Content Security Policy Headers includes pricing or quota commentary; 11 code blocks for direct copy-paste. At roughly 1,863 words the SKILL.md is on the longer end of the catalog distribution.
Content Security Policy Headers sits in the Security category under the web-security sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.
These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.
A real CSP is short, strict, and rolled out gradually. The accumulated industry consensus — Google's web.dev guide, OWASP's cheat sheet, and the W3C CSP3 spec — points at the same baseline: nonce-based or hash-based script-src with 'strict-dynamic', object-src 'none', base-uri 'none'. That's it. Everything else (allowlists of CDN URLs, unsafe-inline, unsafe-eval) is what we're trying to leave behind.
Content-Security-Policy:
script-src 'nonce-{RANDOM}' 'strict-dynamic';
object-src 'none';
base-uri 'none';Content Security Policy Headers is a community-contributed Claude Code skill in the web-security sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/content-security-policy-headers/ and loads when your prompt matches the skill's trigger.
When to invoke it: Use when designing or fixing a Content Security Policy on a real site, choosing between nonce-based and hash-based CSP, adding strict-dynamic, debugging "Refused to execute inline script" errors, deploying CSP in report-only mode first, configuring report-to / report-uri, or auditing an existing policy for unsafe-inline / unsafe-eval / wildcards. Triggers: "CSP blocks legitimate inline script", strict-dynamic, nonce-{RANDOM}, sha256-{HASH}, object-src none, base-uri none, frame-ancestors, Trusted Types, X-Content-Security-Policy obsolete, report-only vs enforced.
The Content Security Policy Headers Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 116,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).
mkdir -p ~/.claude/skills/content-security-policy-headers curl -L https://claudskills.com/skills/content-security-policy-headers/SKILL.md \ -o ~/.claude/skills/content-security-policy-headers/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/content-security-policy-headers/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/content-security-policy-headers/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\content-security-policy-headers\SKILL.md on Windows. See the full install guide for step-by-step instructions.
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SKILL.md from the source repository to ~/.claude/skills/content-security-policy-headers/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Content Security Policy Headers is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at /learn/what-is-a-claude-skill/.If you reference this skill in a blog post, paper, or documentation, you can cite it as:
@misc{content-security-policy-headers-2026,
author = {curiositech},
title = {Content Security Policy Headers [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/content-security-policy-headers/}
}Browse all Security skills in the ClaudSkills registry, or explore these other picks from the same category:
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SKILL.md files, not affiliated with, endorsed by, or sponsored by Anthropic.