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://ws.help.github.com/request/landing 200 2 hops 957 ms
Redirect chain
  1. 302 https://ws.help.github.com 316 ms
  2. 200 https://ws.help.github.com/request/landing 323 ms
Final response headers (20)
date Sat, 31 Oct 2026 17:34:17 GMT
content-type text/html; charset=utf-8
x-frame-options SAMEORIGIN
x-xss-protection 0
x-content-type-options nosniff
x-download-options noopen
x-permitted-cross-domain-policies none
referrer-policy strict-origin-when-cross-origin
cache-control private, no-store
link <https://support-assets.githubassets.com/assets/frameworks-724b679156fe39b3095797ca2aebb4ce6018f2c3868aa62dd8576254871ca804.css>; rel=preload; as=style; nopush,<https://support-assets.githubassets.com/assets/main-664a4b6757f54cb558857147bc24873765d60f1e34d4f8acdb9f474a30368370.css>; rel=preload; as=style; nopush,<https://support-assets.githubassets.com/assets/footer-58d5a48057e52a2dffda3be05c3aaad80c14febb778f3c0770dd66c4df2e39ac.css>; rel=preload; as=style; nopush,<https://support-assets.githubassets.com/assets/primer-brand-0a7cbf83af0de3d3f10aa44869ff51e80fba14df5c07d9b54ce5fd90c3b6ed4a.css>; rel=preload; as=style; nopush,<https://support-assets.githubassets.com/assets/noscript-924d3b7092f08eead0c93be8ab8c5683495244312eab41b6040251c1b85a7a4b.css>; rel=preload; as=style; nopush,<https://support-assets.githubassets.com/packs/css/911-9c6d6170.css>; rel=preload; as=style; nopush,<https://support-assets.githubassets.com/packs/css/react-06ceabbd.css>; rel=preload; as=style; nopush
vary Accept,Accept-Language
content-security-policy default-src 'none'; font-src https://support-assets.githubassets.com; style-src 'self' https: 'unsafe-inline'; img-src https: data:; script-src https://support-assets.githubassets.com; connect-src 'self' wss://ws.help.github.com wss://ws.helphub.github.com wss://ws.support.github.com https://enterprise-bundles.github.com https://github.zendesk.com https://esbtoolsproduction.blob.core.windows.net https://support-assets.githubassets.com edge.fullstory.com rs.fullstory.com github.blog https://ps-resources.github.io https://marketing-forms-api.github.com
set-cookie _support_session=KuD07vaX7MjyLKoavtLBnmKkmuWIifYKhhg3Z%2FF9BZYQQhzXSmqTt6GJsIzkFGA%2BFYNYMhF40%2ByfoKcLdlzU%2FBxTJwN3pv9ly%2BP833Llqdm9X7CtRNr5HvBvGNpMAqZwr4I%2FoVPsp4m31xQ6OxUDCUShglK5TXpRs84KW9Bj%2BcHnYSCnwD6s4HRuYn24IVxx829WLXKtiLHd3rJX82f2wWPxRjrNg0IceKJstyM8M7YZ8inSvQB51plLoyNNz7ZbYSd2HIUf6lnIiH90b4KXtgDFU7578jLP--O5XmpqVESLOsmGWV--ysaHV6EUIE1hWfx5YfQF4g%3D%3D; domain=help.github.com; path=/; secure; httponly; samesite=lax
x-runtime 0.040005
strict-transport-security max-age=63072000; includeSubDomains
content-encoding gzip
x-github-backend Kubernetes
x-github-request-id E4CE:1947C2:AE39C5:C6BB39:6AE62699
x-github-edge-region iad
server github.com
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=ws.help.github.com 
curl -s '/api/v1/http/headers?q=ws.help.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