If you want to be notified from Customerly about your users or leads actions webhooks are the best way to achieve this goal
When you receive a new lead you can be notified using this webhook
Receive a webhook notification when a contact unsubscribe
Receive a new webhook when a user has been tagged
When a tag has been removed from a user this is the webhook payload you are going to receive
If you want to receive a webhook notification when a user sign up this is the payload you are going to receive