Integration of POST API with Form data as input to the api and saving the api output and form data in a table

So, I am taking the user inputs in the form and that data acts as an input to Model api.

Btw thanks for the detailed explaination for combined data. I'll try this out.

Absolutely correct. I am feeding the user input through form to Model API(POST Request)

Yep, and that's the problem
You can't do both
Since the ModelAPI needs the form data, when the button is clicked to "Submit" the form, that should call the ModelAPI and do NOT clear the form.
In the ModelAPI call, use an Event Handler in Success section and add the query AddRecord
When Add record succeeds (Event Handler Success), then you can clear the form

this is what I am trying to do

Thanks Man. I'll try this