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Payment API Introduction

The EasyPay Simple Payment API provides two types of integration: APIs that process payments through a PG (Payment Gateway) and APIs that process payments through a VAN (Value Added Network).

PG Payment Flow​

This service is designed for affiliates who process online non-face-to-face payments through a PG.
By using the EasyPay PG service, you can offer interest-free installments, credit card points, and integrated settlement services.
The following diagram illustrates the payment flow where approval requests are sent directly to the PG.

When a customer completes authentication in the window, they are redirected to the merchant's returnUrl along with an Authentication Transaction Number.
The merchant then uses this number to request payment approval from EasyPay PG.
Once the approval is complete, you can verify the final payment details from the response.

VAN Payment Flow​

Based on the existing VAN Terminal ID (TID), the service is divided into online (non-face-to-face) and offline (face-to-face) payment flows as shown below.

In the Online VAN service, when a customer completes authentication, they are redirected to the affiliate's returnUrl with an Authentication Transaction Number.
The affiliate then requests payment approval from KICC VAN using this number.
Once approved, the final payment result can be verified in the response.