Best Claude Code Security skills

1,284

Ranked by quality score. Browse all 1,284 Security skills

Security skills fall into two groups. The first turns Claude into a reviewer: harnesses like Deepsec that hunt vulnerabilities in a codebase, defence-in-depth checklists, Sigma-rule threat hunting, and audits of authentication, secrets handling and input validation. The second gives Claude reference material a pentester would carry, such as the SecLists wordlists and OWASP testing guides, so its findings cite something more than intuition.

The reason to install one is that AI-generated code fails in predictable ways: string-built SQL, secrets in config, unchecked redirects, permissive CORS. A review skill that runs before you open a pull request catches the class of bug a rushed human reviewer skims past. They are also the right tool when you inherit a service and want a first pass at its attack surface before reading every line yourself.

A skill installs as ~/.claude/skills/<name>/SKILL.md, plus whatever scripts and lists the folder ships; the entry page shows the command. Security skills deserve the same scrutiny they apply to your code, since installing one runs a stranger's instructions with your credentials: read the SKILL.md, note which tools it requests, and prefer entries whose source repository is active. Then start a new session so Claude picks it up.

Top 20 Security skills

Defense in Depth — Security skill for Claude Code

Defense in Depth

72

Implement multi-layered testing and security best practices.

obra avatarobra Security community
Free Code — Security skill for Claude Code

Free Code

67

The free build of Claude Code. All telemetry removed, security-prompt guardrails stripped, all experimental features enabled.

paoloanzn avatarpaoloanzn Security community
Deepsec — Security skill for Claude Code

Deepsec

67

Deepsec is a security harness for finding vulnerabilities in your codebase powered by coding agents

vercel-labs avatarvercel-labs Security community
Google Workspace Model Armor — Security skill for Claude Code

Google Workspace Model Armor

65

Filter user-generated content for safety

Google Workspace avatarGoogle Workspace Security community
Google Workspace Alert Center — Security skill for Claude Code

Google Workspace Alert Center

65

Manage security alerts

Google Workspace avatarGoogle Workspace Security community
Google Workspace Cloud Identity — Security skill for Claude Code

Google Workspace Cloud Identity

65

Manage Cloud Identity groups and memberships

googleworkspace avatargoogleworkspace Security community
T3MP3ST — Security skill for Claude Code

T3MP3ST

65

autonomous red teaming platform; multi-agent offensive-security meta-harness

elder-plinius avatarelder-plinius Security community
Fastapi Review — Security skill for Claude Code

Fastapi Review

63

Review a FastAPI application for architecture, async correctness, dependency injection, Pydantic schemas, security, performance, and testability.

affaan-m avataraffaan-m Security community
Pal — Security skill for Claude Code

Pal

63

Multi-model AI integration — chat, debugging, code review, planning, security audit ·

BeehiveInnovations avatarBeehiveInnovations Security community
Claude Code Security Review — Security skill for Claude Code

Claude Code Security Review

63

An AI-powered security review GitHub Action using Claude to analyze code changes for security vulnerabilities.

anthropics avataranthropics Security community
Anthropic-Cybersecurity-Skills — Security skill for Claude Code

Anthropic-Cybersecurity-Skills

63

734+ structured cybersecurity skills for AI agents · MITRE ATT&CK mapped · agentskills.io open standard · Works with Claude Code, GitHub Copilot, OpenAI…

mukul975 avatarmukul975 Security community
Sanyuan Skills — Security skill for Claude Code

Sanyuan Skills

61

Expert code review skill: SOLID, security, performance, error handling, boundary conditions.

sanyuan0704 avatarsanyuan0704 Security community
Skill Scanner — Security skill for Claude Code

Skill Scanner

61

Security Scanner for Agent Skills

cisco-ai-defense avatarcisco-ai-defense Security community
Security Scan Report — Security skill for Claude Code

Security Scan Report

59

Generated: 2026-04-10 20:48 UTC Skills scanned: 134 Total findings: 836 Critical: 32 · High: 50 · Safe skills: 100/134

K-Dense-AI avatarK-Dense-AI Security community
Security Guardian — Security skill for Claude Code

Security Guardian

57

Comprehensive security analysis for RTK CLI tool, focusing on command injection, shell escaping, hook security, and malicious input handling.

rtk-ai avatarrtk-ai Security community
Cve Mcp Server — Security skill for Claude Code

Cve Mcp Server

57

Production-grade MCP server giving Claude 27 security intelligence tools across 21 APIs — CVE lookup, EPSS scoring, CISA KEV, MITRE ATT&CK, Shodan,…

mukul975 avatarmukul975 Security community
promptmap — Security skill for Claude Code

promptmap

57

Security scanner for custom LLM apps. White-box and black-box prompt injection testing.

utkusen avatarutkusen Security community
mcp-scan (Invariant Labs) — Security skill for Claude Code

mcp-scan (Invariant Labs)

56

MCP security scanner with proxy mode for real-time scanning without infrastructure changes.

invariantlabs-ai avatarinvariantlabs-ai Security community
Imcodes — Security skill for Claude Code

Imcodes

56

The IM for agents. Shared Agent Context & Memory, supervised execution, and cross-agent audit across AI providers.

im4codes avatarim4codes Security community
MCP Security Checklist (SlowMist) — Security skill for Claude Code

MCP Security Checklist (SlowMist)

55

Comprehensive checklist: input validation, rate limiting, RBAC, credential management, container hardening.

slowmist avatarslowmist Security community

These are 20 of 1,284. See every Security skill, searchable and sortable by stars or name.