I use Cloudinary in conjunction with Fastly. Cloudinary derives transformed images on the fly, and stores them. Fastly then picks those images up. Each image has a unique url based on the original url, with appended transformation parameters.
I would like to be able to make an api call which will purge an image and all content that shares a url prefix with that image. It seems to me that either surrogate keys defined by the original image, or wildcard purges would be the best way to do that.
In the documentation, both of those services need manual attention in the Fastly UI. Can this be done with API calls?