It's difficult to say exactly why you're having issues with Cybersource without more information, but here are some general troubleshooting steps that may be helpful:
Check that your endpoint URL is correct and that it's publicly accessible. If there's a typo in the URL, or if the server is down, you won't receive any webhook notifications.
Verify that you've correctly configured the webhook in your Cybersource account. Double-check the URL, the event types you want to receive notifications for, and any other settings you may have configured.
Ensure that your server is properly set up to receive and handle webhook notifications. Make sure that the server is listening on the correct port and that the firewall settings allow incoming traffic on that port.
Check the server logs on your endpoint to see if there are any error messages that may be causing the issue. This can help you identify specific problems with your server setup or code.
If you're still having issues, contact Cybersource support for assistance. They may be able to provide additional information or help you troubleshoot the issue.
Remember that webhook issues can be difficult to diagnose, as there are many potential points of failure. It's important to approach troubleshooting in a systematic way and eliminate possible causes one by one.
