Webhook payload unable to deliver

I created a webhook through docerhub API and I am able to see the hook in the UI. However when I push an image, the webhook UI page just shows “failure” in the “View History” pane. I did not receive any request at all in my server however. When I do a normal get/post from the browser i am able to receive the request on my server so i know that the server is working. How do I debug this ? There seems to be no logs whatsoever about the response webhook received.