HTTP headers
HTTP /api/v1/http/headersCapture every response header, follow redirects, time each hop.
https://help.github.com
200
1 hop
281 ms
Final response headers (21)
| 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 | public, no-cache, s-maxage=120 |
| link | <https://support-assets.githubassets.com/assets/frameworks-d23d692b2e493a014d6f8d9edfd842ca208f57ed4921d07d56092d9c1a2757ac.css>; rel=preload; as=style; nopush,<https://support-assets.githubassets.com/assets/v2/main-cd6a18a0c439bb3557d293d3c193923ee6839cb772a4f35887db70f1dc575b6c.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/979-6874b2ec.css>; rel=preload; as=style; nopush,<https://support-assets.githubassets.com/packs/css/react-7a382752.css>; rel=preload; as=style; nopush |
| 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; child-src https://octocaptcha.com https://funcaptcha.com |
| x-runtime | 0.103229 |
| x-github-edge-region | iad |
| accept-ranges | none |
| age | 96 |
| set-cookie | _show_support_cookie_banner=1;SameSite=Lax; Secure; Path=/, _show_support_cookie_banner=1;SameSite=Lax; Secure; Path=/ |
| content-encoding | br |
| date | Tue, 15 Sep 2026 23:09:11 GMT |
| vary | Accept-Language, Accept-Encoding |
| strict-transport-security | max-age=31536000 |
| x-fastly-request-id | bcac64025e641950b9fb6ac2f72eb8016310c2d0 |
| content-length | 15571 |
Tech stack
Fastly
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=help.github.com
curl -s '/api/v1/http/headers?q=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.
- ✓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