[sasvari]

It would be easy enough to create a simple script that could copy it to your clipboard and then clear the clipboard after a time delay.

pass [0] (see comment above [1]) claims to do that:

  show [ --clip, -c ] pass-name
       Decrypt and print a password named pass-name. If --clip or -c is specified,
       do not print the password but instead copy the first line to the clipboard
       using xclip(1) and then restore the clip‐board after 45 (or
       PASSWORD_STORE_CLIP_TIME) seconds.

[0] http://www.passwordstore.org/

[1] https://news.ycombinator.com/item?id=10190719

[RobBollons]

Clipboard integration probably isn't something i would look to add to passbox myself, but if someone can find a way to get it to work nicely cross platform and submit a PR then i would likely merge it.