Get Started

Use this guide to take your first steps with KCP Alternative Payments. If you are not sure whether KCP is the right connection for your integration, see the KCP Alternative Payments Overview.

Get Started Using the REST API

KCP transactions are submitted through the same payments API you use for standard authorizations — there is no separate SDK or endpoint base to install. You need a account enabled for KCP processing before your requests route through the KCP connection.

Prerequisites

Before making API requests, ensure the following:

• Your account is enabled for KCP Alternative Payments processing. Contact your representative to enable this connection.
• You have API authentication credentials. See the steps below if you have not yet registered.
• If you plan to offer escrow or wake the customer's app on a mobile device after payment, contact your customer service representative to enable and update your app URL.

Steps

1. Create your account and register for API credentials: if you do not already have a account, create one, then register and obtain authentication credentials for the REST or Simple Order API.

   See Getting Started with the REST API for account creation, registration, and credential setup.

2. Review the supported payment methods: KCP accepts KakaoPay, Naver Pay, Payco, credit card payment, mobile billing payment, and real-time bank transfer. See Payment Methods in the Overview.

3. Send a test sale: submit an initiate sale request to the test server to confirm your integration reaches KCP successfully. See Sales for the required fields and an example.

4. Simulate check status and refund responses: use test trigger values to become familiar with the possible response messages before you process production transactions. See Status Check Test Information and Refund Test Information.

5. Explore the other transaction types: once your test sale succeeds, see Endpoints for the full list of Sale, Status Check, and Refund operations KCP supports.