I have been trying to access my Roblox inventory from Roblox Studio to use the data for a plugin I am working on but I had figured out that you are not allowed to access the Roblox Web API from Roblox Studio using the HttpService (https://inventory.roblox.com/docs#/)
During my research, I came across two terms which are 'proxy server' and 'localhost' but I am unsure what they mean. Thinking about it, since I intend on using the Roblox Web API solely in Roblox Studio I think that 'localhost' is what I am looking for but I am confused.
How will I access my Roblox inventory from Roblox Studio?
Localhost is not what you Need. Localhost reffers to your local IP adress (127.0.0.1).
What you Need is a Proxy Server. What's that, you are asking.
Because you can't acces the API directly you have to take the detour.
You are sending the request to a web Server, the Proxy Server, the Proxy Server sends the request to the Roblox API. You can use a public Proxy like http://rprxy.xyz/ or host your own on your own Server with this. https://github.com/sentanos/rprxy