HeaderGuard
Working · 1.2 sScan a website's HTTP security headers (HSTS, CSP, framing, COOP/CORP, cookies). Score + fixes.
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Call this server's tools from your browser. Nothing to install.
Optional. 'Bearer HDRG-…' (HeaderGuard Pro license) for higher limits. Works without a key.
Requests go through mcptry because browsers can't call most MCP servers directly. Header values are sent to the server for that request only and are never stored or logged.
Tool list from our last check. Connect live to refresh it.
scan_headers Read-only
Scan the HTTP security headers of a public website. Returns a 0–100 score and A+–F grade (HTTPS 10, HSTS 15, CSP 25, framing 10, X-Content-Type-Options 10, Referrer-Policy 10, Permissions-Policy 5, COOP 5, CORP 5, cookies 5, minus up to 5 for version-leak headers; without HTTPS the score is capped at 39), each header's status and notes, recommended fix headers, and a link to the full report with copy-paste snippets for nginx, Apache, Cloudflare, Netlify, Vercel and Express. Read-only: it sends ordinary GET requests to the site (following up to 10 redirects, each safety-checked) and never reads page bodies. Same engine and scoring as the HeaderGuard JSON API (GET /api/scan).
URL or bare domain to scan, e.g. example.com or https://example.com/login. A bare domain is scanned as https://<domain>/ (plain HTTP if HTTPS does not answer).
Also return the full /api/scan JSON (redirect chain, all response headers with cookie values redacted, per-platform fix snippets) in structuredContent.raw. Larger output.
Tools (1)
scan_headersScan the HTTP security headers of a public website. Returns a 0–100 score and A+–F grade (HTTPS 10, HSTS 15, CSP 25, framing 10, X-Content-Type-Options 10, Referrer-Policy 10, Permissions-Policy 5, COOP 5, CORP 5, cookies 5, minus up to 5 for version-leak headers; without HTTPS the score is capped at 39), each header's status and notes, recommended fix headers, and a link to the full report with copy-paste snippets for nginx, Apache, Cloudflare, Netlify, Vercel and Express. Read-only: it sends ordinary GET requests to the site (following up to 10 redirects, each safety-checked) and never reads page bodies. Same engine and scoring as the HeaderGuard JSON API (GET /api/scan).
Scan the HTTP security headers of a public website. Returns a 0–100 score and A+–F grade (HTTPS 10, HSTS 15, CSP 25, framing 10, X-Content-Type-Options 10, Referrer-Policy 10, Permissions-Policy 5, COOP 5, CORP 5, cookies 5, minus up to 5 for version-leak headers; without HTTPS the score is capped at 39), each header's status and notes, recommended fix headers, and a link to the full report with copy-paste snippets for nginx, Apache, Cloudflare, Netlify, Vercel and Express. Read-only: it sends ordinary GET requests to the site (following up to 10 redirects, each safety-checked) and never reads page bodies. Same engine and scoring as the HeaderGuard JSON API (GET /api/scan).