HTTP Headers Analysis for https://panther.dev

Detected Technologies from Headers

See all in URL Inspect 3

Cloudflare CDN

Render

Express

HTTP Security Headers

Status

Strict-Transport-Security

Missing

Not configured

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

Missing

Not configured

Referrer-Policy

Missing

Not configured

Permissions-Policy

Missing

Not configured

Recommendations

• Add Strict-Transport-Security header with max-age of at least 1 year
• Add Content-Security-Policy header to prevent XSS attacks
• 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

Transfer-Encoding

Performance

chunked

Vary

Performance

Accept-Encoding

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

Caching Headers

Cache-Control

Caching

no-store, no-cache, must-revalidate, proxy-revalidate

Etag

Caching

W/"577-jYGpHTTN4sbEUeuXIDiqikpvdf4"

cache-control: no-store, no-cache, must-revalidate, proxy-revalidate
etag: W/"577-jYGpHTTN4sbEUeuXIDiqikpvdf4"

Content Headers

Content-Type

Content

text/html; charset=utf-8

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

Server Headers

Server

cloudflare

X-Powered-By

Server

Express

server: cloudflare
x-powered-by: Express

CORS Headers

Access-Control-Allow-Headers

Cors

Origin, X-Requested-With, Content-Type, Accept

Access-Control-Allow-Methods

Cors

GET, POST, OPTIONS, PUT, DELETE

access-control-allow-headers: Origin, X-Requested-With, Content-Type, Accept
access-control-allow-methods: GET, POST, OPTIONS, PUT, DELETE

Cookies Headers

No cookies headers found

Other Headers

Alt-Svc

Other

h3=":443"; ma=86400

Cf-Cache-Status

Other

DYNAMIC

Cf-Ray

Other

a36ddd29feef7077-IAD

Date

Other

Sun, 06 Sep 2026 13:36:40 GMT

Rndr-Id

Other

a43733c9-b232-4f0e

Surrogate-Control

Other

no-store

X-Render-Origin-Server

Other

Render

alt-svc: h3=":443"; ma=86400
cf-cache-status: DYNAMIC
cf-ray: a36ddd29feef7077-IAD
date: Sun, 06 Sep 2026 13:36:40 GMT
rndr-id: a43733c9-b232-4f0e
surrogate-control: no-store
x-render-origin-server: Render

Recommendations

Enable compression (gzip/brotli) to improve performance

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