Invoke Payment Window
This step invokes the payment window to proceed with authentication for each payment method.
Upon completion, the authentication result is sent to the returnUrl provided during transaction registration via the POST method.
Important Precautions
- Mobile iFrame: When integrating on mobile, using an iFrame may cause errors with certain financial institutions, preventing payment completion.
- Kakao Pay (Web): When paying via Kakao Pay in a web browser, the customer must manually return to the merchant's page after completing authentication in the KakaoTalk app to receive the response normally. This behavior may differ from other card issuers' methods on Android.
- Naver Pay: When paying via Naver Pay, the screen will transition only after the Approval API process is fully completed.
Request
Open the authPageUrl obtained from the Transaction Registration API in a browser (GET).
Request URL
GET {Payment Window URL}
Content-type: text/html
Response (POST to returnUrl)
Parameters
| Field Name | Type | Length | Required | Description |
|---|---|---|---|---|
| resCd | String | 4Byte | ✅ | Result Code (Normal: “0000”) |
| resMsg | String | 1000Byte | ✅ | Result Message |
| shopOrderNo | String | 40Byte | Merchant Order Number (Returns the value sent in registration) | |
| certControlNo | String | 40Byte | Auth Sequence Number (Required for Approval Request) |