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Hello rajiv. If you're referring to capturing information from facebook, it's possible by using JotForm's Fit Forms. You can do this by editing your form from the form builder > click Integrations > on the Other tab, click Fit Forms. Then continue with the wizard.
What this will do is require the user to login to his facebook account before being able to fill up the form. Then your form will get the basic information from facebook and have it in the form submission.
There is also an API that uses JotForm with LinkedIn. You can get to know more about the LinkedIn and JotForm integration from this link.
JotForm Support Manager
I'll answer your question, on this thread