Amazon Ad Server imposes quotas and limits on API requests to control the number of API calls during a given period. These quotas and limits ensure an equitable distribution of the system resources and protect the system from receiving more data than it can handle.

Quotas are set for each user by product group. The first layer is a quota limitation per day, the second layer is a throttling mechanism based on the limitation of calls per second.

The first layer quota limitation is a subject to change, whether the throttling values are constant global setup.