Amazon Marketplace Web Service (MWS) will no longer be available after March 31, 2024. All MWS developers must migrate to Selling Partner API (SP-API) to avoid service disruptions. Refer to the Migration Hub for more information.
This section shows some common Amazon MWS error code examples and possible solutions to the error.
Reason
This 503 error indicates that the Amazon MWS service is unavailable. When you use the client library, the response is parsed and a MarketplacewebService exception with all data included is thrown.
How to troubleshoot
Retry the request using an "exponential backoff" approach, as described in Handling errors: Service errors.
POST mws.amazonservices.com /Reports/2009-01-01 ?AWSAccessKeyId=AKIAJSTDR2444BJQ &AWSAccountId=458080 &MWSAuthToken=amzn.mws.4ea38b7b-f563-7709-4bae-87aeaEXAMPLE &Marketplace=ATVPDKIKX0DER &SellerId=AC28N11YUQ &SignatureVersion=2 &Version=2009-01-01 &RequestId=2d093e-0408-4517-9685- 474d1a0a8e9e &CustomerId=A2AR6RWNQ &NamespaceUri= http%3A%2F%2Fmws.amazonservices.com %2Fdoc%2F2009-01-01%2F &ServiceName=MarketplaceWebService &Action=GetReportList &ErrorCode=ServiceUnavailable &ErrorFault=Receiver HTTP/0.0" 503 296 "-" "UST/1.0 (Language=PHP/5.2.14; MWSClientVersion=2009-07-02; Platform=Linux infong 2.4 #1 SMP Wed Nov 4 21:12:12 UTC 2009 i686 GNU/Linux/Linux infong 2.4 #1 SMP Wed Nov 4 21:12:12 UTC 2009 i686 GNU/Linux/Linux infong 2.4 #1 SMP Wed Nov 4 21:12:12 UTC 2009 i686 GNU/Linux)
Reason
This 503 error indicates that your request is being throttled. When you use the client library, the response is parsed and a MarketplacewebService exception with all data included is thrown.
How to troubleshoot
Check the throttling limit in the API documentation for the type of request you are submitting. Set up your retry logic to resend the request when the appropriate amount of time has passed to prevent throttling.
POST mws.amazonservices.com /Reports/2009-01-01 ?AWSAccessKeyId=AKIVUUNIIMFTA &AWSAccountId=7948 &MWSAuthToken=amzn.mws.4ea38b7b-f563-7709-4bae-87aeaEXAMPLE &Marketplace=ATVPDKIKX0DER &SellerId=ASH1H4EF &SignatureVersion=2 &Version=2009-01-01 &RequestId=260-0116-41fa-91d0-7bc98359c694 &CustomerId=ASH14EF &NamespaceUri= http%3A%2F%2Fmws.amazonservices.com %2Fdoc%2F2009-01-01%2F &ServiceName=MarketplaceWebService &Action=GetReportRequestList &ErrorCode=RequestThrottled &ErrorFault=Sender HTTP/0.0" 503 309 "-" "null"