I’m fairly sure HttpService isn’t able to send requests to Roblox sites, so not entirely sure that you would be able to utilize it within Roblox scripts. It would most likely give you a trust check failed error.
It seems, every website that is NOT ROBLOX seems to work fine, however when I tried calling HttpService on a ROBLOX URL, I got an error thrown at me.
Anybody else had this issue, I’ll make an edit at some point in the next few days to demonstrate this better, but it’s pretty easy to replicate.
The HttpService is not allowed to request ROBLOX sites. You can, however, supply that form of link directly to the Image property of an instance to see it displayed (assuming you are trying to display images).
If you wish you utilize the roblox api from ingame you will have to use some intermediate proxy. I don’t remember why we aren’t allowed to request the site, but I do remember the Trust Check serving this purpose - to prevent requests to roblox from ingame.