I was wondering if it was possible to use HTTPService to rank someone in a group, but entirely within Roblox without using Glitch or another external solution, perhaps by using the Roblox API. Is this possible ?
It’s possible only if you make use of a proxy, as Roblox doesn’t let you access their services using HTTPService.
RoProxy does not allow too i dont see any proxy that can be used to achieve this.