HTTP Headers Analysis for https://www.anthropic.com

Detected Technologies from Headers

See all in URL Inspect 23

AWS CloudFront

YouTube

Amazon S3

Cloudflare CDN

Cloudflare CDNJS

Embedly Active incidents

Facebook

Finsweet

Google Analytics

Google Fonts

Google Maps

Google Static File Front End

Google Tag Manager

HubSpot

HubSpot Forms

Intellimize (Webflow)

Iterable

jsDelivr

Sanity

Swoogo

Vimeo

Webflow

Google Cloud

HTTP Security Headers

Status

Strict-Transport-Security

Present

max-age=3600

Content-Security-Policy

Good

default-src; script-src; style-src; +9 more 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
• Strengthen CSP by removing 'unsafe-eval'
• 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

Transfer-Encoding

Performance

chunked

Vary

Performance

accept-encoding

connection: close
transfer-encoding: chunked
vary: accept-encoding

Caching Headers

Age

Caching

310437

Last-Modified

Caching

Thu, 16 Apr 2026 14:26:10 GMT

age: 310437
last-modified: Thu, 16 Apr 2026 14:26:10 GMT

Content Headers

Content-Type

Content

text/html; charset=utf-8

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

Server Headers

Server

cloudflare

server: cloudflare

CORS Headers

No CORS headers found

Cookies Headers

Set-Cookie

Cookies

set-cookie: _cfuvid=L0Mf9QwSbrdoNNPZrXv.EDGgUaT69US.jvv4EigWtgs-1776660007.185468-1.0.1.1-HMRB1OTnU7S2S_THH_vIAMPnkhClLS0utJtZ2s0sLxA; HttpOnly; SameSite=None; Secure; Path=/; Domain=website.anthropic.com
__cf_bm=6dnq2D7GV_GxN2bsjx_1lA.xbSPuDm97nycMOFlmbHY-1776660007-1.0.1.1-_1CagfcGmFWXSzTI6ggVXm6xlUORwS1Z6bxoZpCJjroAvEL3HQVBSnVhQY.5_jvzxT0LPJ5GXIzbzPjM2iKktzraaOVg.l_UdCYc_lQ503A; path=/; expires=Mon, 20-Apr-26 05:10:07 GMT; domain=.anthropic.com; HttpOnly; Secure; SameSite=None
_cfuvid=lFU.ndhVUP4lpD4IZOotCUjofiyCANLqqNHqs3TN1IA-1776660007239-0.0.1.1-604800000; path=/; domain=.anthropic.com; HttpOnly; Secure; SameSite=None

Other Headers

Alt-Svc

Other

h3=":443"; ma=86400

Cf-Cache-Status

Other

DYNAMIC

Cf-Ray

Other

9ef17814b87cc5f1-IAD

Date

Other

Mon, 20 Apr 2026 04:40:07 GMT

Surrogate-Control

Other

max-age=2147483647

Surrogate-Key

Other

website.anthropic.com 67ce28cfec624e2b733f8a52 pageId:67f55a9666b2ae2332f5f893

X-Lambda-Id

Other

d9312dbd-2e1a-45a6-a046-33a05e624d7f

X-Wf-Page-Id

Other

Z/ValmayriMy9fiT

X-Wf-Region

Other

us-east-1

alt-svc: h3=":443"; ma=86400
cf-cache-status: DYNAMIC
cf-ray: 9ef17814b87cc5f1-IAD
date: Mon, 20 Apr 2026 04:40:07 GMT
surrogate-control: max-age=2147483647
surrogate-key: website.anthropic.com 67ce28cfec624e2b733f8a52 pageId:67f55a9666b2ae2332f5f893
x-lambda-id: d9312dbd-2e1a-45a6-a046-33a05e624d7f
x-wf-page-id: Z/ValmayriMy9fiT
x-wf-region: us-east-1

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching