can someone please tell me how to make a Http request inside of Godot with C#?

Welcome to the forums @PoisnFang!

I think you can use the HTTPRequest node to make HTTP requests with C#, you just need to call the Request function and pass the URL. Then you can parse the results, as explained on this page on the documentation (uses GDScript, but the functions should be similar for C#).

2 years later