Ai-Firewall

What it does

AI Firewall is a security layer built for developers and startups using LLMs. It detects and blocks prompt injection attacks, redacts personal information (PII), and filters malicious jailbreak prompts before they reach your model. Built with Node.js, Express, and OpenAI GPT-4o-mini, it helps ensure your AI apps stay safe, compliant, and attack-resilient. 🔗 Live Demo 🎥 Demo Video 💻 GitHub Repo

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  OP here. I built this because I recently caught myself almost pasting a block of logs containing AWS keys into Claude. The Problem: I need the reasoning capabilities of cloud models (GPT/Claude/Gemini), but I can't trust myself not to accidentally leak PII or secrets. The Solution: A Chrome extension that acts as a local middleware. It intercepts the prompt and runs a local BERT model (via a Python FastAPI backend) to scrub names, emails, and keys before the request leaves the browser. A few notes up front (to set expectations clearly): Everything runs 100% locally. Regex detection…

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  PromptGuardDec 2025 · promptguard.co · ▲3

  Every other gateway is detect-and-block. You don't get a security grade. You don't get red team in CI. We built the one that does. 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,…

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