HTTP Headers Analysis for https://dev.kernel.sh

Detected Technologies from Headers

See all in URL Inspect 2

Next.js

Vercel

HTTP Security Headers

Status

Strict-Transport-Security

Present

max-age=63072000

Content-Security-Policy

Missing

Not configured Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Missing

Not configured

X-Content-Type-Options

Missing

Not configured

Referrer-Policy

Missing

Not configured

Permissions-Policy

Missing

Not configured

Recommendations

• Increase HSTS max-age to at least 1 year and add includeSubDomains
• Add Content-Security-Policy header to prevent XSS attacks
• Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
• Add X-Content-Type-Options: nosniff
• Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
• Consider adding Permissions-Policy to control browser features

Performance Headers

Connection

Performance

close

Vary

Performance

rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch

connection: close
vary: rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch

Caching Headers

Age

Caching

11838

Cache-Control

Caching

public, max-age=0, must-revalidate

Etag

Caching

"feqk26qkkz20lm"

age: 11838
cache-control: public, max-age=0, must-revalidate
etag: "feqk26qkkz20lm"

Content Headers

Content-Length

Content

94105

Content-Type

Content

text/html; charset=utf-8

content-length: 94105
content-type: text/html; charset=utf-8

Server Headers

Server

Vercel

X-Powered-By

Server

Next.js

server: Vercel
x-powered-by: Next.js

CORS Headers

No CORS headers found

Cookies Headers

No cookies headers found

Other Headers

Date

Other

Tue, 01 Sep 2026 01:50:25 GMT

Link

Other

URL /llms.txt

rel=describedby type=text/markdown

URL /sitemap.xml

rel=sitemap type=application/xml

URL /openapi.json

rel=service-desc type=application/vnd.oai.openapi+json

URL /.well-known/mcp

rel=mcp

X-Matched-Path

Other

/

X-Nextjs-Prerender

Other

1

X-Nextjs-Stale-Time

Other

300

X-Vercel-Cache

Other

STALE

X-Vercel-Id

Other

iad1::iad1::bqlht-1788759447402-01537804626e

date: Tue, 01 Sep 2026 01:50:25 GMT
link: </llms.txt>; rel="describedby"; type="text/markdown", </sitemap.xml>; rel="sitemap"; type="application/xml", </openapi.json>; rel="service-desc"; type="application/vnd.oai.openapi+json", </.well-known/mcp>; rel="mcp"
x-matched-path: /
x-nextjs-prerender: 1
x-nextjs-stale-time: 300
x-vercel-cache: STALE
x-vercel-id: iad1::iad1::bqlht-1788759447402-01537804626e

Recommendations

Enable compression (gzip/brotli) to improve performance

Consider removing X-Powered-By header to hide server technology