Can i send sql queries to database using http? (rest api)

Hey, I'm trying to create a custom chatgpt which should take data from supabase.

I want it to perform complex queries and advanced analysis.

But chatgpt can only send http requests.

So how to setup so that supabase can receive sql queries through http (rest api) .

Also, please let me know if supabase allows creating custom endpoints for restful API (crud)
If yes, how to do that.

Thanks