What address / ip does roblox use to make HTTP requests?

I am making a little thing with google translate API but I can’t put my own code on the server and the only thing I have is limiting by ip / web address.
I tried putting in .roblox.com/ but that doesn’t work.
And I don’t want non-roblox to use my API key.

Why you can’t put your own code in the server ? I think this is the best solution. Also i think the web request is send with the ip of the current roblox server when the game is running but i am not sure

Because I’m just renting an API. Not a server. Which means that I can use their functions and not really my own code on there.

Make a web server that ask a code and make a request to the api for returning it to you after

(I know is possibly but personally i can’t do it)

You can use https://www.whoismyisp.org/ip/
e.g.
https://www.whoismyisp.org/ip/209.206.41.73