Amazon dynamically throttles or suspends Product Advertising API access based on storefront sales performance.
Primary Reasons for Revoked Access
- Daily Call Limits: Daily API calls are calculated based on your referred sales volume over the last 30 days. If your storefront exceeds this daily threshold, calls are paused until the next calendar day.
- Inactivity: If your API keys have not registered a referred sale in the last 30 days, Amazon suspends API access. Access is reinstated automatically once your store records a qualifying sale.
For complete details on rate limitations, read the official Amazon API Rates Documentation.