Is this a replacement for a full penetration test?

No, this is a targeted tool for header configuration. It should be used as one part of a broader security strategy alongside other vulnerability scanners and code audits.

Can it help fix the issues it finds?

Yes, the report includes specific recommendations and implementation examples that you can use to resolve identified security gaps.

What headers does this skill analyze?

It checks for critical security headers including Content-Security-Policy (CSP), HTTP Strict Transport Security (HSTS), X-Frame-Options, X-Content-Type-Options, and Referrer-Policy.

How does the grading system work?

The skill evaluates headers based on industry-standard security benchmarks, assigning a score and grade based on the presence, configuration, and effectiveness of your security headers.

Can I use this for internal development URLs?

As long as the URL is accessible via the WebFetch tool from Claude's environment, it can analyze the headers and provide a report.

Security Headers Analyzer

Name: Security Headers Analyzer
Author: jeremylongshore

byjeremylongshore

•

883

Security & Testing

Evaluates HTTP security headers of any domain to identify vulnerabilities and provide actionable hardening recommendations.

About

The Security Headers Analyzer is a specialized Claude Code skill designed to strengthen web application security by auditing HTTP response headers. It automatically fetches headers from a target URL, evaluates them against industry best practices—including HSTS, CSP, and X-Frame-Options—and generates a comprehensive report featuring a security grade and prioritized improvement steps. This skill is an essential tool for developers and security engineers performing rapid audits, ensuring compliance with web security standards, and mitigating risks like Cross-Site Scripting (XSS) and clickjacking.

Key Features

Actionable remediation steps for all identified vulnerabilities
Automated HTTP header extraction and real-time analysis
Integration with web fetching tools for live site auditing
Comprehensive security grading and scoring system
883 GitHub stars
Detection of missing or misconfigured HSTS, CSP, and XSS protections

Use Cases

Identifying and troubleshooting misconfigured Content Security Policies
Ensuring compliance with security best practices before production deployment
Performing a quick security audit on a live website or staging environment

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add jeremylongshore/claude-code-plugins-plus-skills security-headers-analyzer

For use in Claude.ai and ChatGPT

Download Skill

GitHub