What is 42crunch-api-security-testing?

A combined API security workflow for an OpenAPI Specification, the file that describes an API's endpoints and behavior. It runs a design audit and a live scan together.

Use it to audit an API description, scan the running API, run the complete security pipeline, and address the resulting findings.

It brings the two main security checks into one pipeline instead of treating them as separate requests. This helps when the user wants the full API security process or has not named a specific phase.

42crunch-api-security-testing — Skill for Claude Code by 42Crunch-AI

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-api-security-testing

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-api-security-testing/github.svg)](https://agentmods.dev/skills/42crunch-ai/claude-plugins/42crunch-api-security-testing)

Your own site

<a href="https://agentmods.dev/skills/42crunch-ai/claude-plugins/42crunch-api-security-testing"><img src="https://agentmods.dev/badge/skills/42crunch-ai/claude-plugins/42crunch-api-security-testing/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-api-security-testing"><img src="https://agentmods.dev/badge/skills/42crunch-ai/claude-plugins/42crunch-api-security-testing.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 2,892 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	$0.02892
Opus 5.5	$0.00052	$0.01157
Sonnet 5.5	$0.00026	$0.00578
Haiku 4.5	$0.00013	$0.00289

Measured 4d ago against content hash 095b36c6c9df, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

42crunch-api-security-testing 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-api-security-testing/SKILL.md · 217 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 · +46 lines 095b36c6c9df
2mo ago First seen · 171 lines · 130 tokens per session scan A 4af2fb89c6d8

Subscribe to this mod's changes

42crunch-api-security-testing 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 2,892 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.