Support for full text rss

I’d like to be able to set a proxy, a service, that enables to view articles fully.
One way would be to prefix to the feed’s URL something like… but that is not always suitable for loading all articles from the original feed source.
Instead it would be more effective to load fully an article via that service, once it is listed in the program from its original source.

Any solution is fine, just to enable one to have full article without leaving the program, very suitable also for filtering purposes.

I’m afraid it’s not possible to do it with Listary.