I am getting the following result with a AddItemRequest to the API Sandbox: 2015-10-09T07:39:02.212Z Failure The requested data is currently not available. The requested data is currently not available due to an eBay system error. Please try again later. 16100 Error SystemError 931 E931_UNI_API5_17617533_R1 The same call has been working in the past. Are you aware of a problem on server side?