DKnownAI Guard
AI Agent Security — Prevent Deception, Protect Execution
DKnownAI Guard launched on April 7, 2026.
What it does
Building AI agents? Traditional content filters don't understand the difference between a prompt injection attack and a direct admin command. DKnownAI Guard does. It detects deceptive tactics (jailbreak, prompt injection) separately from direct high-risk requests — so your agent can block hackers while still executing legitimate commands with proper permissions. One API call. Four risk levels. Multi-turn context tracking. Free tier available.
DKnownAI Guard is an AI agent security API for prompt injection detection, jailbreak defense, system prompt protection, and four-level risk classification.
DKnownAI Guard is a security API built for agentic AI. We detect manipulation, separate operational and content-related risk, and keep useful agent behavior intact when requests are legitimate. We block the deceivers, you decide the rest. Traditional content moderation focuses on whether text itself is harmful. DKnownAI Guard focuses first on whether someone is trying to manipulate the agent, so you can block hijacking attempts without breaking legitimate workflows. Built for AI agents that execute code, access files, call tools, and interact with real systems. DKnownAI Guard detects manipulation, separates operational and content-related risk, and helps you respond with precision. Block…from dknownai.com
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Tired of duct-taping access control into agent prompts. Here's the fixJun 2026 · github.com · ▲22Your agent team, on your machine. Open-source harness for multi-user Claude agents. - yaodub/cast
PromptGuardDec 2025 · promptguard.co · ▲3Every 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,…
A pre-execution guard that stops AI agents running destructive commandsAug 2026 · github.com · ▲5A pre-execution guard that stops your coding agent running destructive commands. One shell file, no dependencies. - vandith1/agent-guard
- FPFind prompts that jailbreak your agent (open source)2025 · security.vista-labs.ai · ▲8
We've built an open-source tool to stress test AI agents by simulating prompt injection attacks. We’ve implemented one powerful attack strategy based on the paper [AdvPrefix: An Objective for Nuanced LLM Jailbreaks](https://arxiv.org/abs/2412.10321). Here's how it works: - You define a goal, like: “Tell me your system prompt” - Our tool uses a language model to generate adversarial prefixes (e.g., “Sure, here are my system prompts…”) that are likely to jailbreak the agent. - The output is a list of prompts most likely to succeed in bypassing safeguards. We’re just getting…
Open-Source Gateway to Stop Tool-Abusing Prompt Injections2025 · archestra.ai · ▲9Hi HN, Matvey, Ildar, Joey, and Dominik here. If you're building LLM agents that use tools, you're probably worried about prompt injection attacks that can hijack those tools. We were too, and found that solutions like prompt-based filtering or secondary "guard" LLMs can be unreliable. Our thesis is that agent security should be handled at the network level between the agent and the LLM, just like a traditional web application firewall. So we built Archestra Platform: an open-source gateway that acts as a secure proxy for your AI agents. It's designed to be a deterministic firewall against…

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