Security Report Summary
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Site: https://clerk.com/
IP Address: 76.76.21.21
Report Time: 05 Nov 2026 17:09:59 UTC
Headers:
  • Referrer-Policy
  • Strict-Transport-Security
  • X-Content-Type-Options
  • X-Frame-Options
  • Content-Security-Policy
  • Permissions-Policy
Advanced:
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Missing Headers
Content-Security-PolicyContent Security Policy is an effective measure to protect your site from XSS attacks. By whitelisting sources of approved content, you can prevent the browser from loading malicious assets.
Permissions-PolicyPermissions Policy is a new header that allows a site to control which features and APIs can be used in the browser.
Raw Headers
HTTP/2103
serverVercel
x-vercel-idFyxobaaYhkOzzL0wfyd7NxMY6y1cNERf
HTTP/2 200
access-control-allow-origin*
age8033
cache-controlpublic, max-age=0, must-revalidate
content-dispositioninline
content-encodinggzip
content-typetext/html; charset=utf-8
dateThu, 05 Nov 2026 17:09:59 GMT
etagW/"47da136420a85599179ebdbc3d293fe3"
link</.well-known/api-catalog>; rel="api-catalog"; type="application/linkset+json", </llms.txt>; rel="describedby"; type="text/plain"
referrer-policysame-origin
serverVercel
set-cookie__signed_in=false; Path=/
set-cookieconsent-required=1; Path=/; Secure; SameSite=lax
strict-transport-securitymax-age=63072000
varyrsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch
x-clerk-auth-reasonsession-token-and-uat-missing
x-clerk-auth-statussigned-out
x-content-type-optionsnosniff
x-download-optionsnoopen
x-frame-optionsdeny
x-matched-path/~
x-nextjs-prerender1
x-nextjs-stale-time300
x-vercel-cacheHIT
x-vercel-iddub1::h85lr-1793898599716-4721c70da277
x-xss-protection1
Upcoming Headers
Cross-Origin-Embedder-PolicyCross-Origin Embedder Policy allows a site to prevent assets being loaded that do not grant permission to load them via CORS or CORP.
Cross-Origin-Opener-PolicyCross-Origin Opener Policy allows a site to opt-in to Cross-Origin Isolation in the browser.
Cross-Origin-Resource-PolicyCross-Origin Resource Policy allows a resource owner to specify who can load the resource.
Additional Information
serverServer value has been changed. Typically you will see values like "Microsoft-IIS/8.0" or "nginx 1.7.2".
access-control-allow-originThis is a very lax CORS policy. Such a policy should only be used on a public CDN.
referrer-policyReferrer Policy is a new header that allows a site to control how much information the browser includes with navigations away from a document and should be set by all sites.
serverServer value has been changed. Typically you will see values like "Microsoft-IIS/8.0" or "nginx 1.7.2".
strict-transport-securityHTTP Strict Transport Security is an excellent feature to support on your site and strengthens your implementation of TLS by getting the User Agent to enforce the use of HTTPS.
x-content-type-optionsX-Content-Type-Options stops a browser from trying to MIME-sniff the content type and forces it to stick with the declared content-type. The only valid value for this header is "X-Content-Type-Options: nosniff".
x-frame-optionsX-Frame-Options tells the browser whether you want to allow your site to be framed or not. By preventing a browser from framing your site you can defend against attacks like clickjacking.
x-xss-protectionX-XSS-Protection sets the configuration for the XSS Auditor built into older browsers. The recommended value was "X-XSS-Protection: 1; mode=block" but you should now look at Content Security Policy instead.