Buyers pay with their PayPal account. PayPal shows its own button at checkout.
Sign in to your PayPal business account at paypal.com, or open one.
In PayPal, open Account settings → Business information and copy the PayPal Merchant ID.
In the PortOne console, open 결제 연동 → 연동 관리 → 채널 관리. Switch the mode to 실연동, pick 페이팔 and its payment module, and click 다음. Name the channel, enter the PayPal Merchant ID, choose 과세구분, and save.
The channel shows in the list with its channel key, starting with channel-key-. Copy it.
In your project, open Payments → Connect → More payment methods. Paste the channel key into PayPal channel and click Connect.
PayPal doesn’t allow a payment when both the seller’s and the buyer’s PayPal accounts are Korean. PayPal is for buyers abroad.
Some PayPal payments, and some refunds, wait for PayPal’s approval before they complete. Set the webhook from the main guide so their final status reaches DontCode.
That is how PayPal works: it shows its own button on your checkout instead of a window.
With a PayPal test channel, pay from a PayPal sandbox buyer account whose country is not Korea, such as the US.