HTTP headers
HTTP /api/v1/http/headersCapture every response header, follow redirects, time each hop.
https://github.okta.com/app/zendesk/kxpia17hETAUWOCDZBZO/sso/saml?RelayState=https%3A%2F%2Fenterprise.githubsupport.com%2Fhc%2Fsitemap.xml&brand_id=400594&SAMLRequest=fZFPS8NAEMXv%2FRTL3pNsQpLWpUkJLUKgirTqwdtmM9rF%2FVN3NrX66aVRoSJ6%0Anfceb%2BY388XRaHIAj8rZiqYxo4t6Mkdh9J43Q9jZDbwMgIEcjbbIR6Gig7fc%0ACVTIrTCAPEi%2Bba7WPIsZ33sXnHSankX%2BTwhE8EE5S0m7qugp4KMi74tumrGo%0AL2AW5WmZRrN02kV9V5RTmeUpg5KSFnGA1mIQNlQ0Y1kZsYsoLW9ZxvOSF%2FkD%0AJfff12Uxo6T5Lls6i4MBvwV%2FUBLuNuuK7kLYI0%2BSJxV2Qxe%2Fg%2B0Bn2PpTCKk%0ABMTktBytR0B8LPf1b%2FM8Ode%2FaF4LA%2B3qxmkl30ijtXtdehABKhr8AJRcOm9E%0A%2BJtUGqfjRPXR42jlYITSTd97QKRJ%2Fdn682315AM%3D%0A
200
4 hops
1678 ms
Redirect chain
-
302
https://enterprise.githubsupport.com/hc/sitemap.xml341 ms -
302
https://enterprise.githubsupport.com/hc/restricted?return_to=https%3A%2F%2Fenterprise.githubsupport.com%2Fhc%2Fsitemap.xml&locale=en-us240 ms -
302
https://github.zendesk.com/access?brand_id=400594&locale=en-us&return_to=https%3A%2F%2Fenterprise.githubsupport.com%2Fhc%2Fsitemap.xml228 ms -
200
https://github.okta.com/app/zendesk/kxpia17hETAUWOCDZBZO/sso/saml?RelayState=https%3A%2F%2Fenterprise.githubsupport.com%2Fhc%2Fsitemap.xml&brand_id=400594&SAMLRequest=fZFPS8NAEMXv%2FRTL3pNsQpLWpUkJLUKgirTqwdtmM9rF%2FVN3NrX66aVRoSJ6%0Anfceb%2BY388XRaHIAj8rZiqYxo4t6Mkdh9J43Q9jZDbwMgIEcjbbIR6Gig7fc%0ACVTIrTCAPEi%2Bba7WPIsZ33sXnHSankX%2BTwhE8EE5S0m7qugp4KMi74tumrGo%0AL2AW5WmZRrN02kV9V5RTmeUpg5KSFnGA1mIQNlQ0Y1kZsYsoLW9ZxvOSF%2FkD%0AJfff12Uxo6T5Lls6i4MBvwV%2FUBLuNuuK7kLYI0%2BSJxV2Qxe%2Fg%2B0Bn2PpTCKk%0ABMTktBytR0B8LPf1b%2FM8Ode%2FaF4LA%2B3qxmkl30ijtXtdehABKhr8AJRcOm9E%0A%2BJtUGqfjRPXR42jlYITSTd97QKRJ%2Fdn682315AM%3D%0A447 ms
Final response headers (25)
| date | Wed, 16 Sep 2026 02:46:55 GMT |
| content-type | text/html;charset=utf-8 |
| server | nginx |
| vary | Accept-Encoding |
| x-okta-request-id | 2e35644e91ac60bed41a96ee668d1ec1 |
| 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=BB226E3DC92F8E7ABB7C62DE0E271627; Path=/; Secure; HttpOnly, t=""; Expires=Thu, 01 Jan 1970 00:00:10 GMT; Path=/, DT=DI1JiiefNMpQ3WQoRzWLOBi3A;Version=1;Path=/;Max-Age=63072000;Secure;Expires=Fri, 15 Sep 2028 02:46:55 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-HfgXs1DFf-6cV2jf5pDDiA' 'self' 'report-sample' github.okta.com *.oktacdn.com; style-src 'unsafe-inline' 'nonce-HfgXs1DFf-6cV2jf5pDDiA' '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'; report-uri https://oktacsp.report-uri.com/r/t/csp/reportOnly; report-to csp |
| 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-HfgXs1DFf-6cV2jf5pDDiA' 'self' 'report-sample' github.okta.com *.oktacdn.com; style-src 'unsafe-inline' 'nonce-HfgXs1DFf-6cV2jf5pDDiA' '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 |
| report-to | {"group":"csp","max_age":31536000,"endpoints":[{"url":"https://oktacsp.report-uri.com/a/t/g"}],"include_subdomains":true} |
| x-rate-limit-limit | 750 |
| x-rate-limit-remaining | 742 |
| x-rate-limit-reset | 1789526874 |
| 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
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
Click "Inspect"
host.tools issues real probes (DNS, HTTP, TCP, TLS, WHOIS where applicable) and renders the result in milliseconds.
-
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=https%3A%2F%2Fenterprise.githubsupport.com%2Fhc%2Fsitemap.xml
curl -s '/api/v1/http/headers?q=https%3A%2F%2Fenterprise.githubsupport.com%2Fhc%2Fsitemap.xml'
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.
- ✓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