agentseal
AI Agent Security Scanning and Protection Tool
Install & Use
Copy this prompt and send it to your AI assistant (Claude / Cursor / TRAE / Codex / WorkBuddy etc.) to auto-install:
Help me install this AI Skill: agentseal. It is used for: AI Agent Security Scanning and Protection Tool Full Skill content: https://321skill.com/skills/agentseal/raw/index.md Read that page and install it.
The prompt includes a link to the full Skill content. You can also view the full content.
AgentSeal addresses the security pain points AI Agents face in daily use: malicious skill files, tampered MCP configurations, prompt injection attacks, data exfiltration paths, and more. In practical development, developers often need to install third-party skills and configure MCP servers but lack effective security review methods. AgentSeal provides a comprehensive local detection solution.
Usage is simple: just run pip install agentseal to install, then execute agentseal guard to scan all AI Agent configuration files on the local machine—no API key required. Afterwards, you can use agentseal scan --prompt "..." to test system prompts against attacks, agentseal scan-mcp to audit whether MCP server tool descriptions have been poisoned, or agentseal shield to monitor configuration file changes in real-time and automatically isolate threats.
It is ideal for teams or individuals who need unified security management of multiple AI Agents, especially DevOps and security engineers already deploying various Agents like Claude, Cursor, and VS Code. For Agent developers who need to regularly audit the skill supply chain and defend against prompt injection attacks, it is an essential tool.
It is recommended to run agentseal guard immediately after installing new skills or updating MCP configurations. Note: the scan command relies on an LLM to execute attack tests; the free option uses a local Ollama model, while cloud models require your own API key. The real-time monitoring feature of shield is suitable for CI/CD environments but consumes minimal system resources.
Key Features
Unlike general-purpose security scanners like ClamAV, AgentSeal is specifically designed for the AI Agent ecosystem. It can detect MCP server poisoning, hidden data exfiltration paths in skill files, and supports semantic analysis to capture rewritten attack payloads, covering 28 mainstream Agent platforms.
Limitations
Currently supports only macOS and Linux; Windows support is planned. In offline environments, MCP registry queries require a network connection; otherwise, some trust scoring features are unavailable.
FAQ
Does AgentSeal require an internet connection to work?
The `guard` command runs entirely locally and does not require internet. The `scan` command also works offline when using a local Ollama model, but requires an API key for cloud models like OpenAI. `shield` and `scan-mcp` need a network connection to query the MCP registry.
Which AI Agents can it scan?
It supports 28 mainstream Agents including Claude Code, Claude Desktop, Cursor, Windsurf, VS Code, Gemini CLI, Codex CLI, Cline, Roo Code, Kilo Code, Copilot CLI, Aider, Continue, and Zed.
Installation guide for AI assistants
If your AI coding assistant (Claude Code, Cursor, TRAE etc.) can see this page, send it this message to auto-install:
Visit https://321skill.com/skills/agentseal/raw/index.md to read the original Skill definition (Markdown format) for agentseal, and install it according to the instructions.
Raw Markdown URL for AI: /skills/agentseal/raw/index.md