I have created test application using cybersource type and with that I got api key as well as secret key, created new spring boot project as sample application and integrated those keys with it. While I am trying to test payment checkout getting error code 403.
Please check attached image.
Awaiting for your reply
Please correct payload with provided sample data and share merchant ID to validate from Cybersource and added in the system.
Please provide ex-correlation ID to further investigate.