Hi, You can find our rate limit policy here: Why am I receiving "HTTP 429 - Too many request / throttling" response from API ? We recommend using the "lastModifiedDateTime" & "lastModifiedDateTimeCondition" to see if any inventoryItems has been modified since your last sync, and then storing/updating a dateTime variable every time you are checking for updates. ... View more

Please let us know whether the issue is still being encountered so that we can act accordingly. ... View more