These APIs include calls to three entity types:

Anomaly detection rules - The set of conditions to trigger alerts
Anomalies - Actual anomalies found in the data
Alerts - Alert instances that were sent to report on anomalies in the data, according to the detection rules

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The commonParams header is relevant for resellers.
It allows setting rules, or getting anomlies and alerts for customer data. As a reseller, set it to --header 'commonParams: {"isPpApplied":true} to control/view customer data