Setup Notification webhooks

How to setup Notification webhooks

To send notifications from CAST AI Console to a external system, select the organization you want to configure the webhook.

  1. Click on the Notifications Icon -> View All

  2. Click on Webhooks

  3. Click on Add webhooks

  4. Create the Webhook

NameThe name of the Webhook configuration
Callback UrlThe callback URL to send the requests to
Severity TriggersThe severity levels that will trigger that notification
TemplateThe template of the request that will be sent to the callback URL

The Request Template should be a valid JSON. We provide a better overview on how to customize the payloads in the next section [Request Template Configuration](#Request Template Configuration).

Request Template Configuration

We allow users to fully customize the request sent to external systems, in that way we can support almost any application out there. The Request Template is the payload sent within the webhook call, the following variables from notifications are avaialable:

NotificationIDThe UUID of the notification, it is unique{{ .NotificationID }}
OrganizationIDOrganization that owns the notification{{ .OrganizationID }}
SeverityIndicates the severity of the impact to the affected system.{{ .Severity }}
NameName of the notification{{ .Name }}
MessageA high-level, text summary message of the event.{{ .Message}}
DetailsFree-form details from the event, can be parsed to JSON{{ toJSON .Details }}
TimestampWhen the Notification was created by CAST AI{{ toISO8601 .Timestamp }}
ClusterCluster information, might be empty if the notification ins't cluster specific{{ toJSON .Cluster }}
Cluster.IDThe unique identifier of the cluster on CAST AI{{ .Cluster.ID }}
Cluster.NameName of the cluster on CAST AI{{ .Cluster.Name }}
Cluster.ProviderTypeCloud provider of the cluster (eks, gke, aks, kops){{ .Cluster.ProviderType }}
Cluster.ProjectNamespaceIDCluster location where cloud provider organizes resources, eg.: GCP project ID, AWS account ID.{{ .Cluster.ProjectNamespaceID }}

As you can see the variables are in go template style, and you can mix them anywhere you want in your Request Template.

Example of Request Template Slack

To send a notification on slack we need a simple JSON request with payload in the body,

    "text": "CAST AI - {{ .Name }}",
    "blocks": [
      "type": "section",
      "text": {
       "type": "mrkdwn",
       "text": "{{ .Cluster.Name }}<br> {{ .Message}}"

How to create the webhook url isn't in the scope of this how to, you can find information following the link

Example of Request Template PageDuty

Page duty accepts Alerts in the endpoint The content is a simple JSON request with the payload in the body. You can find bellow an example of request template with the available variables:

    "payload": {
        "summary": "{{ .Message }}",
        "timestamp": "{{ toISO8601 .Timestamp }}",
        "severity": "critical",
        "source": "CAST AI",
        "component": "{{ .Cluster.Name}}-{{ .Cluster.ProviderType}}-{{ .Cluster.ProjectNamespaceID }}",
        "group": "{{ .Name }}",
        "class": "kubernetes",
        "custom_details": {
            "details": "{{ toJSON .Details }}"
    "routing_key": "--routing_key--",
    "dedup_key": "{{ .NotificationID }}",
    "event_action": "trigger",
    "client": "CAST AI",
    "client_url": "{{ .Cluster.ID}}?org={{ .OrganizationID }}",

Note that as dedup_key it was set the NotificationID, this field is unique in CAST AI, and will ensure you won't produce an alert with the same content more than once.

How to create the routing_key isn't in the scope of this how to, you can find more information at