Agent X Alpha

HTTP Header Inspector

Server API

Inspect HTTP response headers of any website instantly. Analyze security, caching, and server information in a clean view.

Quick Presets:

OWASP Security Audit

Grades your site (A+ to F) on 6 vital security headers including HSTS, CSP, and X-Frame-Options.

Cache & CDN Analysis

Inspect Cache-Control, ETag, Age, and CDN edge cache hit ratios (Cloudflare, Fastly, Akamai).

cURL & Fetch Snippets

Generates ready-to-paste cURL CLI commands and JavaScript fetch() code snippets to reproduce queries.

Frequently Asked Questions

What are HTTP response headers and why should they be analyzed?
HTTP response headers are metadata sent by a web server alongside web content. They govern caching policies, content compression, security controls (HSTS, CSP, X-Frame-Options), cookies, and server architecture details.
Which security headers does this tool audit?
The inspector evaluates critical web security headers including Strict-Transport-Security (HSTS), Content-Security-Policy (CSP), X-Frame-Options (clickjacking defense), X-Content-Type-Options (MIME sniffing defense), and Referrer-Policy.
Does this tool follow HTTP redirects?
Yes. It captures the initial HTTP status code and displays any 301/302/307/308 redirect chains to verify that canonical HTTPS and domain redirects are configured properly.
Why does this tool use a secure backend proxy route?
Web browsers enforce Cross-Origin Resource Sharing (CORS), preventing direct client-side inspection of external server response headers. Our lightweight server route fetches headers safely over TLS without logging your requested URL.
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