I need to fetch json data from an external api call and I need to populate my form's initial values from the values received in the json

I need to fetch json data from an external api call and I need to populate my form's initial values from the values received in the json.

So my fetch/api call via http needs to made before the form loads up and I need some way to populate the form fields with some of the values that are returned.

How would I do that?

Also is it possible for us to call a jotform form with parameters in which we initialize the form values?

It is possible to prepopulate the fields using URL parameters. By this method, you can prepopulate the fields coming from an API. You can check out this user guide on :

Prepopulating Fields to Your JotForm via URL Parameters

Let us know if you need further assistance.