Can I send data from a page to a form via post method?

Lets say in one page on the add to cart button, I post the details such as price and quantity, and the button opens up a jotform.

Can I, using the posted values, pre-fill some of the form ?

Hope im clear enough

Hello,

You are able to prepopulate form fields via form URL as you can see in the following guide: https://www.jotform.com/help/71-Prepopulating-Fields-to-Your-JotForm-via-URL-Parameters 

Please check this guide and if you need further clarification, do not hesitate to contact us.

Thank you.