Open-Source Multi-Agent Firewall Intercepts Both HTTP(S) and WebSocket LLM Traffic

arXiv·medium signal

This paper (arXiv 2607.08282, July 9) proposes a user-facing privacy firewall for LLM interactions, combining a browser extension with a proxy to achieve total traffic interception across both HTTP(S) and WebSocket channels — the WebSocket coverage matters because streaming chat interfaces bypass conventional HTTP-only inspection. A multi-agent pipeline sits at the core, classifying and redacting sensitive data before it reaches the model provider. It is released open-source, making it one of the few immediately deployable artifacts in this week's security batch.