Services Using the Simple Order API
API Guide
Klarna Services Using the Simple Order API
API Guide