I have some JSON files on my sites that I use for various things, among them generating links on my links page of sites I like. Rather than edit them directly and recompile my Hugo generated static site, I use a shortcut to pull the JSON files for the link categories I want to edit into Data Jar and edit them there.
Yes, I could use Jayson to edit them directly using Shellfish and Files app to get to the JSON files, but I also want to update my site git repository and recompile the site, and I have the TestFlight beta of Data Jar and I like its Shortcuts support, so I do it this way.
(Also posted about here)