If you've come across jmp.princeton.edu, you're probably wondering whether it's safe to trust. The short answer: it's a legitimate Princeton University subdomain with a long web history and no safety flags, but it's not transparent about who runs it. That's the trade-off here.
This site has been online for at least nine years, uses modern security protections, and has never appeared on any blacklists. Those are good signs. But there's no way to contact the people behind it, no about page explaining what the site is for, and the live homepage was behind bot protection when I checked. An archive snapshot gave a glimpse, but not much.
For a university resource, the lack of contact information is unusual but not necessarily a sign of a scam. It just means you should manage your expectations. If you need reliable support or want to verify the information you find there, you'll have to look elsewhere or reach out to Princeton's central IT team. Is jmp.princeton.edu a scam? Almost certainly not. But is it a site you should rely on for critical decisions without backup? I wouldn't.
Most legitimate educational projects at least list a lab, a professor, or an email. This one doesn't, and that's worth noting before you take what you see at face value.