I added some more options to the CLI, which ended up being a lot more annoying than i expected. Here are the ones I added:

added to zzzclip list:

• -v: verbose mode. Verbose mode also lists the mimetype for a clipboard item.

added to zzzclip get:

• -f: runs in foreground. Here’s something you might not have known: wl-copy starts a background process when you run it. The clipboard contents aren’t owned by the compositor, so a process has to be running to supply the data. I made zzzclip get do the same thing, but like wl-copy I added an option to make it run in the foreground.
• -s: output summary. It’s basically zzzclip list -v but only for one item.
• -l: list stored mime types. It lists the mime types for an item.
• -m : directly prints the data for an item.