HTTP Headers Analysis for https://appsignal.com

Detected Technologies from Headers

See all in URL Inspect 2

Next.js

Vercel Active incidents

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

Excellent

DENY

X-Content-Type-Options

Missing

Not configured

Referrer-Policy

Good

no-referrer-when-downgrade

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-Content-Type-Options: nosniff
• Consider adding Permissions-Policy to control browser features

Performance Headers

Connection

Performance

close

Transfer-Encoding

Performance

chunked

Vary

Performance

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

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

Caching Headers

Age

Caching

0

Cache-Control

Caching

private, no-cache, no-store, max-age=0, must-revalidate

age: 0
cache-control: private, no-cache, no-store, max-age=0, must-revalidate

Content Headers

Content-Type

Content

text/html; charset=utf-8

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

Fri, 08 May 2026 04:22:48 GMT

Link

Other

URL https://https://www.appsignal.com/index.md

rel=alternate type=text/markdown

URL /fonts/SourceSans3-Variable.woff2

rel=preload as=font crossorigin=anonymous type=font/woff2

URL /fonts/SpecialGothicExpandedOne-Regular.woff2

rel=preload as=font crossorigin=anonymous type=font/woff2

URL /_next/static/css/318031b5150f21fb.css?dpl=dpl_Fvnvf7ZuEK4wQqDkYveRqEbMBcL2

rel=preload as=style

X-Matched-Path

Other

/

X-Vercel-Cache

Other

MISS

X-Vercel-Id

Other

cle1::iad1::n7p7v-1778214167838-6a84b3203498

date: Fri, 08 May 2026 04:22:48 GMT
link: <https://https://www.appsignal.com/index.md>; rel="alternate"; type="text/markdown", </fonts/SourceSans3-Variable.woff2>; rel=preload; as="font"; crossorigin="anonymous"; type="font/woff2", </fonts/SpecialGothicExpandedOne-Regular.woff2>; rel=preload; as="font"; crossorigin="anonymous"; type="font/woff2", </_next/static/css/318031b5150f21fb.css?dpl=dpl_Fvnvf7ZuEK4wQqDkYveRqEbMBcL2>; rel=preload; as="style"
x-matched-path: /
x-vercel-cache: MISS
x-vercel-id: cle1::iad1::n7p7v-1778214167838-6a84b3203498

Recommendations

Enable compression (gzip/brotli) to improve performance

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