Does anyone know a third party roblox api?

i want an api that will also return if the group is available to join, i don't know where to look. I want to use a third party one because as i found out it is not possible to use the ROBLOX api inside a game

Here is a link to a devforum post wich has all the known API's.. I think the most suitable for you is groups.roblox.com/docs

I can't use roblox api in games, so i want a third party one. like https://rblx.trade/docs/#/. i dont use https://rblx.trade/docs/#/ because it dont have the endpoint i want