HTTP Headers Analysis for https://cards-dev.twitter.com

Detected Technologies from Headers

See all in URL Inspect 3

Cloudflare CDN

Envoy

Twitter

HTTP Security Headers

Status

Strict-Transport-Security

Present

max-age=631138519; includeSubdomains

Content-Security-Policy

Good

default-src; img-src; script-src; +7 more Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Good

SAMEORIGIN

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Missing

Not configured

Permissions-Policy

Missing

Not configured

Recommendations

• Increase HSTS max-age to at least 1 year and add includeSubDomains
• Strengthen CSP by removing 'unsafe-eval'
• 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-cache, no-store, max-age=0

cache-control: no-cache, no-store, max-age=0

Content Headers

Content-Type

Content

text/html;charset=utf-8

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

Server Headers

Server

cloudflare envoy

server: cloudflare envoy

CORS Headers

No CORS headers found

Cookies Headers

Set-Cookie

Cookies

set-cookie: guest_id_marketing=v1%3A177780719518723382; Max-Age=63072000; Expires=Tue, 02 May 2028 11:19:55 GMT; Path=/; Domain=.twitter.com; Secure; SameSite=None
guest_id_ads=v1%3A177780719518723382; Max-Age=63072000; Expires=Tue, 02 May 2028 11:19:55 GMT; Path=/; Domain=.twitter.com; Secure; SameSite=None
personalization_id="v1_JgxVMIUJa6B5WPXCsWxa4w=="; Max-Age=63072000; Expires=Tue, 02 May 2028 11:19:55 GMT; Path=/; Domain=.twitter.com; Secure; SameSite=None
guest_id=v1%3A177780719518723382; Max-Age=63072000; Expires=Tue, 02 May 2028 11:19:55 GMT; Path=/; Domain=.twitter.com; Secure; SameSite=None
csrf_id=ca2301c6223fa71aa325fd09ea18f813; Max-Age=21600; Expires=Sun, 03 May 2026 17:19:55 GMT; Path=/; Domain=.twitter.com; Secure
__cf_bm=6BCVQuNqS6GCniJ.vJA2FLwKfEhWWLSmGbOFetlY7AQ-1777807195.1595721-1.0.1.1-wh8q59ZXh6m.isU_kg5b34J0cGwWQt3awJHfWt2ekr717gf7clk58mgfiLf3eTkPlIzgqzJFmno7x19VA5tztI6IQ8KQwimdZJ1j3NvEVvbRu5CIqCf4uXUhFjP5x64Z; HttpOnly; Secure; Path=/; Domain=twitter.com; Expires=Sun, 03 May 2026 11:49:55 GMT

Other Headers

Cf-Cache-Status

Other

DYNAMIC

Cf-Ray

Other

9f5edf99b97f07b5-IAD

Date

Other

Sun, 03 May 2026 11:19:55 GMT

Origin-Cf-Ray

Other

9f5edf99b97f07b5-ATL

Perf

Other

7402827104

X-Response-Time

Other

9

X-Served-By

Other

t4_a

X-Transaction

Other

3da3a0f923d3b3d5

X-Transaction-Id

Other

3da3a0f923d3b3d5

cf-cache-status: DYNAMIC
cf-ray: 9f5edf99b97f07b5-IAD
date: Sun, 03 May 2026 11:19:55 GMT
origin-cf-ray: 9f5edf99b97f07b5-ATL
perf: 7402827104
x-response-time: 9
x-served-by: t4_a
x-transaction: 3da3a0f923d3b3d5
x-transaction-id: 3da3a0f923d3b3d5

Recommendations

Enable compression (gzip/brotli) to improve performance