Forensic Summary

Loopsy is an open-source tool enabling cross-machine communication between AI coding agents (Claude Code, Cursor, Codex) and mobile devices via a self-hosted Cloudflare Workers relay. While designed for legitimate developer productivity, the architecture introduces significant attack surface: a relay brokering shell access and AI agent commands across machines is a high-value target for interception, hijacking, or supply chain compromise. Security teams should assess exposure before deploying such tools in sensitive development environments.

Read the full technical deep-dive on Grid the Grey: https://gridthegrey.com/posts/cross-machine-ai-agent-relay-tool-expands-attack-surface-for-developer/