host.tools

HTTP headers

HTTP /api/v1/http/headers

Capture every response header, follow redirects, time each hop.

Try: https://host.com https://checkhost.com https://hostinfo.com https://crypt.tools
Related: DNS lookup (dig) DNS propagation Domain WHOIS SSL certificate inspector HTTP headers Security headers grader MX lookup SPF tester DMARC tester
https://github.okta.com/app/zendesk/kxpia17hETAUWOCDZBZO/sso/saml?RelayState=https%3A%2F%2Fenterprise.githubsupport.com%2Fhc&brand_id=400594&SAMLRequest=fZFLT8MwEITv%2FArL9zychEZYTaqoFVKkglALHLi5zoZa%2BFG8Tin8etRApSIE%0A150Zze6309nBaLIHj8rZirI4pbP6YorC6B1vhrC1K3gdAAM5GG2Rj0JFB2%2B5%0AE6iQW2EAeZB83dwseRanfOddcNJpehb5PyEQwQflLCXtoqLHgI%2ByPk8L6Fkk%0AIZ9ERcH6SOSbPipZCVlRlGU5YZS0iAO0FoOwoaJZmk2i9Cpil%2FdZzosJZ%2ByJ%0AksfTdVmcUtKcyubO4mDAr8HvlYSH1bKi2xB2yJPkWYXtsIk%2FwHaAL7F0JhFS%0AAmJyXI7WIyA%2Blvv6t3manOvfNG%2BFgXZx57SS76TR2r3NPYgAFQ1%2BAEqunTci%0A%2FE2KxWycqC7qRysHI5Ruus4DIk3qr9afb6svPgE%3D%0A 200 6 hops 2419 ms
Redirect chain
  1. 301 https://support.enterprise.github.com 270 ms
  2. 302 https://enterprise.githubsupport.com/ 572 ms
  3. 302 https://enterprise.githubsupport.com/hc 244 ms
  4. 302 https://enterprise.githubsupport.com/hc/en-us/restricted?return_to=https%3A%2F%2Fenterprise.githubsupport.com%2Fhc&locale=en-us 223 ms
  5. 302 https://github.zendesk.com/access?brand_id=400594&locale=en-us&return_to=https%3A%2F%2Fenterprise.githubsupport.com%2Fhc 233 ms
  6. 200 https://github.okta.com/app/zendesk/kxpia17hETAUWOCDZBZO/sso/saml?RelayState=https%3A%2F%2Fenterprise.githubsupport.com%2Fhc&brand_id=400594&SAMLRequest=fZFLT8MwEITv%2FArL9zychEZYTaqoFVKkglALHLi5zoZa%2BFG8Tin8etRApSIE%0A150Zze6309nBaLIHj8rZirI4pbP6YorC6B1vhrC1K3gdAAM5GG2Rj0JFB2%2B5%0AE6iQW2EAeZB83dwseRanfOddcNJpehb5PyEQwQflLCXtoqLHgI%2ByPk8L6Fkk%0AIZ9ERcH6SOSbPipZCVlRlGU5YZS0iAO0FoOwoaJZmk2i9Cpil%2FdZzosJZ%2ByJ%0AksfTdVmcUtKcyubO4mDAr8HvlYSH1bKi2xB2yJPkWYXtsIk%2FwHaAL7F0JhFS%0AAmJyXI7WIyA%2Blvv6t3manOvfNG%2BFgXZx57SS76TR2r3NPYgAFQ1%2BAEqunTci%0A%2FE2KxWycqC7qRysHI5Ruus4DIk3qr9afb6svPgE%3D%0A 434 ms
Final response headers (24)
date Tue, 15 Sep 2026 23:46:12 GMT
content-type text/html;charset=utf-8
server nginx
vary Accept-Encoding
x-okta-request-id 22b41ccbfeef7c32d34a4a91e1b9b306
accept-ch Sec-CH-UA-Platform-Version
x-xss-protection 0
p3p CP="HONK"
set-cookie xids="";Version=1;Path=/;Max-Age=0, sid="";Version=1;Path=/;Max-Age=0, autolaunch_triggered=""; Expires=Thu, 01 Jan 1970 00:00:10 GMT; Path=/, activate_ca_modal_triggered=""; Expires=Thu, 01 Jan 1970 00:00:10 GMT; Path=/, JSESSIONID=97D0937A3D4F8165912C556DBF4C7A35; Path=/; Secure; HttpOnly, t=""; Expires=Thu, 01 Jan 1970 00:00:10 GMT; Path=/, DT=DI1xJoXo3VMSQKCaNV696LHRw;Version=1;Path=/;Max-Age=63072000;Secure;Expires=Thu, 14 Sep 2028 23:46:12 GMT;HttpOnly
content-security-policy-report-only default-src 'self' github.okta.com *.oktacdn.com; connect-src 'self' github.okta.com github-admin.okta.com *.oktacdn.com *.mixpanel.com *.mapbox.com github.kerberos.okta.com github.mtls.okta.com *.authenticatorlocalprod.com:8769 http://localhost:8769 http://127.0.0.1:8769 *.authenticatorlocalprod.com:65111 http://localhost:65111 http://127.0.0.1:65111 *.authenticatorlocalprod.com:65121 http://localhost:65121 http://127.0.0.1:65121 *.authenticatorlocalprod.com:65131 http://localhost:65131 http://127.0.0.1:65131 *.authenticatorlocalprod.com:65141 http://localhost:65141 http://127.0.0.1:65141 *.authenticatorlocalprod.com:65151 http://localhost:65151 http://127.0.0.1:65151 https://oinmanager.okta.com data: *.ingest.sentry.io; script-src 'unsafe-inline' 'nonce-zMR5YQNXEX2rjlFshLINGg' 'self' 'report-sample' github.okta.com *.oktacdn.com; style-src 'unsafe-inline' 'nonce-zMR5YQNXEX2rjlFshLINGg' 'self' 'report-sample' github.okta.com *.oktacdn.com; frame-src 'self' github.okta.com github-admin.okta.com login.okta.com *.vidyard.com com-okta-authenticator: api-9dcf9b83.duosecurity.com; img-src 'self' github.okta.com *.oktacdn.com *.tiles.mapbox.com *.mapbox.com *.vidyard.com data: blob:; font-src 'self' github.okta.com data: *.oktacdn.com fonts.gstatic.com; frame-ancestors 'self'
content-security-policy default-src 'self' github.okta.com *.oktacdn.com; connect-src 'self' github.okta.com github-admin.okta.com *.oktacdn.com *.mixpanel.com *.mapbox.com github.kerberos.okta.com github.mtls.okta.com *.authenticatorlocalprod.com:8769 http://localhost:8769 http://127.0.0.1:8769 *.authenticatorlocalprod.com:65111 http://localhost:65111 http://127.0.0.1:65111 *.authenticatorlocalprod.com:65121 http://localhost:65121 http://127.0.0.1:65121 *.authenticatorlocalprod.com:65131 http://localhost:65131 http://127.0.0.1:65131 *.authenticatorlocalprod.com:65141 http://localhost:65141 http://127.0.0.1:65141 *.authenticatorlocalprod.com:65151 http://localhost:65151 http://127.0.0.1:65151 https://oinmanager.okta.com data: *.ingest.sentry.io; script-src 'unsafe-inline' 'nonce-zMR5YQNXEX2rjlFshLINGg' 'self' 'report-sample' github.okta.com *.oktacdn.com; style-src 'unsafe-inline' 'nonce-zMR5YQNXEX2rjlFshLINGg' 'self' 'report-sample' github.okta.com *.oktacdn.com; frame-src 'self' github.okta.com github-admin.okta.com login.okta.com *.vidyard.com com-okta-authenticator: api-9dcf9b83.duosecurity.com; img-src 'self' github.okta.com *.oktacdn.com *.tiles.mapbox.com *.mapbox.com *.vidyard.com data: blob:; font-src 'self' github.okta.com data: *.oktacdn.com fonts.gstatic.com
x-rate-limit-limit 750
x-rate-limit-remaining 679
x-rate-limit-reset 1789515993
referrer-policy strict-origin-when-cross-origin
cache-control no-cache, no-store
pragma no-cache
expires 0
x-content-type-options nosniff
x-ua-compatible IE=edge
content-language en
strict-transport-security max-age=315360000; includeSubDomains
x-robots-tag noindex,nofollow
content-encoding gzip
Tech stack
Nginx
How to use HTTP headers
  1. 1
    Paste your input

    Enter the value at the top — domain, IP, URL, email, ASN, hash, whatever fits this tool. The smart input auto-detects type.

  2. 2
    Click "Inspect"

    host.tools issues real probes (DNS, HTTP, TCP, TLS, WHOIS where applicable) and renders the result in milliseconds.

  3. 3
    Open the API tab

    Every web tool has a sibling /api/v1/http/headers JSON endpoint with the same payload. One copy-as-curl click and you're scripting it.

Why this matters

Headers are how the modern web declares its security posture. Auditing them is the highest-ROI thing you can do this week.

API equivalent
/api/v1/http/headers?q=support.enterprise.github.com 
curl -s '/api/v1/http/headers?q=support.enterprise.github.com'
Embed this tool
<iframe src="/http/headers?q={INPUT}&embed=1"
  width="100%" height="600" frameborder="0"></iframe>

Drop into any HTML page. The embed=1 flag hides nav and footer.

FAQ · HTTP headers

Common questions

Is HTTP headers free?
Yes — every tool is free on the web with a 200/hour rate limit per IP. The matching API endpoint /api/v1/http/headers is free up to 100 requests/hour, no key required.
Where does the data come from?
Real-time probes against authoritative sources (DNS root, RIRs, registries, the target server itself), plus partner data feeds from hostinfo.com (GeoIP/ASN) and hostcheck.com (reputation).
How fresh are the results?
Live by default. Cached for 5 minutes to make repeat queries instant; pass ?nocache=1 for a forced refresh.
Can I run this from the command line?
Yes — every tool ships with a copy-as-curl. There's also an official CLI: host.tools http headers YOUR_INPUT.
Can I monitor results over time?
Pro tier lets you schedule any tool to run every 1/5/15/60 min and alert on diff. See monitors.
host.tools Pro

Run HTTP headers on a schedule. Get pinged when it changes.

Pro gets you bulk lookups, monitors, webhook alerts, history, exports and 10,000 API calls/day. $19/mo.

See pricing Tour monitors
  • ✓Schedule any tool — every 1, 5, 15, 60 min
  • ✓Diff against last run, alert on change
  • ✓Webhook + email + Slack + PagerDuty + OpsGenie
  • ✓Bulk CSV upload, 1,000 inputs per job
  • ✓Export results as CSV / NDJSON / Excel
  • ✓90-day history, comparison view