I’ve made a collection of type definitions for the roblox web apis using the OpenAPI definitions of each of them. This is useful because it lets you use the roblox api with intellisense without having to painfully type out the types yourself.
Simply find the type definition file inside of the types directory and copy-and-paste the source inside of your codebase.
Example:
local users = require(...)
local raw = HttpService:GetAsync("https://users.roblox.com/v1/users/1")
local user: users.GetUserResponse = HttpService:JSONDecode(raw)
print(user.id)
print(user.foo) -- luau gets angry
Enjoy!