What’s something that’s unclear or confusing to you about Farcaster? 

No dumb questions!

are all the apis required to build client packed into hubs or there is a different api service?

building degencast.wtf /degencast . ex-bitmain, binance

I see. so clients using official fc apis do not have to build this transformation service. but You would need it if building your own api from scratch ?

All of the data is there. But to build a typical feed app you’d need to do some additional transformation of the data with a database.