Location
United States
Country level only
Domain
cloudflare.com
Served through Cloudflare's network, which answers from the location nearest each visitor.
Still looking this up. This tab fills in as the answers arrive.
Network Every network on the internet has an autonomous system number (ASN). This is the one that announces this address.
AS13335Cloudflare
Cloudflare, Inc.
BGP prefixPrefix The block of addresses this IP is announced in to the rest of the internet. RPKI valid means the block's owner signed off on the network announcing it.
RPKI valid104.16.128.0/20
Seen by 3,443 peers
Latency Round trip for an HTTPS request from your browser to the site and back, including the server's reply time.
Live— ms
Measuring from your browser…
At a glance
Details
Network
- IPv4
- 104.16.132.229
- ASNThe autonomous system number of the network that announces this address.
- AS13335
- Operator
- Cloudflare, Inc.
- CDNFrom the provider's own published list of its address ranges.
- Cloudflare
- PrefixThe block of addresses announced over BGP that contains this address.
- 104.16.128.0/20
- RPKIWhether a signed record (ROA) authorizes this network to announce this prefix.
- Valid
- VisibilityHow many bgp.tools peers carry this announcement.
- 3,443 peers
- Type
- Content
- Registry
- ARIN
Location
Country level- Country
- United States
- Continent
- North America
Registration
RDAP- PopularityCloudflare Radar's ranking of domains by how often 1.1.1.1 users look them up.
- #3 worldwide
- Category
- Technology
- Registrar
- Cloudflare, Inc.
- Registered
- Feb 17, 200917 years ago
- Expires
- Feb 17, 2033in 6 years
- Updated
- Jan 9, 2024
- StatusRegistry flags on the domain, such as locks that stop unauthorized transfers or changes.
- Delete lockedTransfer lockedUpdate lockedDelete locked by registryTransfer locked by registryUpdate locked by registry
- DNSSECDNSSEC signs DNS answers so they can't be forged on the way to you.
- Signed
- Name servers
- ns3.cloudflare.comns4.cloudflare.comns5.cloudflare.comns6.cloudflare.comns7.cloudflare.com
- Registrant
- Redacted for privacy
Feb 17, 20092,321 days leftFeb 17, 2033
Route
Finding a probe near you…
Networks crossed
Each network is an autonomous system (AS). Your traffic is handed from one to the next where they connect, following
the routes BGP advertises.
- AS16509Anthropic, PBC
- AS13335Cloudflare
Tracing from a probe near you with Globalping. Hop locations that its round-trip times rule out are left off the map.
Protected from spoofing
Mail that fails its checks is rejected under cloudflare.com's DMARC policy, so forged mail doesn't reach inboxes.
- Receives mail
- Its own servers
- Mail servers
- mxa-canary.global.inbound.cf-emailsecurity.netmxb-canary.global.inbound.cf-emailsecurity.netmxa.global.inbound.cf-emailsecurity.net+1 more
- SPFLists the servers allowed to send mail for the domain. Receivers check it against the sending server.
- Rejects everything else7 of 10 DNS lookups · includes _spf.google.com, spf1.mcsv.net…
- DMARCTells receivers what to do with mail that fails SPF and DKIM: nothing (none), spam folder (quarantine) or reject.
- Rejectsends reports
- MTA-STSRequires other mail servers to use encrypted connections (TLS) when delivering to this domain.
- Published, not enforced
- TLS reportsAsks other mail servers to report failed encrypted deliveries (TLS-RPT).
- Requested
- BIMIA brand logo that some mail apps show next to authenticated mail from the domain.
- Logo published
DNS records
TypeNameValueTTL
Acloudflare.com104.16.132.2293 min
Acloudflare.com104.16.133.2293 min
AAAAcloudflare.com2606:4700::6810:84e51 min
AAAAcloudflare.com2606:4700::6810:85e51 min
NScloudflare.comns3.cloudflare.com22 hr
NScloudflare.comns4.cloudflare.com22 hr
NScloudflare.comns5.cloudflare.com22 hr
NScloudflare.comns6.cloudflare.com22 hr
NScloudflare.comns7.cloudflare.com22 hr
MXcloudflare.com5 mxa-canary.global.inbound.cf-emailsecurity.net7 min
MXcloudflare.com5 mxb-canary.global.inbound.cf-emailsecurity.net7 min
MXcloudflare.com10 mxa.global.inbound.cf-emailsecurity.net7 min
MXcloudflare.com10 mxb.global.inbound.cf-emailsecurity.net7 min
TXTcloudflare.com"MS=ms70274184"5 min
TXTcloudflare.com"_neqmkgaq1lq9it5s8qmetrhbnu121wb"5 min
TXTcloudflare.com"_wkjc0fot0d7qrvrdt78bxkj2e2o67d2"5 min
TXTcloudflare.com"ZOOM_verify_7LFBvOO9SIigypFG2xRlMA"5 min
TXTcloudflare.com"asv=894f6d1f9f83bcf44e4b1bc40bc1c4aa"5 min
TXTcloudflare.com"apple-domain-verification=DNnWJoArJobFJKhJ"5 min
TXTcloudflare.com"status-page-domain-verification=r14frwljwbxs"5 min
TXTcloudflare.com"jamf-site-verification=c-eUvHBbhgFxMulFSY-QJQ"5 min
TXTcloudflare.com"canva-site-verification=oOyaVnHC-OiFoR1BPvetNA"5 min
TXTcloudflare.com"docker-verification=c578e21c-34fb-4474-9b90-d55ee4cba10c"5 min
TXTcloudflare.com"miro-verification=bdd7dfa0a49adfb43ad6ddfaf797633246c07356"5 min
TXTcloudflare.com"facebook-domain-verification=h9mm6zopj6p2po54woa16m5bskm6oo"5 min
TXTcloudflare.com"databank-domain-verification-hkehd2=fzgu4kmbZwMoW99zENgO4u8NL"5 min
TXTcloudflare.com"onetrust-domain-verification=bd5cd08a1e9644799fdb98ed7d60c9cb"5 min
TXTcloudflare.com"uber-domain-verification=58086039-150a-42a4-a4be-b4032921aa0f"5 min
TXTcloudflare.com"logmein-verification-code=b3433c86-3823-4808-8a7e-58042469f654"5 min
TXTcloudflare.com"creatopy-domain-verification=97d2ca50-9b6f-4a21-9bdb-fbb630e4cec7"5 min
TXTcloudflare.com"google-site-verification=C7thfNeXVahkVhniiqTI1iSVnElKR_kBBtnEHkeGDlo"5 min
TXTcloudflare.com"google-site-verification=ZdlQZLBBAPkxeFTCM1rpiB_ibtGff_JF5KllNKwDR9I"5 min
TXTcloudflare.com"liveramp-site-verification=EhH1MqgwbndTWl1AN64hOTKz7hc1s80yUpchLbgpfY0"5 min
TXTcloudflare.com"stripe-verification=5096d01ff2cf194285dd51cae18f24fa9c26dc928cebac3636d462b4c6925623"5 min
TXTcloudflare.com"stripe-verification=bf1a94e6b16ace2502a4a7fff574a25c8a45291054960c883c59be39d1788db9"5 min
TXTcloudflare.com"drift-domain-verification=f037808a26ae8b25bc13b1f1f2b4c3e0f78c03e67f24cefdd4ec520efa8e719f"5 min
TXTcloudflare.com"cisco-ci-domain-verification=27e926884619804ef987ae4aa1c4168f6b152ada84f4c8bfc74eb2bd2912ad72"5 min
TXTcloudflare.com"atlassian-domain-verification=WxxKyN9aLnjEsoOjUYI6T0bb5vcqmKzaIkC9Rx2QkNb751G3LL/cus8/ZDOgh8xB"5 min
TXTcloudflare.com"_saml-domain-challenge.2dc00405-79cd-457b-b288-a119c6f0c7b7.71996d53-d178-4ba9-bef4-7f7e46edab74.cloudflare.com=1c8736fd-84b2-4197-985f-3fb2852f2457"5 min
TXTcloudflare.com"DirectFedAuthUrl=https://cloudflare-security.cloudflareaccess.com/cdn-cgi/access/sso/saml/dba6756ad312fc13c45f705cf7f5e87f4d658be016c41f950329aa4085b3abc1"5 min
TXTcloudflare.com"DirectFedAuthUrl=https://cloudflare-security.cloudflareaccess.com/cdn-cgi/access/sso/saml/ebec933773c69c93420d13e6776adb8c4a190f6281f9d132bcebd7dcb0967bdd"5 min
TXTcloudflare.com"v=spf1 ip4:199.15.212.0/22 ip4:173.245.48.0/20 include:_spf.google.com include:spf1.mcsv.net include:spf.mandrillapp.com include:mail.zendesk.com include:stspg-customer.com include:_spf.salesforce.com -all"5 min
TXT_dmarc.cloudflare.com"v=DMARC1; p=reject; sp=reject; adkim=r; aspf=r; pct=100; rua=mailto:a1c47f179bc04efd8ee4dcd4d85dfc65@dmarc-reports.cloudflare.net,mailto:rua@cloudflare.com"5 min
CAAcloudflare.com0 iodef "mailto:tls-abuse@cloudflare.com"5 min
CAAcloudflare.com0 issue "comodoca.com"5 min
CAAcloudflare.com0 issue "digicert.com; cansignhttpexchanges=yes"5 min
CAAcloudflare.com0 issue "letsencrypt.org"5 min
CAAcloudflare.com0 issue "pki.goog; cansignhttpexchanges=yes"5 min
CAAcloudflare.com0 issue "ssl.com"5 min
CAAcloudflare.com0 issuewild "comodoca.com"5 min
CAAcloudflare.com0 issuewild "digicert.com; cansignhttpexchanges=yes"5 min
CAAcloudflare.com0 issuewild "letsencrypt.org"5 min
CAAcloudflare.com0 issuewild "pki.goog; cansignhttpexchanges=yes"5 min
CAAcloudflare.com0 issuewild "ssl.com"5 min
HTTPScloudflare.com1 . alpn=h3,h2 ipv4hint=104.16.132.229,104.16.133.229 ipv6hint=2606:4700::6810:84e5,2606:4700::6810:85e55 min
DScloudflare.com2371 13 2 32996839a6d808afe3eb4a795a0e6a7a39a76fc52ff228b22b76f6d63826f2b91 day
HTTPS
Certificate
Valid- Issuer
- Let's Encrypt
- Issuing CA
- YE2
- Covers
- *.cloudflare.com, cloudflare.com
- Also validOther unexpired certificates for this name, found in Certificate Transparency logs.
- 11 more certificates
Oct 11, 202690 days leftJan 9, 2027
From Certificate Transparency logs, via Cert Spotter.
Security
A+- HSTSStrict-Transport-Security makes browsers refuse plain HTTP to this site. Preloaded sites are HTTPS-only even on a first visit.
- 1 year · with subdomainsPreloaded in browsers
- HTTP → HTTPSWhether the plain http:// address redirects visitors to the secure one.
- Redirects
- HTTP/3The newest HTTP, over QUIC. Announced in the alt-svc header or the domain's HTTPS DNS record.
- Available
- Encrypted helloEncrypted Client Hello (ECH) hides which site you're visiting from anyone watching the connection.
- Not published
- CAADNS records naming the only certificate authorities allowed to issue certificates for the domain.
- Sectigo, DigiCert, Let's Encrypt, Google Trust Services, SSL.com
- security.txtA standard file (RFC 9116) telling security researchers how to report vulnerabilities.
- https://hackerone.com/cloudflare
Security headers 7 of 7
- HSTSpresent
- CSPpresent
- Framingpresent
- No sniffingpresent
- Referrerpresent
- Permissionspresent
- Isolationpresent
Response
200 OK40 ms from CMH · 1.3 MBDNS lookup1 ms
301 cloudflare.com2 ms
200 www.cloudflare.com40 ms
DNSConnect (TCP + TLS)Waiting for the replyFrom Cloudflare's CMH data center
Website
Page
Cloudflare: Build for the agent era
Welcome to Cloudflare - Powering the next generation of applications
- Language
- English
- Theme color
- #ff4801
- Generator
- Astro v6.3.7
Built with
- CloudFrom the provider's published address ranges.
- Cloudflare
- CDN
- Cloudflarecf-ray header
- Framework
- Astropage markup
Tech stack
Built with Each entry says what gave it away: a response header, a cookie's name, an asset's path or file name, or markup the tool leaves in the page. Versions are checked against endoflife.date's support schedules and, for JavaScript packages, OSV's vulnerability database, which carries GitHub's security advisories.
CDN & edge
- Cloudflare
cf-ray header
Framework
- Astro6.3.7
generator tag “Astro v6.3.7”
Styling
- Tailwind CSS
200 Tailwind CSS class names
Components & icons
- shadcn/ui
data-slot attributes
Bot protection
- Cloudflare Bot Management
__cf_bm cookie
How it's made
- RenderingPrerendered pages are built ahead of time and served as files. Pages rendered on each request are built by server code for every visitor. Pages drawn in the browser arrive nearly empty and depend on JavaScript, which most AI crawlers don't run. Islands are interactive parts in otherwise static HTML.
- Static HTML with islands11 interactive islands in otherwise static HTML
- IslandsAstro islands: components that load their JavaScript separately, each at the moment its client directive says.
- 5 when idle6 when scrolled into view
- Edge cacheWhether a CDN or proxy answered heade.rs's request from its cache, and how long ago that copy was made (the Age header).
- Served from cacheCloudflare · made 7 s ago
- Cache-Control
- max-age=10
- HTML
- Over 1 MB
- Data for scriptsData the server writes into the HTML so JavaScript can pick up where the server left off (hydration). Browsers download and parse all of it before the page responds, so large payloads slow pages down, even when the page looks ready.
- Astro island props 92.7 KB · 9% of the HTML
- Scripts
- 3 files · 18 inlineall from this site · 2 modules
Code from other sites Scripts a page loads from another domain run with the same power as its own code: they can read what visitors type and change the page. heade.rs checks what the HTML loads, not what tag managers add once they run.
The HTML loads no scripts from other sites.
Response headers
- accept-ranges
- bytes
- age
- 7
- cache-control
- max-age=10
- cf-cache-status
- HIT
- cf-ray
- a4979360bfa73f27-CMH
- connection
- close
- content-length
- 1334309
- content-security-policy
default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://static.cloudflareinsights.com https://static-staging.cloudflareinsights.com https://challenges.cloudflare.com https://*.onetrust.com https://cdn.cookielaw.org https… Show all
default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://static.cloudflareinsights.com https://static-staging.cloudflareinsights.com https://challenges.cloudflare.com https://*.onetrust.com https://cdn.cookielaw.org https://ot.www.cloudflare.com https://www.googletagmanager.com https://tagmanager.google.com https://www.googleadservices.com https://googleads.g.doubleclick.net https://adservice.google.com https://cdn.bizible.com https://js.adsrvr.org https://*.marketo.net https://platform.twitter.com https://static.ads-twitter.com https://scripts.demandbase.com https://tag.demandbase.com https://*.6sc.co https://*.qualified.com https://snap.licdn.com https://bat.bing.com; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; font-src 'self' data:; connect-src 'self' https://*.googletagmanager.com https://*.google-analytics.com https://*.google.com https://*.doubleclick.net https://www.googleadservices.com https://translate.googleapis.com https://cdn.bizible.com https://js.adsrvr.org https://*.marketo.net https://ads-twitter.com https://analytics.twitter.com https://*.twimg.com https://api.demandbase.com https://scripts.demandbase.com https://tag.demandbase.com https://tag-logger.demandbase.com https://api.company-target.com https://*.6sc.co https://epsilon.6sense.com https://*.qualified.com https://*.ads.linkedin.com https://www.linkedin.com https://bat.bing.com https: wss://*.qualified.com wss://*.registrar.cloudflare.com; frame-src https://*.adsrvr.org https://*.cloudflare.com https://*.videodelivery.net https://*.cloudflarestream.com https://www.googletagmanager.com https://*.qualified.com https://td.doubleclick.net https://bid.g.doubleclick.net https://9309168.fls.doubleclick.net https://9973066.fls.doubleclick.net https://s.company-target.com; object-src 'none'; base-uri 'self'; form-action 'self'; frame-ancestors 'none'; worker-src 'self' blob:; child-src 'self' blob:; upgrade-insecure-requests- content-type
- text/html; charset=utf-8
- cross-origin-opener-policy
- unsafe-none
- cross-origin-resource-policy
- cross-origin
- date
- Mon, 12 Oct 2026 16:45:34 GMT
- link
<https://www.cloudflare.com/.well-known/api-catalog>; rel="api-catalog", <https://www.cloudflare.com/.well-known/agents.json>; rel="service-desc", <https://www.cloudflare.com/.well-known/webmcp.json>; rel="service-desc", <https://www.cloudf… Show all
<https://www.cloudflare.com/.well-known/api-catalog>; rel="api-catalog", <https://www.cloudflare.com/.well-known/agents.json>; rel="service-desc", <https://www.cloudflare.com/.well-known/webmcp.json>; rel="service-desc", <https://www.cloudflare.com/openapi.json>; rel="service-desc", <https://www.cloudflare.com/llms.txt>; rel="service-doc", <https://www.cloudflare.com/sitemap.xml>; rel="sitemap", </fonts/Kunst%20Grotesk%20Regular.woff2>; rel=preload; as=font; type="font/woff2"; crossorigin, </fonts/Kunst%20Grotesk%20Medium.woff2>; rel=preload; as=font; type="font/woff2"; crossorigin, <https://ot.www.cloudflare.com>; rel=preconnect; crossorigin, <https://imagedelivery.net>; rel=preconnect; crossorigin, </static/hero-poster.avif>; rel=preload; as=image; type="image/avif"; fetchpriority=high- nel
- {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
- permissions-policy
- geolocation=(), camera=(), microphone=()
- referrer-policy
- strict-origin-when-cross-origin
- report-to
{"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=SF%2FJEZyail6EWBRS5nKLBg7Kb0Ert%2FnIxULzkinXWeGXWyeYFUNzRnfseJie2%2FAXo9RHhukuHgk4tpfT9tGu0Okma%2BxlP%2FSfzMrlkGbmF%2BUe5MD2W8DBU7C1l1Dgz45E8ur… Show all
{"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=SF%2FJEZyail6EWBRS5nKLBg7Kb0Ert%2FnIxULzkinXWeGXWyeYFUNzRnfseJie2%2FAXo9RHhukuHgk4tpfT9tGu0Okma%2BxlP%2FSfzMrlkGbmF%2BUe5MD2W8DBU7C1l1Dgz45E8ur2v2pjuHlE9%2BkMCPYx4w%3D%3D"}]}- server
- cloudflare
- set-cookie
__cf_bm=JaNulWeHwmxWPAF9zz63K9WN36lzuwref9xr5ewxwyU-1791823534.198971-1.0.1.1-zkZMZpZIHWOGPHDw3guBVfHTWOG49hHeCDSwVrcOckIw_FWq.IE5qhIBrFXxrG.REN3QcnV9nkJdBx3vnno8SrR4xYRzx7.g.3FvS0vyMtM06rmqdPTBi4mNJ9X1pnjPQxnOwAJbr4mcnMhXu1st1A; HttpOnly; … Show all
__cf_bm=JaNulWeHwmxWPAF9zz63K9WN36lzuwref9xr5ewxwyU-1791823534.198971-1.0.1.1-zkZMZpZIHWOGPHDw3guBVfHTWOG49hHeCDSwVrcOckIw_FWq.IE5qhIBrFXxrG.REN3QcnV9nkJdBx3vnno8SrR4xYRzx7.g.3FvS0vyMtM06rmqdPTBi4mNJ9X1pnjPQxnOwAJbr4mcnMhXu1st1A; HttpOnly; SameSite=None; Secure; Path=/; Domain=www.cloudflare.com; Expires=Mon, 12 Oct 2026 17:15:34 GMT- set-cookie
- kndctr_8AD56F28618A50850A495FB6_AdobeOrg_identity=CiYyODE2MDczNzU3MjY0NjUyNzkzOTEwMjg4MDA5ODMxNDU2MzM5M1IOCIuxhYiTNCoDVkE2MALwAYuxhYiTNA==; Expires=Thu, 11 Nov 2027 16:45:34 GMT; Path=/; Secure; SameSite=Lax
- set-cookie
cfz_adobe={"MsVJ_ecid":{"v":"CiYyODE2MDczNzU3MjY0NjUyNzkzOTEwMjg4MDA5ODMxNDU2MzM5M1IOCIuxhYiTNCoDVkE2MALwAYuxhYiTNA==","e":1825951534231}}; Expires=Thu Nov 11 2027 16:45:34 GMT+0000 (Coordinated Universal Time); HttpOnly; SameSite=Lax; Path… Show all
cfz_adobe={"MsVJ_ecid":{"v":"CiYyODE2MDczNzU3MjY0NjUyNzkzOTEwMjg4MDA5ODMxNDU2MzM5M1IOCIuxhYiTNCoDVkE2MALwAYuxhYiTNA==","e":1825951534231}}; Expires=Thu Nov 11 2027 16:45:34 GMT+0000 (Coordinated Universal Time); HttpOnly; SameSite=Lax; Path=/; Secure- set-cookie
- cfz_google-analytics_v4={"nzcr_ga4":{"v":"7b906eec-b354-4c33-8874-a8141b81863e","e":1826037934206}}; Expires=Fri Nov 12 2027 16:45:34 GMT+0000 (Coordinated Universal Time); HttpOnly; SameSite=Lax; Path=/; Secure
- set-cookie
- _ga=GA1.1.7b906eec-b354-4c33-8874-a8141b81863e; Expires=Fri, 12 Nov 2027 16:45:34 GMT; Path=/
- strict-transport-security
- max-age=31536000; includeSubDomains
- vary
- accept-encoding
- x-content-type-options
- nosniff
- x-frame-options
- SAMEORIGIN
- x-rm
- GW
- x-served-by
- marketing-site
- x-xss-protection
- 1; mode=block
AI & agents
Open to AI crawlers
robots.txt lets every AI crawler in. Agents that ask for Markdown get 2.9 KB instead of more than 1.0 MB of HTML, and it offers an MCP server and 16 agent skills.
Crawlers
Allows allTrainingSearchOn request
They visit a page when someone asks an assistant about it. ChatGPT's, Perplexity's, Meta's and Amazon's treat robots.txt as advisory;
Anthropic's and Mistral's follow it.
OpenAIGPTBotallowedOAI-SearchBotallowedChatGPT-Userallowed
AnthropicClaudeBotallowedClaude-SearchBotallowedClaude-Userallowed
GoogleGoogle-ExtendedallowedGooglebotallowed—
Microsoft—bingbotallowed—
AppleApplebot-ExtendedallowedApplebotallowed—
Perplexity—PerplexityBotallowedPerplexity-Userallowed
MetaMeta-ExternalAgentallowedMeta-WebIndexerallowedMeta-ExternalFetcherallowed
AmazonAmazonbotallowedAmzn-SearchBotallowedAmzn-Userallowed
MistralMistralAI-TrainingallowedMistralAI-IndexallowedMistralAI-Userallowed
OthersCCBotallowedBytespiderallowedDuckAssistBotallowed
- Can cite itThe AI products that can use the site in their answers: each answers from one crawler (OAI-SearchBot for ChatGPT search, Googlebot for AI Overviews, bingbot for Copilot), and robots directives on the front page, like noindex, nosnippet and noarchive, keep some out.
- ChatGPT searchClaudePerplexityAI OverviewsGeminiCopilotMeta AISiri
Content signals
Lines in robots.txt (Cloudflare's Content Signals Policy) saying whether pages may be used for search, as input to AI answers (ai-input) and for AI
training. No major AI company has said it follows them.
ai-train=yessearch=yesai-input=yes
It's on Cloudflare, which can also block AI crawlers at its edge whatever robots.txt says.
Reading
- Without JavaScriptText on the front page before any scripts run: what GPTBot, ClaudeBot, PerplexityBot and most agents read. Google, Bing and Apple's crawlers run scripts.
- 290 words
- MarkdownAgents like Claude Code, Cursor and OpenCode ask for Markdown in their Accept header. It's the page without its markup, so it costs them far fewer tokens.
- On request2.9 KB, over 350× smaller
- llms.txtA Markdown file listing a site's key pages for AI tools. Coding agents read it; search crawlers mostly don't.
- 90 links in 13 sectionsllms-full.txt too (164.3 KB)
- Structured dataschema.org JSON-LD in the page: facts about the site in a form machines read directly.
- Organization, WebSite, WebPage
Tools Ways an AI agent can do things on the site, not just read it: an MCP server that apps like Claude, ChatGPT and Cursor connect to, an API catalog, packaged agent skills, a shopping profile (UCP), or tools the page offers AI in the browser (WebMCP). heade.rs looks in the official MCP Registry and the files the site publishes under /.well-known/.
- MCP serverModel Context Protocol: a server that AI apps like Claude, ChatGPT and Cursor connect to so they can use a service's tools. Servers in the official MCP Registry are published under the domain's own name, which the registry checked. A server card, which the site's AI Catalog points to, says which MCP revisions the server speaks; 2026-07-28 is the first stateless one.
- com.cloudflare.mcp/mcpdocs.mcp.cloudflare.com +2 Registry Old card path
- APIsAn API catalog (RFC 9727, at /.well-known/api-catalog) lists a site's APIs and links to their machine-readable descriptions, usually OpenAPI.
- OpenAPI description linked
- Agent skillsInstructions and scripts packaged for AI agents (SKILL.md), listed in an index at /.well-known/agent-skills/index.json or in the site's AI Catalog. Tools like Vercel's skills CLI install them.
- 16 skillsDiscovery v0.2.0
- In-page toolsWebMCP: tools a page registers so AI agents in the browser, like ChatGPT's, can call them instead of clicking through the page. Only tools declared in the HTML or inline scripts can be seen here.
- Registers tools