Anubis - Weighs the soul of incoming HTTP requests using proof-of-work to stop AI crawlers
Anubis - Weighs the soul of incoming HTTP requests using proof-of-work to stop AI crawlers

Weighs the soul of incoming HTTP requests using proof-of-work to stop AI crawlers - TecharoHQ/anubis

I just started using this myself, seems pretty great so far!
Clearly doesn't stop all AI crawlers, but a significantly large chunk of them.