HTTP Headers Analysis for https://vitalsource.com

Detected Technologies from Headers

See all in URL Inspect 1

Cloudflare CDN

HTTP Security Headers

Status

Strict-Transport-Security

Good

max-age=63072000; includeSubDomains

Content-Security-Policy

Missing

Not configured Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Good

SAMEORIGIN

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Good

strict-origin-when-cross-origin

Permissions-Policy

Missing

Not configured

Recommendations

• Consider adding 'preload' to HSTS for maximum security
• Add Content-Security-Policy header to prevent XSS attacks
• Consider adding Permissions-Policy to control browser features

Performance Headers

Connection

Performance

close

Transfer-Encoding

Performance

chunked

Vary

Performance

Accept-Encoding, Origin

connection: close
transfer-encoding: chunked
vary: Accept-Encoding, Origin

Caching Headers

Cache-Control

Caching

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

Expires

Caching

Fri, 01 Jan 1990 00:00:00 GMT

cache-control: max-age=0, must-revalidate, no-cache, no-store, private
expires: Fri, 01 Jan 1990 00:00:00 GMT

Content Headers

Content-Type

Content

text/html; charset=utf-8

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

Server Headers

Server

cloudflare

X-Runtime

Server

0.192933

server: cloudflare
x-runtime: 0.192933

CORS Headers

No CORS headers found

Cookies Headers

Set-Cookie

Cookies

set-cookie: _stargate_session=84fd7d32626b2f3cc6aa65b0c2672c28; path=/; secure; HttpOnly; SameSite=None

Other Headers

Alt-Svc

Other

h3=":443"; ma=86400

Cf-Cache-Status

Other

DYNAMIC

Cf-Ray

Other

9f46ca886e0c52d6-IAD

Date

Other

Thu, 30 Apr 2026 13:11:14 GMT

Link

Other

URL /packs/css/client-bundle-6ac406f5.css

rel=preload as=style nopush

URL /packs/client-bundle.6ac406f53924f3a53eaa.css

rel=preload as=style nopush

Status

Other

200 OK

Via

Other

1.1 google

X-App-Name

Other

stargate-prod

X-Permitted-Cross-Domain-Policies

Other

none

X-Request-Id

Other

b6a6dd52-a5a4-4fff-9840-63905bbcab68

alt-svc: h3=":443"; ma=86400
cf-cache-status: DYNAMIC
cf-ray: 9f46ca886e0c52d6-IAD
date: Thu, 30 Apr 2026 13:11:14 GMT
link: </packs/css/client-bundle-6ac406f5.css>; rel=preload; as=style; nopush,</packs/client-bundle.6ac406f53924f3a53eaa.css>; rel=preload; as=style; nopush
status: 200 OK
via: 1.1 google
x-app-name: stargate-prod
x-permitted-cross-domain-policies: none
x-request-id: b6a6dd52-a5a4-4fff-9840-63905bbcab68

Recommendations

Enable compression (gzip/brotli) to improve performance