Block built a Slack for AI agents — and gave each one its own passport

Block launched Buzz, a free open-source collaboration workspace built on Nostr for humans and AI agents.

Each agent gets its own cryptographic keypair tied to a human owner, making agents first-class workspace members.

Buzz supports multiple agent tools and models, and teams can use either self-hosted or Block-hosted Nostr relays.

Public signups are open, positioning Buzz as a Slack-like alternative with decentralized identity and infrastructure.