← All skills
performing-security-headers-audit
92 / 100 · Low risk
Fine to try. Some of what it can do is expected: a security skill usually runs scanners and checks websites.
By mukul975/Anthropic-Cybersecurity-Skills (GitHub) · security · 35,906 stars · scanned at commit 54a7988
Auditing HTTP security headers including CSP, HSTS, X-Frame-Options,
Works with any agent that supports SKILL.md skills.
What this skill can do
Sends data to these websites: target.example.com, target.example.com$page, [^
This is disclosed by the author in the skill's SKILL.md or README. Expected for a security skill.
Found in 22 places.
Show 17 more
- skills/performing-security-headers-audit/SKILL.md, line 74
curl -s -I "https://target.example.com/" | head -20 - skills/performing-security-headers-audit/SKILL.md, line 83
curl -s -I "https://target.example.com/" | grep -i "strict-transport-security" - skills/performing-security-headers-audit/SKILL.md, line 93
curl -s -I "http://target.example.com/" | head -5 - skills/performing-security-headers-audit/SKILL.md, line 100
curl -s -I "https://target.example.com/login" | grep -i "set-cookie" - skills/performing-security-headers-audit/SKILL.md, line 104
curl -s "https://target.example.com/" | grep -oP "http://[^\"']+" | head -20 - skills/performing-security-headers-audit/SKILL.md, line 114
CSP=$(curl -s -I "https://target.example.com/" | grep -i "content-security-policy" | cut -d: -f2-) - skills/performing-security-headers-audit/SKILL.md, line 138
curl -s -I "https://target.example.com/" | grep -i "content-security-policy-report-only" - skills/performing-security-headers-audit/SKILL.md, line 155
curl -s -I "https://target.example.com/" | grep -i "x-frame-options" - skills/performing-security-headers-audit/SKILL.md, line 160
curl -s -I "https://target.example.com/" | grep -i "content-security-policy" | grep -o "frame-ancestors[^;]*" - skills/performing-security-headers-audit/SKILL.md, line 164
curl -s -I "https://target.example.com/" | grep -i "x-content-type-options" - skills/performing-security-headers-audit/SKILL.md, line 168
curl -s -I "https://target.example.com/" | grep -i "x-xss-protection" - skills/performing-security-headers-audit/SKILL.md, line 173
curl -s -I "https://target.example.com/" | grep -i "referrer-policy" - skills/performing-security-headers-audit/SKILL.md, line 184
curl -s -I -L "https://target.example.com/login" | grep -i "set-cookie" - skills/performing-security-headers-audit/SKILL.md, line 195
curl -s -I "https://target.example.com/login" | grep -i "set-cookie" | while read line; do - skills/performing-security-headers-audit/SKILL.md, line 219
curl -s -I "https://target.example.com/" | grep -i "permissions-policy" - skills/performing-security-headers-audit/SKILL.md, line 225
curl -s -I "https://target.example.com/" | grep -iE "(cross-origin-embedder|cross-origin-opener|cross-origin-resource)" - skills/performing-security-headers-audit/SKILL.md, line 231
curl -s -I "https://target.example.com/" | grep -iE "(server|x-powered-by|x-aspnet|x-generator)"
and 2 more places
Runs commands on your computer
The author does not mention this. Expected for a security skill.
Found in 6 places.
Show 3 more
Install
Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.
if [ -e ~/.agents/skills/'performing-security-headers-audit' ] || [ -L ~/.agents/skills/'performing-security-headers-audit' ]; then echo 'A skill folder named performing-security-headers-audit already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/mukul975/Anthropic-Cybersecurity-Skills' "$d" && git -C "$d" checkout --quiet '54a798831d2266a3ca61ce68a7acb80b81160d57' -- 'skills/performing-security-headers-audit' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/performing-security-headers-audit' ~/.agents/skills/'performing-security-headers-audit' && rm -rf "$d"; fi
Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'performing-security-headers-audit' ~/.claude/skills/'performing-security-headers-audit' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.
Badge for your README
The badge for mukul975/Anthropic-Cybersecurity-Skills shows the score of its lowest-scoring skill.
[](https://zalavijaysinh.github.io/skilltrust/repos/mukul975/Anthropic-Cybersecurity-Skills/)
Score history
| Date | Version | Score |
|---|
| 2026-11-08 | 54a7988 | 92 |
| 2026-11-07 | 54a7988 | 92 |