Can this skill help prevent XSS attacks?

By identifying missing or weak Content Security Policies (CSP), this skill provides recommendations that are essential for mitigating Cross-Site Scripting (XSS) vulnerabilities.

What headers does this Claude Code skill analyze?

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

How do I activate the security header scan?

Simply ask Claude to 'analyze security headers' or 'check HTTP security' followed by the domain name or URL you wish to audit.

Does this skill provide a security score?

Yes, the skill generates a detailed report that includes a letter grade and a numerical score based on the effectiveness of your current header configuration.

Security Header Analyzer

Name: Security Header Analyzer
Author: jeremylongshore

byjeremylongshore

•

884

Security & Testing

Analyzes HTTP security headers to identify vulnerabilities and provide actionable recommendations for website hardening.

About

The Security Header Analyzer skill empowers Claude to perform automated security audits of any website's HTTP headers. By fetching and evaluating headers against industry best practices, it identifies missing or misconfigured protections such as HSTS, Content Security Policy, and X-Frame-Options. The skill generates a comprehensive report featuring a security grade, a numerical score, and specific remediation steps, making it an indispensable tool for developers and security professionals aiming to reduce their attack surface and ensure compliance.

Key Features

Detailed recommendations for missing or misconfigured headers
884 GitHub stars
Comprehensive security grading and vulnerability scoring
Actionable guidance for mitigating XSS and downgrade attacks
Real-time HTTP security header extraction and analysis
Detection of HSTS, CSP, XSS-Protection, and Referrer-Policy issues

Use Cases

Auditing the security posture of a live domain or web application
Preparing for security compliance checks and website hardening
Verifying the correct implementation of HSTS and Content Security Policies

About

Key Features

Detailed recommendations for missing or misconfigured headers
884 GitHub stars
Comprehensive security grading and vulnerability scoring
Actionable guidance for mitigating XSS and downgrade attacks
Real-time HTTP security header extraction and analysis
Detection of HSTS, CSP, XSS-Protection, and Referrer-Policy issues

Use Cases

Auditing the security posture of a live domain or web application
Preparing for security compliance checks and website hardening
Verifying the correct implementation of HSTS and Content Security Policies