Yes, the IIT JAM Exam Has the Official Site From there you may get the Information About the IIT JAM Exam this Year IIT JAM Exam is Conducted by the IIT Delhi the Details of the IIT JAM Exam is As Follow

the Web Address of the Official Site of the IIT Jam is jam.iitd.ac.in

The top Menus of the IIT JAM Official Site is

Home
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At the Right of the page you may get the menu of Announcement

At the left of the page you may get the Following Menus

Candidate Portal
Virtual Calculator
Information Brochure
Important Dates
FAQs
Disclaimer
Mid of the page Contains the Information About the IIT JAM

Here I am giving you the Snapshot of the official Site of the IIT JAM

IIT JAM