RapidSpike supports multiple ways of configuring notifications. One of these it to send a HTTP POST to a WebHook when a configured rule generates a notification.
To add/configure webhooks, click the settings icon in the top right hand corner. Once in the settings dashboard click ‘Integrations’ on the left sidebar.

Here you can enable and configure the Webhook Integration. Where you can add your WebHook URL and a label. As you can add multiple WebHooks, the label allows you to identify each one later on when adding them to your Notification Rules.

Once added, you will now have WebHooks available as a delivery method option for your Alert Delivery Groups.