429 TooManyRequests on Product Advertising API 5.0 on first request; key created 2 mo ago; associate tag has sales

Question

I'm receiving a 429 TooManyRequests error on my first request to all Product Advertising API 5.0 endpoints I have tried.

The key I am using was created about two months ago, so this is not a matter of waiting 72 hours for key activation.

The associated Amazon Associate Tag has at least three successfully delivered orders in the past week, so this is also not a matter of lack of sales.

I am at a loss for how to successfully make a request. Any insights or advice would be appreciated! Lastly, I am ot sure this is the right forum in which to ask the question, but I was directed here by the Amazon support team. If there is a better place to ask that you're aware of, please let me know.

re:Post Agent · Answer

The 429 TooManyRequests error you're encountering with the Amazon Product Advertising API 5.0 is typically related to request throttling, which is a mechanism to limit the number of requests made to the API within a certain time frame. This error can occur even on your first request if the API's rate limits have been exceeded.

Here are some potential reasons and solutions for your issue:

1. API Rate Limits: The Product Advertising API has strict rate limits. Even if you're making your first request, it's possible that other requests using the same credentials or from the same IP address have exceeded the limit.

2. Shared Credentials: If you're using shared credentials or working in a shared environment, other users or processes might be consuming your API quota.

3. Implementation Issues: There might be an issue with how your code is implementing the API calls. Ensure you're not inadvertently making multiple requests in quick succession.

4. Exponential Backoff: Implement an exponential backoff strategy in your code. This involves waiting for increasingly longer periods between retries when you encounter this error.

5. Check API Status: Verify if there are any known issues or maintenance periods for the API that might be causing this behavior.

6. Verify Credentials: Double-check that you're using the correct API keys and that they are properly configured in your request.

7. Contact Amazon Support: If the issue persists after trying these solutions, you may need to contact Amazon's support team for further assistance. They can provide more specific information about your account's rate limits and any potential issues.

Regarding the forum for asking such questions, while this platform can be helpful, you might also consider the official Amazon Product Advertising API forums or developer communities for more specialized assistance.

Remember to always adhere to Amazon's terms of service and API usage guidelines when working with their APIs.  
**Sources**  
[Problem with Amazon API | AWS re:Post](https://repost.aws/questions/QUz3WKBBheRMq_AV8LOYCKfQ/problem-with-amazon-api)  
[Error! TooManyRequests | AWS re:Post](https://repost.aws/questions/QUnDxiGkTnSwWvj_5ot6Wwfg/error-toomanyrequests)  
[Why have two keys for the Product Advertising API | AWS re:Post](https://repost.aws/questions/QUlx334yvuTqSufdmjm1wQQA/why-have-two-keys-for-the-product-advertising-api)

429 TooManyRequests on Product Advertising API 5.0 on first request; key created 2 mo ago; associate tag has sales

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