We have added an additional feature, which would allow users to control the number of API calls made to the Magento servers through a new setting in the Magento instance (Settings > Plugins > Magento) and the setting field's label is "Maximum write API calls per second." 

Setting the value of this field to an integer would restrict the Magento instance to making that specific number of API write calls per second and since it would really depend on how much Magento can handle, as it can be set up differently, for optimal results you can set it initially to 20 and start testing and monitoring the processes in case the number of calls needs to be reduced. Leaving the field blank will leave Magento API write calls unthrottled, as they were before this setting was introduced, while the API read calls are unaffected.