Claude Code Skills·Claude Skills·The open SKILL.md registry for Claude
ClaudSkills / Security / security-misc

Mcp Server Vet

Category: Security  ·  Sub-category: security-misc  ·  Last updated:
ai:mcp
Read-only safety inspection of a third-party MCP server BEFORE it is added to a config or trusted. Reads the server's declared tool descriptions, input schemas, scopes, transport, and env/secret surface (not just its README), compares declared behavior against what the tools actually expose, scans for tool-description poisoning and prompt injection, over-broad or undeclared scopes, egress and credential access, config tampering, and hidden Unicode, and returns an add/decline/sandbox verdict for a human to approve. Never installs, never auto-trusts. Use when evaluating an external MCP server before adding it to .mcp.json or enabling it. Do not use to vet a third-party agent skill or plugin (use skill-vet), to review first-party product code (use review-hard or security-review), or to fetch a remote server definition from the web (record its origin via capture-references, then obtain a local copy out of band into a quarantine directory first).
Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

Act as a senior application-security engineer vetting a third-party MCP server before it is added to a config or trusted.

What this skill does

Mcp Server Vet is a community-contributed Claude Code skill in the security-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/mcp-server-vet/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when evaluating an external MCP server before adding it to .mcp.

Who uses this skill

The Mcp Server Vet Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 186,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/mcp-server-vet
curl -L https://claudskills.com/skills/mcp-server-vet/SKILL.md \
  -o ~/.claude/skills/mcp-server-vet/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/mcp-server-vet/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/mcp-server-vet/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\mcp-server-vet\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Mcp Server Vet Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/mcp-server-vet/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Mcp Server Vet skill do?
Read-only safety inspection of a third-party MCP server BEFORE it is added to a config or trusted. Reads the server's declared tool descriptions, input schemas, scopes, transport, and env/secret surface (not just its README), compares declared behavior against what the tools actually expose, scans for tool-description poisoning and prompt injection, over-broad or undeclared scopes, egress and credential access, config tampering, and hidden Unicode, and returns an add/decline/sandbox verdict for a human to approve. Never installs, never auto-trusts. Use when evaluating an external MCP server before adding it to .mcp.json or enabling it. Do not use to vet a third-party agent skill or plugin (use skill-vet), to review first-party product code (use review-hard or security-review), or to fetch a remote server definition from the web (record its origin via capture-references, then obtain a local copy out of band into a quarantine directory first).
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Mcp Server Vet skill?
Use Mcp Server Vet when your Claude Code task falls under the Security category — specifically in the security misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Mcp Server Vet" or describe the task and let Claude pick). Browse related skills at /category/security/.
What is a Claude Code skill and how does the Mcp Server Vet skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Mcp Server Vet is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
Mozurok. (2026). Mcp Server Vet [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/mcp-server-vet/
BibTeX
@misc{mcp-server-vet-2026,
  author    = {Mozurok},
  title     = {Mcp Server Vet [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/mcp-server-vet/}
}

Embed this skill

Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →

Badge
[![ClaudSkills](https://claudskills.com/badge/mcp-server-vet.svg)](https://claudskills.com/skills/mcp-server-vet/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)
<script>
<script src="https://claudskills.com/embed/mcp-server-vet.js" async></script>
<iframe>
<iframe src="https://claudskills.com/embed/mcp-server-vet.html" width="100%" height="160" frameborder="0" loading="lazy" title="ClaudSkills: Mcp Server Vet"></iframe>

Security scan

Grade A · scanned 2026-08-15 — free static scan against the OWASP Agentic Skills Top 10.

The scan flagged 1 of 10 categories (data-exfil), including a high-severity pattern. Patterns shown inside code fences are weighted as examples rather than instructions — read the grading methodology for what this does and does not guarantee.

Show this grade on your repo (click to copy):

[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/mcp-server-vet/#security)

Free. No spam. Unsubscribe in one click.

More Security skills

Browse all Security skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Security skills → Top 100 skills
Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills.  ·  What's New  ·  Install guide  ·  About  ·  llms.txt

Part of Acreator Store — Adam Lankamer's AI tools: PerfectStudio · Ucaption · UTagger · AutoXPoster · TestYourSkills · AutomationFlows · Au Naturel · Telegram @acreatorstore

Categories

Use cases

Popular tags

Learn

Site