Farcaster

Any free APIs for farcaster I could play with? Or do I need my own hub?

There's plenty . You can start with warpcast's api -

I’m a builder looking for the next challenge. 

Blockchain data analyst. Interested in data science and blockchain.

Analysis-
 https://paragraph.xyz/@yesyes,

https://dune.com/yesyes

There's plenty . You can start with warpcast's api - https://warpcast.notion.site/Warpcast-v2-API-Documentation-c19a9494383a4ce0bd28db6d44d99ea8

easiest way to build on farcaster @ neynar.com | /neynar

@neynar is not free but happy to chat and see if something can work for you. Offers more Farcaster data than other APIs, including Warpcast's own :)