This has been possible for many years, before agents were a thing. They will open the mail and scan the contents into a pdf for you, requires filing a form with the post office. It gets expensive because they nickel and dime you where they can. There are many more services should you wish to send snail mail.
As an aside, this company's services seem incredibly sketchy - they let you have fake residential or commercial addresses so you can pretend to have a US office or other address