DHL allows a limited number of requests per day through something called โrate limiting.โ For example, if Shipup fetches information from DHL every few hours in a day, depending on the limits imposed to the API key in use and the number of DHL packages that are being tracked in a day, we could reach that limit in a very short time thus being unable to provide updates until the next day.
Therefore, whenever a merchant has an average of over 5,000 active DHL packages on any given day, we kindly ask them to get in touch with DHL in order to provide their own API key to us, which we will use exclusively for their own packages.