Intermittent 503 Errors on Multiple Endpoints

[lliuql]

I'm experiencing intermittent HTTP 503 errors when calling several endpoints. The affected endpoints include:

getReport
createReport
getOrders
getProduct
doDownReportFile
getOutbound
(and possibly others)
The error is returned as an HTML response similar to the one below:
`

<title>Website Temporarily Unavailable</title>

 

` The error occurs sporadically and then resolves itself without any intervention. There are no clear indications of what might be triggering these errors.

Questions/Request for Help:

Is there any known issue or maintenance that might be causing these intermittent 503 errors?
Are there any specific recommendations for troubleshooting or mitigating this issue from the API side?
Could this be related to rate limiting, load balancing, or other backend infrastructure concerns?
Any guidance or suggestions to help diagnose and resolve these intermittent 503 responses would be greatly appreciated.

Thank you!

[weilinggu]

Hi @lliuql

Are you encountering 503 calling Selling Partner API? You can monitor the SP-API healthdashboard for large scale issues. It does not seem that there has been large scale 503 errors recently.

You can also open a support case following the guidance here to troubleshoot the issues you are encountering.

Thanks
Weiling
Amazon Selling Partner Services

[lliuql]

Hi @weilinggu,

Thank you for your response.

I have checked the SP-API Health Dashboard, and everything appears to be normal. However, I would like to understand if exceeding API rate limits could be a potential cause of these intermittent 503 errors. Specifically:

1. Could hitting API rate limits intermittently trigger 503 errors instead of a structured error response?
2. Besides rate limiting, are there any other recommended troubleshooting steps to diagnose and mitigate these 503 errors?

Looking forward to your insights. Thank you!