In many cases you would prefer to use your own domain when receiving the webhooks. To do that, you will need to:
Create a CNAME record in your domain pointing at
hooks.webhookrelay.com. Instructions on how to do this can be found in your DNS provider's documentation.
Reserve your domain in Webhook Relay dashboard.
Go to your bucket details, then click on your input and select your reserved domain:
On your first HTTP request to this domain, Webhook Relay will retrieve HTTPS certificate.