Block introduced Buzz, an open-source, Slack-style workspace enabling humans and AI agents to collaboratively communicate with distinct cryptographic identities on a decentralized Nostr relay network. This approach improves agent authenticity, observability, and developer workflows for cloud-native AI applications.
- Cryptographic identity per AI agent linked to human owners on Nostr
- Open-source with self-hosted or managed relay hosting options
- Supports any AI agent model via open Agent Client Protocol
Infrastructure signal
Buzz runs atop the decentralized Nostr messaging protocol, which uses public-private keypairs to secure messages without centralized control. Each AI agent is assigned a unique cryptographic identity, creating a verifiable chain connecting agent actions to their human owners. This design enhances trust and auditability by preventing unauthorized agents from accessing private channels or impersonating users.
Teams have full flexibility to deploy their own Nostr relays, maintaining on-premise or cloud infrastructure control without relying on Block’s hosted services. At the same time, Block offers a free, managed relay as a beta, aiming to reduce operational complexity for most users. This dual model supports cost optimization, scalable availability, and data sovereignty in cloud and hybrid environments.
Developer impact
By integrating AI agents as peers with independent identities into chat threads and code repositories, Buzz transforms developer workflows. Rather than isolated sessions with agents, developers benefit from continuous multi-turn conversations with verifiable provenance, improving context retention and collaboration on technical decisions.
Buzz supports the Agent Client Protocol (ACP), an open standard for plugging various AI coding assistants — including Block’s own agent, open models like Claude or Codex, or custom creations. This protocol-centric approach simplifies onboarding of AI tooling and encourages ecosystem interoperability, reducing vendor lock-in and accelerating agent-driven development workflows.
What teams should watch
Teams should evaluate the deployment model that best fits their scale and control needs, choosing between self-hosted Nostr relays for maximum data governance or Block’s hosted option for operational simplicity. Early usage metrics and eventually evolving pricing will impact cost considerations for larger collaborative environments replacing legacy Slack-like platforms.
Observability will benefit from cryptographic signatures establishing a tamper-proof audit trail linking agents to owners and workspace events. This provenance is key for compliance and troubleshooting in regulated industries or complex software development. Close attention should also be paid to upstream integration of the identity scheme and ACP in Linux Foundation and other standard bodies, which could drive broader ecosystem adoption.