Thank you for taking the time to contact us today.
I apologize for any inconvenience you’ve experienced as a result of our recent change to Product Advertising API availability. In order to participate in this part of the program, your account would need to be completely accepted into the program. To be fully approved, you would need to use our other Product Linking tools on Associates Central to refer three qualifying sales. Once you have, we will conduct a manual review of your website within one week. If approved, you would have immediate access to Product Advertising API.
This is the only way of accessing Product Advertising API at this time. If your website requires the use of PA-API, you would need to contact them directly to see what other options would be available, or use our other Product Linking tools on a different website or social media site.
Thank you for your patience and understanding. I hope this information helps.
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Best regards,
Amazon.com
It appears that you have lost access to the Product Advertising API per the Efficiency Guideline rules.
You have not referred any qualifying sales orders through this account in approximately three years.
Effective 23-Jan-2019, the request limit for each account is calculated based on revenue performance attributed to calls to the Product Advertising API (PA API) during the last 30 days.
Each account used for Product Advertising API is allowed an initial usage limit of 8640 requests per day (TPD) subject to a maximum of 1 request per second (TPS). Your account will receive an additional 1 TPD for every 5 cents or 1 TPS (up to a maximum of 10) for every $4320 of shipped item revenue generated via the use of Product Advertising API for shipments in the last 30 days.
Note that your account will lose access to Product Advertising API if it has not generated referring sales using PA API in the last 30 days.
I hope this better explains why you are receiving the throttling messages. Have a good weekend.
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