Optional Set-Up Tasks {#wh-fg-optional-intro}
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You can complete optional set-up tasks during or after creating a webhook subscription. These tasks are optional and are not required in order to successfully set-up webhook subscriptions.

* Include a health check URL to enable `Cybersource` to monitor your server's status for reliability.
* Validate the integrity of a webhook notification.
* Set up a retry policy for how to receive notifications when your server URL is initially unresponsive.