As seen in https://github.com/pielco11/fav-up, it is possible to get a servers real IP using the hash of a fav-icon.
Perhaps it would be possible to implement something like this using the current API.
Sounds like an interesting idea, but CloudFlair's goal is to implement a specific Cloudflare bypass method, so I would rather leave other tools like fav-up do the work.
As seen in https://github.com/pielco11/fav-up, it is possible to get a servers real IP using the hash of a fav-icon. Perhaps it would be possible to implement something like this using the current API.