Built a tool that stops AI agents from being hijacked by malicious content in webpages and emails
Summary
Arc Gate is a proxy that protects AI agents from prompt injection attacks by treating web and email content as untrusted, requiring no code changes from developers.
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Your AI agent is one poisoned webpage away from doing something catastrophic
Arc Gate is a proxy-level tool that enforces instruction-authority boundaries to prevent AI agents from being hijacked by poisoned web pages, emails, or retrieved documents.
I built a proxy that prevents AI agents from taking actions based on hidden instructions. Here are the numbers.
Arc Gate is a proxy that blocks prompt injection attacks by treating all external content as non-instructional, achieving high detection rates (99-100%) with low false positives across multiple benchmarks.
If your AI agent can send emails, browse websites, or call tools, I want to test something with you
Arc Gate is a security tool for AI agents that tracks entire conversations to detect adversarial behavioral drift across multiple turns, unlike traditional per-message checks. The author seeks teams with real agent workflows to test it.
Most AI security tools inspect messages. Arc Gate inspects sessions.
Arc Gate is an AI security tool that focuses on inspecting entire sessions rather than individual messages, offering a distinct approach to security monitoring.
I built an OpenAI compatible firewall for AI agents. Try to break it.
Arc Gate is an OpenAI-compatible firewall that tracks authority across entire AI agent sessions, escalating from allow to block before tool calls execute. It is available as a live demo and open-source on GitHub.