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=fZFRS8MwFIXf9ytC3tsm3VZiWDvKhlCYIpv64FtM71ywSWZuOqe%2FXlYVJqKv%0A95zDufe7s%2FnRduQAAY13JeUpo%2FNqNENlu72s%2B7hza3jpASM52s6hHISS9sFJ%0Ar9CgdMoCyqjlpr5ayTxlch989Np39Czyf0IhQojGO0qaZUlPgZAwVUx1rkTC%0AdZEnE7EViVCMJaJoxYXKOUyKMSUNYg%2BNw6hcLGnO8iLhLBnzWzaRUyG5eKDk%0A%2Fvu6PGWU1N9lC%2B%2BwtxA2EA5Gw916VdJdjHuUWfZk4q5%2FTN%2FBtYDPqfY2U1oD%0AYnZajlYDIDmUh%2Bq3eZad6180r5WFZnnjO6PfSN11%2FnURQEUoaQw9UHLpg1Xx%0Ab1I85cPEtMl2sEqwynR12wZApFn12frzbdXoAw%3D%3D%0A 200 6 hops 2084 ms
Redirect chain
  1. 301 https://support.enterprise.github.com 267 ms
  2. 302 https://enterprise.githubsupport.com/ 238 ms
  3. 302 https://enterprise.githubsupport.com/hc 215 ms
  4. 302 https://enterprise.githubsupport.com/hc/en-us/restricted?return_to=https%3A%2F%2Fenterprise.githubsupport.com%2Fhc&locale=en-us 244 ms
  5. 302 https://github.zendesk.com/access?brand_id=400594&locale=en-us&return_to=https%3A%2F%2Fenterprise.githubsupport.com%2Fhc 219 ms
  6. 200 https://github.okta.com/app/zendesk/kxpia17hETAUWOCDZBZO/sso/saml?RelayState=https%3A%2F%2Fenterprise.githubsupport.com%2Fhc&brand_id=400594&SAMLRequest=fZFRS8MwFIXf9ytC3tsm3VZiWDvKhlCYIpv64FtM71ywSWZuOqe%2FXlYVJqKv%0A95zDufe7s%2FnRduQAAY13JeUpo%2FNqNENlu72s%2B7hza3jpASM52s6hHISS9sFJ%0Ar9CgdMoCyqjlpr5ayTxlch989Np39Czyf0IhQojGO0qaZUlPgZAwVUx1rkTC%0AdZEnE7EViVCMJaJoxYXKOUyKMSUNYg%2BNw6hcLGnO8iLhLBnzWzaRUyG5eKDk%0A%2Fvu6PGWU1N9lC%2B%2BwtxA2EA5Gw916VdJdjHuUWfZk4q5%2FTN%2FBtYDPqfY2U1oD%0AYnZajlYDIDmUh%2Bq3eZad6180r5WFZnnjO6PfSN11%2FnURQEUoaQw9UHLpg1Xx%0Ab1I85cPEtMl2sEqwynR12wZApFn12frzbdXoAw%3D%3D%0A 463 ms
Final response headers (24)
date Sat, 31 Oct 2026 04:58:19 GMT
content-type text/html;charset=utf-8
server nginx
vary Accept-Encoding
x-okta-request-id 075f964c8786de642d692e811f7d9e78
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=458DF945C1283583680E3143A6D8F169; Path=/; Secure; HttpOnly, t=""; Expires=Thu, 01 Jan 1970 00:00:10 GMT; Path=/, DT=DI101IVB5IwSZ2O8LcKBaXmLg;Version=1;Path=/;Max-Age=63072000;Secure;Expires=Mon, 30 Oct 2028 04:58:19 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-QK0cmSvKCVZr-TPj_xbmxA' 'self' 'report-sample' github.okta.com *.oktacdn.com; style-src 'unsafe-inline' 'nonce-QK0cmSvKCVZr-TPj_xbmxA' '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-QK0cmSvKCVZr-TPj_xbmxA' 'self' 'report-sample' github.okta.com *.oktacdn.com; style-src 'unsafe-inline' 'nonce-QK0cmSvKCVZr-TPj_xbmxA' '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 603
x-rate-limit-reset 1793422703
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