The "top error codes" document is really useful for SDK users when building out a full implementation of using the CallRetry object available in the SDKs. See these Knowledge Base articles for more information on using the CallRetry object: .NET SDK: https://ebaydts.com/eBayKBDetails?KBid=470 Java SDK: https://ebaydts.com/eBayKBDetails?KBid=474