Easiest way to implement payments on my website?

The website I am working on right now is completely static, except for one page that does some serverside work.

What is an easy way to turn that page into a paid service?

Something like this would be perfect:

If Stripe would send the user to "mysite.com/paidservice.php?token=..." after they paid, all I would need to implement in paidservice.php would be the 3 lines of code above.

But I guess nothing as simple as this exists? If not, what is the closest?