mcp-scanner: Scan MCP servers for potential threats & security findings

by cisco-ai-defense · MCP Server · ★ 1.1k

Last updated: · Indexed by AgentSkillsHub · Auto-synced every 8h

How to install mcp-scanner

uv tool install --python 3.13 cisco-ai-mcp-scanner
uv tool install --python 3.13 --from git+https://github.com/cisco-ai-defense/mcp-scanner cisco-ai-mcp-scanner

Taken from the project's README on GitHub. Check the security audit before running it.

Security audit verdict: SAFE · quality 78/100

None of the 42 rules matched — no credential harvesting, no data exfiltration, no curl-pipe-shell installer. Scanned against 42 published rules built on the SlowMist agent-security taxonomy, refreshed every 8 hours. Full audit →

The quality score combines nine heuristic checks of the repo and its README: completeness, clarity, specificity, examples, structure, agent readiness, step-by-step content, instruction quality and security notes. It rates how well the project explains itself to an agent, not the code.

agentsaimcpsecurity

Quick Facts

Stars1,110
Forks158
LanguagePython
CategoryMCP Server
LicenseApache-2.0
Quality Score78/100
Open Issues73
Last Updated2026-11-06
Created2025-09-24
Platformsmcp, python
Est. Tokens~19k

About mcp-scanner

MCP Scanner A Python tool for scanning MCP (Model Context Protocol) servers and tools for potential security findings. The MCP Scanner combines Cisco AI Defense inspect API, YARA rules and LLM-as-a-judge to detect malicious MCP tools. Overview The MCP Scanner provides a comprehensive solution for scanning MCP servers and tools for security findings.

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How this security grade is produced

Grades come from a rule-based scan built on the SlowMist agent-security taxonomy: 42 published rules, covering credential harvesting, data exfiltration, curl | sh installers and more. It is a first-layer scan, not a manual audit — we say so rather than overstate it.

The scale of the problem is documented independently: Liu et al. (2026), in a study of 31,132 agent skills, report that 26.1% contain security vulnerabilities. Our own full-catalog census is published as a citable open dataset.

Sources & who's responsible:

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