mcp-audit

mcp-audit is a skill for Claude Code from aris4u-dev/aris4u. It costs 179 tokens per session (621 once invoked), scanned A, original, no licence file.

A security audit tool for MCP servers connected to Claude Code. It examines the local programs they run, where they came from, and whether their versions are fixed or change automatically.

In plain words
What is it for?
It checks MCP server binaries and scripts, supply-chain versioning such as @latest, and duplicates between global settings and a repository's .mcp.json file.
Why use it?
It helps reveal risks from running local code, unpinned package versions, and duplicate server configurations.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the aris4u plugin — 25 skills, 15 agents, 7 hooks, 1 MCP server shipped together

Good fit It checks MCP server binaries and scripts, supply-chain versioning such as @latest, and duplicates between global settings and a repository's .mcp.json file.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/aris4u-dev/aris4u/mcp-audit
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add aris4u-dev/aris4u --skill mcp-audit
Clone the repo
git clone --depth 1 https://github.com/aris4u-dev/aris4u

Made for: Claude Code.

Or install aris4u, the plugin that ships this one along with the rest of its 25 skills, 15 agents, 7 hooks, 1 MCP server.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for mcp-audit

README.md
[![agentmods](https://agentmods.dev/badge/skills/aris4u-dev/aris4u/mcp-audit.svg)](https://agentmods.dev/skills/aris4u-dev/aris4u/mcp-audit)
Your own site
<a href="https://agentmods.dev/skills/aris4u-dev/aris4u/mcp-audit"><img src="https://agentmods.dev/badge/skills/aris4u-dev/aris4u/mcp-audit.svg" alt="Measured on agentmods" height="20"></a>
Per session 179 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 621 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00179 $0.00621
Opus 5 $0.00089 $0.00311
Sonnet 5 $0.00036 $0.00124
Haiku 4.5 $0.00018 $0.00062

Measured 7d ago against content hash 170af65bdd7b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

mcp-audit scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/mcp-audit/SKILL.md · 51 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 7d ago First seen · 51 lines · 179 tokens per session scan A 170af65bdd7b

Subscribe to this mod's changes

mcp-audit is a skill published in the GitHub repository aris4u-dev/aris4u (0 stars, last pushed 2mo ago), with no licence file. It adds 179 tokens to every session and 621 once invoked, about $0.0009 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-01.

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