Get Started

Get Started

V Start linking NHN KCP payment service quickly.

1API Integration Preparations

site_cd issued by NHN KCP is required for API integration.


"site_cd" : "T0000"

The above data example is the test code and test key value provided by default.
For the issuance of the production environment site code, please issue it after receiving it through a new application on the website.

When applying to an production website, be sure to check the site code and site key received by the linked email.

2Payment Window Configuration

SSL/TLS versions lower than TLS 1.2 are not supported due to security requirement.
Please check whether the HTTP client environment of the merchant server supports TLS1.2


 PC Version OS : Windows & Mac
 PC Version Browser : Firefox (Ver. 27.0 ~), Chrome (Ver. 30.0 ~), Safari(Ver. 7.0 ~), Opera (Ver. 60.0~)
 Mobile Version OS : Android( Ver. 5.0(Lollipop) ~), IOS(Ver. 9.0 ~)
 Mobile Version Browser : Smartphone default browser

3Firewall Information

The following domains and ports must be whitelisted with inbound/outbound with merchant firewall setting.
Please check whether the HTTP client environment of the merchant server supports TLS 1.2

HTTPS Payment page


Product : spl.kcp.co.kr:443
Stage : stg-spl.kcp.co.kr:443

Registering Mobile Transaction


Product : smpay.kcp.co.kr:443
Stage : testsmpay.kcp.co.kr:443

4NHN KCP Server Certificate

For API approval processing, server authentication using NHN KCP issued certificate is required.
Please refer to the Server Certificate Menu for the authenticate procedure.

5Checklist

When the payment module is called from the iframe in the merchant order page, it may not work properly in Chrome browser and IE due to the browser security policy.

When launching the service after development, Test Environment must be set to Production Environment. We are not responsible for any loss caused by not changing from Test Environment to Production Environment.

KCP does not provide solution to interlink KCP response data to merchant database.
(Managing the database processing is the sole responsibility of the Merchants, only the data on payment response for interlinking databases is provided)

Content