Amazon product api in php

Question

I have a problem when trying to use Amazon product API. I have all my credentials, but when I send a request I get a 503 Status code with description

You are submitting requests too quickly. Please retry your requests at a slower rate

I have tried a library called apai-io link: https://github.com/Exeu/apai-io .

I have also tried this code: https://www.patchesoft.com/amazon-affiliate-api-php#fullcode .

The weird thing is that I am sending only one request, trying to find a product with a specific ID. I would really be grateful if someone could give me some instructions or more information.

Answer 1

They are rate limiting the requests, see the discussion here

https://forums.aws.amazon.com/forum.jspa?forumID=9

And the policy here is new for the efficiency guidelines

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.

https://docs.aws.amazon.com/AWSECommerceService/latest/DG/TroubleshootingApplications.html#efficiency-guidelines

This has impacted me too and it's counterintuitive imo, you have to sell to use API but cannot use the API if you don't sell.