I have a small fish function that does something similar. It saves output to a file in XDG_CACHE_HOME. I wouldn’t use it for sensitive items like passwords or tokens in the examples, but I do use it for scripts that need to fetch some data from the network.

For example, I have a script for automating the creation of PRs which fetches the available labels for a repo from github and presents them with fzf multi select. I store the labels with a TTL of a week so that I don’t have to fetch them every time and the script compares the file’s age against the desired TTL to invalidate.

I find it useful for augmenting other programs, but I’m not typically using it on the cli directly.