---
url: >-
  https://acquirer-api-docs-v4-en.pingpongx.com/en/notes/technicalterm/clientId/index.md
description: >-
  clientId is the unique identifier for PingPong merchants in PingPongCheckout.
  After completing PingPong merchant registration, you can obtain this ID by
  logging into the merchant backend and accessing the account center, which is
  used to identify and manage merchant information.
---
## Meaning of clientId
PingPong merchant number, the unique identifier for merchants in PingPongCheckout

## How to obtain clientId?
You can only obtain it after completing PingPong merchant registration. You can refer to the <a href="/en/notes/appendix/register/" target="_blank">registration process</a>.
Merchants who have already registered can directly log in to the <a href="https://checkout.pingpongx.com/aq/login" target="_blank">merchant backend</a>, click on "Account Center" in the upper right corner to obtain it, as shown in the figure below:

<v4-iImage src = "/register/clientId.png" name = "clientId acquisition"></v4-iImage>