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) allow our IP addresses, and (2) enable the API endpoint to allow our calls.
Allow our IP addresses
Please allow the IP addresses listed here: GoDataFeed server IP addresses
Use this article Cloudflare "Configuring IP Access Rules": https://support.cloudflare.com/hc/en-us/articles/217074967-Configuring-IP-Access-Rules
Enable the API endpoint to allow our calls
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 try to import your catalog into GoDataFeed again.