Using an API in roblox studio

Does anyone have any good systems to create and use an API inside of roblox? I want to use it for a verification system I just need help on the roblox part as I can do the creating of the api

Use HttpService. This is a built-in service that will allow you to send request, get, and post requests to your api. Note it can only send requests (at least get ones) from the server. More info here: HttpService

Alright, thanks for the help I will look into using this