FireClaw – Open-source proxy defending AI agents from prompt injection
Isolated LLM with no tools or memory makes prompt injection hit a dead end.

One-line SDK swap + PR red-teaming with A-F grades—but 'detect-and-block' gateway category is well-funded.
AI/ML engineers and DevOps teams protecting production LLM applications from injection attacks
Robust Intelligence · Patronus AI · Lakera Guard
PromptGuard is a proxy: change your base URL (one line with our SDK, or a few lines without), and every request gets checked for prompt injection, PII leaks, jailbreaks, and abuse. 20+ threat vectors, 39+ PII types. We also ship a red team suite and an autonomous agent that mutates attacks to find bypasses - you get a grade (A-F) and a GitHub Action that runs these tests on every PR. So you see where you're weak before you ship.
Works with OpenAI, Anthropic, Google, Azure, Gemini and more. Policy-as-Code. 10K free requests/month - link in the post.
Happy to answer questions.
Isolated LLM with no tools or memory makes prompt injection hit a dead end.
Heuristic-based shields beat LLM-in-the-loop detectors on speed, but Lakera Guard already owns this space.
Another AI security wrapper in a crowded market, but agent-side integration is interesting.
Bidirectional scanning catches response-side attacks when 28 other MCP tools only check requests.
Transparent proxy blocks agent leaks to LLM APIs without touching agent code.
Static scanner catches prompt injections in code before runtime, unlike runtime guards.