//token.cloudimg.io/v7/original_image_url?operations&filters
By default, images from any origin domains can be resized by Cloudimage and the storage and traffic consumption generated by the images will count toward your plan's allowance. In the Cloudimage admin console, you can restrict the list of origin URLs that your token can transform images from.
Step 1 - configures domain whitelist in the Cloudimage admin console
Log in to your Cloudimage admin console and navigate to Image settings / scroll down to Whitelisted domains: Configure your original image domains / S3 buckets.
Please note that when you whitelist eg. sample.li, this will also whitelist all its subdomains sub1.sample.li, www.sample.li, etc.
Step 2 - Try it out!
This Cloudimage URL works:
//doc.cloudimg.io/v7/http://sample.li/boat.jpg?width=500
This one does not:
//doc.cloudimg.io/v7/pbs.twimg.com/profile_images/839721704163155970/LI_TRk1z_400x400.jpg?w=500