Merchant API Reference

Merchant API v2

Each endpoint page now uses the same split view: the v2 contract is on the left, and the runnable test console is on the right. The console accepts raw JSON, can use your merchant private key to generate the RSA-MD5 signature through the local proxy, and shows backend-oriented code examples plus the live response.

Docs from v2 specRaw JSON test consolePrivate key signingLive response + snippets

Available endpoints

• Checkout API
• Transaction Query
• Server-to-Server Card API
• Card iFrame API
• Refund API
• Refund Query
• Signature Tool

How to use the console

1. Open the endpoint page you want.
2. Review the contract on the left.
3. Paste or edit the raw JSON request in the console.
4. Provide your merchant private key if you want the console to sign automatically through the local proxy.
5. Send the request and inspect the response, signed payload, and generated code examples.

The source of truth remains the v2 specification files under GPay_API_Specification_v2. The old v1 integration skill was used only as reference for integration patterns, not for the v2 contract.