Ping is a lightweight endpoint used to confirm that an API credential is valid.

A successful call confirms the request reached the server and the token was accepted. The response reports the request is authenticated and which merchant it resolves to.

The Ping endpoint supports a single health check call. A response with a merchantId confirms the API key is valid and requests can proceed. A missing or null merchantId means the API key, client ID, or client secret should be checked.

• GET /pay-int-api/ping. Confirms the request is authenticated and returns the merchant it resolves to.