Was the request just for the pasting of clipboard into another app? I could be wrong since MS has changed this over time.
Windows (XP and maybe older?) used to include a minimalistic clipboard viewer app, was \Windows\CLIPBRD.EXE
Now you can get a viewer with more functionality elsewhere, for example:
Windows Clipboard Viewer lists the available formats for any data that is currently stored on the clipboard. It automatically updates the information displayed as the contents of the clipboard change.
freeclipboardviewer.com