How to trace CreateVolume-Gp2 API call in Cost Explorer?

Question

I am confused if EBS volumes are really created. This API call is showing as a daily expenses and is costing significantly according to AWS Cost Explorer. Is there a way to trace who made the call?

Answer 1

I tried AWS CloudTrail but this call does not show. It does show in Other Reports as AWS Usage Report in Billing > AWS Cost and Usage Reports.

CreateVolume-Gp2 is a confusing cost tagging in Cost Explorer if you group by API operation. If you switch to Usage Type, it is tagged as <some region>-EBS:VolumeUsage.gp2. I confirmed it somehow equals to the $x per GB-month of provisioned storage cost.