We found that stores using a proxy server to limit traffic reject our API calls to download their product data. Please follow the instructions below to (1) whitelist our IP addresses, and (2) enable the API endpoint to allow our calls.
IP addresses for whitelist
In CloudFlare: navigate to Page Rules > Create Page Rule > Create a Page Rule for [domain]
Page Rules tutorials
Once these tasks have been completed, please click on Import from the Manage > Imports page.