btw it's open source

https://github.com/Slokh/anoncast

Does this require a server? Is there a way to build it without a server, by making the farcaster account itself a smart contract that accepts a zk proof as its signature scheme?

@sealcaster had a cli tool https://github.com/BigWhaleLabs/sealcaster-cli

fully open source, zk-driven, server-less

alas, zk thing kind of died off and we pivoted with no traction

anonymous warpcasts from warpcasters powered by zk 🦭 cast at sealcaster.xyz 🤝 utilizing sealc.red