Currently alert notification configuration allows webhook targets with a secret configuration. This limits us in terms of which webhooks could be configured. There are multiple webhooks which do not support secret configuration rather support Headers to be passed with authentication details. This request is to support additional set of header to be passed/added in the webhook configuration for alert notification. For example, during alert notification configuration I should be allow to configure additional set of headers like Authorization: "Basic cdge....==" and Source: "Atlas"; with Webhook URL configuration which is further used by target to first authorise POST call made by Atlas during alert trigger and then Source tag could be utilized to route to various queue based on Source value. This feature is required for proper utilization of configured alerts being triggered. Let me know in case there is any additional information required to make this functionality available.