This is great, my only problem is usps forces you to print the whole page so it wastes half a page of label paper.
Is there a way you could do the same thing for paypal.
https://www.paypal.com/us/cgi-bin/webscr?cmd=_ship-now
Check that url, you have you have to be logged in to fill it but paypal allows you to only print the label part.

Can it be done?