agentic-security-scanner

agentic-security-scanner is a skill for Claude Code, Codex from JPeetz/agent-skills. It costs 63 tokens per session (1,776 once invoked), scanned A, original, no licence file.

A security scanner for AI-agent skills that checks them against the OWASP Agentic Skills Top 10, a list of common security risks for agent tools.

In plain words
What is it for?
Use it to validate skills in automated build checks and produce SARIF reports, a standard format for security findings.
Why use it?
It helps detect prompt injection, malicious code, data theft, supply-chain problems, and lost security metadata before a skill is used.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

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.

agentmods
npx agentmods add skills/jpeetz/agent-skills/agentic-security-scanner
Any agent
npx skills add JPeetz/agent-skills --skill agentic-security-scanner
Clone the repo
git clone --depth 1 https://github.com/JPeetz/agent-skills

Made for: Claude Code, Codex.

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 agentic-security-scanner

README.md
[![agentmods](https://agentmods.dev/badge/skills/jpeetz/agent-skills/agentic-security-scanner.svg)](https://agentmods.dev/skills/jpeetz/agent-skills/agentic-security-scanner)
Your own site
<a href="https://agentmods.dev/skills/jpeetz/agent-skills/agentic-security-scanner"><img src="https://agentmods.dev/badge/skills/jpeetz/agent-skills/agentic-security-scanner.svg" alt="Measured on agentmods" height="20"></a>
Per session 63 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,776 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
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 $0.00063 $0.01776
Opus 5 $0.00032 $0.00888
Sonnet 5 $0.00013 $0.00355
Haiku 4.5 $0.00006 $0.00178

Measured 6d ago against content hash 4458fc2abe7e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

agentic-security-scanner scanned grade A with 1 finding 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 6d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/scan_skill.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

encoded payloads, suspicious curl/wget patterns
skills/security/agentic-security-scanner/SKILL.md · 206 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 6d ago First seen · 206 lines · 63 tokens per session scan A 4458fc2abe7e

Subscribe to this mod's changes

agentic-security-scanner is a skill published in the GitHub repository JPeetz/agent-skills (5 stars, last pushed 6d ago), with no licence file. It adds 63 tokens to every session and 1,776 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.