How to connect the form with Ajax post request

There is a third party backend database, while the form is send, the post information will send to backend then the backend will send back a pdf to customer's email box.

Normally, I will add the Jquery ajax (api) code fetch back the data in code editor. How can I do if I use Jotform?

What if I use Jotform plugin in wordpress?

Thanks a lot!

Have you checked the suggestion provided by my colleague in the ticket that you logged yesterday: https://www.jotform.com/answers/2429649-How-to-connect-the-form-to-my-backend-database 

If you use JotForm plugin in Wordpress you can add the form to Wordpress as explained here: https://www.jotform.com/help/174-Embed-JotForm-in-Wordpress-using-the-Embed-Form-Plugin