Login to your status page at instatus.com/login then choose your status page.
Click on the subscribers tab, then Webhook.
Click Add webhook subscriber,
A new form will appear where you can enter:
We will send a requests to your URL using this format and an email will be sent to the specified email address when there is an issue with the URL.
You can give a name to your webhook subscriber by clicking on it and typing a name in the form, you could also delete this subscriber by clicking Unsubscribe.