Save the contents of the clipboard to a variable

Here's how to get the clipboard contents.

On some platforms, clipboard operations are available from the platform scripting system.

var text = app.doScript("the clipboard as text",ScriptLanguage.APPLESCRIPT_LANGUAGE);

On other platforms, search recommends to use the HTMLFile object.

https://stackoverflow.com/questions/19696308/how-can-i-use-clipboard-in-vbscript

Create TextFrame, paste clipboard, read contents - do what you need.