Is there an offical roblox web api? If no, Any unoffical API recommendations for getting info about a group listed below in a quote if yes, can I do the following stuff in the quote
For example: 1. Member Numbers of different rank 2. Someone's Rank querying with username (direct / indirect) 3. The current Shout 4. The current Shouter 5. Past Shouts 6. Shouter of Past Shouts 7. Total member number
Levi998234 has been working on a documentation on the official web API. It is incomplete, but it is useful. It can be found here.
You could use HttpService
to get that data, but I stumbled upon this page that lists all the ROBLOX Web APIs. Hopefully this'll help you!