What is 42crunch-audit?

An API security audit tool for OpenAPI Specification files, which describe how an API works. It checks the file for security issues and helps address findings that block its security quality score.

Use it to audit an OpenAPI file, improve its security score, enrich it with a data dictionary, and fix issues that block the score.

It helps find security problems in an API design before they reach users. It also gives a way to work through audit findings in the API description.

42crunch-audit — Skill for Claude Code by 42Crunch-AI/claude-plugins

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 42Crunch-AI/claude-plugins --skill 42crunch-audit

Clone the repo

git clone --depth 1 https://github.com/42Crunch-AI/claude-plugins

Made for: Claude Code.

Or install 42crunch-api-security-testing, the plugin that ships this one along with the rest of its 5 skills.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/42crunch-ai/claude-plugins/42crunch-audit/github.svg)](https://agentmods.dev/skills/42crunch-ai/claude-plugins/42crunch-audit)

Your own site

<a href="https://agentmods.dev/skills/42crunch-ai/claude-plugins/42crunch-audit"><img src="https://agentmods.dev/badge/skills/42crunch-ai/claude-plugins/42crunch-audit/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/42crunch-ai/claude-plugins/42crunch-audit"><img src="https://agentmods.dev/badge/skills/42crunch-ai/claude-plugins/42crunch-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 130 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,319 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.

Model	Per session	Once invoked
Fable 5.1	$0.00130	$0.01319
Opus 5.5	$0.00052	$0.00528
Sonnet 5.5	$0.00026	$0.00264
Haiku 4.5	$0.00013	$0.00132

Measured 4d ago against content hash 1d177bfe701a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

42crunch-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 4d 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.

plugins/api-security-testing/skills/42crunch-audit/SKILL.md · 107 lines

The source is not reproduced here

No licence file

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.

4d ago Changed · +19 lines · +13 tokens per session 1d177bfe701a
2mo ago First seen · 88 lines · 117 tokens per session scan A d4e9bd1b5f2f

Subscribe to this mod's changes

42crunch-audit is a skill published in the GitHub repository 42Crunch-AI/claude-plugins (1 stars, last pushed 4d ago), with no licence file. It adds 130 tokens to every session and 1,319 once invoked, about $0.0005 per session on Opus 5.5. 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 2026-08-30.

Backend and APIs Security

42crunch-audit next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
42crunch-audit42Crunch-AI/claude-plugins	Skill	1	4d ago	none	A	130	Claude Code
mem0-oss-to-platformmem0ai/mem0	Skill	69k	yesterday	Apache-2.0	A	217	Claude Code, Codex
azure-mgmt-botservice-dotnetmicrosoft/skills	Skill	3.2k	yesterday	MIT	A	78	Claude Code
fastapi-router-pymicrosoft/skills	Skill	3.2k	yesterday	MIT	A	46	Claude Code
dev-runtimelangwatch/langwatch	Skill	5.0k	today	Apache-2.0	A	172	Claude Code
api-designericrisco/rsc-harness	Skill	529	3d ago	MIT	A	105	Claude Code, Codex
migrate-segw-to-raparc-mcp/arc-1	Skill	253	yesterday	MIT	A	106	Claude Code