Deckard: Open Source Scanner for Rogue AI Agents

Arthur Launches Deckard, the open source scanner that hunts rogue AI agents

Today Arthur is releasing Deckard, the industry’s first open source scanner to detect rogue AI agents. Deckard runs routine scans across your endpoints, cloud providers, and managed agent platforms to keep an always-current inventory of every agent running in your organization. That data flows straight into your SIEM, so your security analysts can spot rogue agents and act quickly.

Most approaches to agent discovery look in one place and miss the rest. Deckard scans from several directions at once to close those blind spots:

1. Endpoints. Deckard ships with a comprehensive set of signatures for osquery, the leading endpoint scanner used by security teams everywhere. Our agent software factory continuously validates and improves these signatures. You can deploy them through popular fleet and device management platforms like Fleet and Jamf.‍
2. Network & Gateway. Deckard analyzes network logs to detect agents calling LLMs and other agentic resources.‍
3. SIEM. Deckard connects to your SIEM and searches your existing logs for signs of agent activity, using data you already collect.‍
4. Cloud. Deckard integrates with leading cloud providers, including products from AWS Bedrock to Gemini Enterprise.‍
5. Managed agent environments. Deckard supports managed agent platforms such as the OpenAI Agents API and Claude Managed Agents, so new agents are found and tracked as soon as they come online.

Every day there are new stories of rogue agents exploiting misconfigured systems and loose security controls. They access data they shouldn’t, keep copies of it, and connect to systems they aren’t authorized to use. The damage already runs into the millions of dollars and it’s growing as fast as AI adoption.

At most organizations, AI innovation is a mandate. The answer isn’t to slow down. It’s a security posture that lets your teams move fast while keeping risk in check. Arthur makes it easy to embrace AI the right way; Deckard is where that starts, because you can’t secure agents you can’t see.

Scan your organization now: https://github.com/arthur-ai/deckard

Below is a video of our CTO walking you through launching Deckard and what it looks like in action. Happy agent hunting!