analyzing-security-headers

Analyze HTTP security headers of web domains to identify vulnerabilities and misconfigurations. Use when you need to audit website security headers, assess header compliance, or get security recommendations for web applications. Trigger with phrases like "analyze security headers", "check HTTP headers", "audit website security headers", or "evaluate CSP and HSTS configuration".

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Forks 31

Install this agent skill to your Project

npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/data/analyzing-security-headers

SKILL.md

Analyzing Security Headers

Overview

This skill provides automated assistance for the described functionality.

Prerequisites

Before using this skill, ensure:

Target URL or domain name is accessible
Network connectivity for HTTP requests
Permission to scan the target domain
Optional: Save results to {baseDir}/security-reports/

Instructions

Collect the target URL/domain and environment context (CDN/proxy, redirects).
Fetch response headers (HTTP/HTTPS) and capture redirects/cookies.
Compare headers to recommended baselines and score gaps.
Provide concrete remediation steps and verify fixes.

See {baseDir}/references/implementation.md for detailed implementation guide.

Output

The skill produces:

Primary Output: Security headers analysis report

Report Structure:

# Security Headers Analysis - example.com

## Error Handling

See `{baseDir}/references/errors.md` for comprehensive error handling.

## Examples

See `{baseDir}/references/examples.md` for detailed examples.

## Resources

- OWASP Secure Headers Project: https://owasp.org/www-project-secure-headers/
- MDN Security Headers Guide: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers#security
- Security Headers Scanner: https://securityheaders.com/
- CSP Reference: https://content-security-policy.com/
- HSTS Preload: https://hstspreload.org/