Kindly help me at sfdcpiyush@gmail.com

Hi,
I want to display links just like shown in below(If we click on view, the student's marks sheet need to be displayed in another window)



More Info:
 I am doing Integration, The school children Marks sheets are stored in a different database, 
I have received a URL for Integration.
I have placed them in Remote site settings.
What's next?
How do I receive that JSON file/Response?
Do I need to write any apex classes? Or can I just keep the URL in formula field?