key

The names of the metadata types that you can use to filter and group your results. For example, AZ returns a list of Availability Zones.

Not all dimensions are supported in each API. Refer to the documentation for each specific API to see what is supported.

LINK_ACCOUNT_NAME and SERVICE_CODE can only be used in CostCategoryRule.

ANOMALY_TOTAL_IMPACT_ABSOLUTE and ANOMALY_TOTAL_IMPACT_PERCENTAGE can only be used in AnomalySubscriptions.