To receive webhook events, you must add a webhook endpoint to your Rewardful account. You can add, edit, or remove endpoints from the Webhooks page in your Rewardful dashboard.
And endpoint is simply a URL on your application that Rewardful will send data to when an event occurs.
An example endpoint:
Your webhook endpoints must be served over HTTP/SSL.
Your endpoint must be capable of receiving and processing JSON data sent from Rewardful's servers.