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://www.githubstatus.com/ 200 2 hops 321 ms
Redirect chain
  1. 301 https://status.github.com 271 ms
  2. 200 https://www.githubstatus.com/ 31 ms
Final response headers (30)
content-type text/html; charset=utf-8
date Tue, 15 Sep 2026 23:09:03 GMT
x-download-options noopen
x-permitted-cross-domain-policies none
referrer-policy strict-origin-when-cross-origin
x-statuspage-version 2563013abdbd53c189dd67cfefa343497901ce12
strict-transport-security max-age=259200
x-statuspage-skip-logging true
access-control-allow-origin *
cache-control max-age=10, public, s-maxage=10, stale-while-revalidate=20, stale-if-error=3600
link <https://dka575ofm4ao0.cloudfront.net/assets/register_subscription_form-589b657fec607087fc5c740c568270907310bc4f6aaa20256e70f01b103025ca.js>; rel=preload; as=script; nopush,<https://dka575ofm4ao0.cloudfront.net/assets/status_common-a86dffb81955091741c3de8bded6ce66ae0c6d8f736b57b580f853d9f892727e.js>; rel=preload; as=script; nopush,<https://dka575ofm4ao0.cloudfront.net/packs/0.6d587e2c8ae0df459ecd.css>; rel=preload; as=style; nopush,<https://dka575ofm4ao0.cloudfront.net/assets/status/status_manifest-3975cac43f498cd81d991d1abc986307c014f9c6ec29a9abfeb3b0882674850a.css>; rel=preload; as=style; nopush,<https://dka575ofm4ao0.cloudfront.net/assets/jquery-3.5.1.min-729e416557a365062a8a20f0562f18aa171da57298005d392312670c706c68de.js>; rel=preload; as=script; nopush,<https://dka575ofm4ao0.cloudfront.net/assets/status_manifest-9446cbd3af4b0e3706e85200ffeb5f09d6410458c7aea582354bfd4bc5546b5e.js>; rel=preload; as=script; nopush,<https://dka575ofm4ao0.cloudfront.net/packs/common-3e6e8c878eea26f45b29.chunk.js>; rel=preload; as=script; nopush,<https://dka575ofm4ao0.cloudfront.net/packs/globals-f12471d5e878ec0f0705.chunk.js>; rel=preload; as=script; nopush,<https://dka575ofm4ao0.cloudfront.net/packs/runtime-33399279767e29d9b814.js>; rel=preload; as=script; nopush
x-pollinator-metadata-service status-page-web-pages
etag W/"37e573ee8e7ea8d1dbb3f16f40d59f73"
x-runtime 0.103679
server AtlassianEdge
accept-ranges bytes
x-content-type-options nosniff
x-xss-protection 1; mode=block
atl-traceid d5dce1ecc0ac4ec18a6b591575c8fb28
atl-request-id d5dce1ec-c0ac-4ec1-8a6b-591575c8fb28
report-to {"endpoints": [{"url": "https://dz8aopenkvv6s.cloudfront.net"}], "group": "endpoint-1", "include_subdomains": true, "max_age": 600}
nel {"failure_fraction": 0.01, "include_subdomains": true, "max_age": 600, "report_to": "endpoint-1"}
content-encoding br
vary Accept,Accept-Encoding
x-cache Hit from cloudfront
via 1.1 c7bab7f41a417f507a6cc2ea3757f7c2.cloudfront.net (CloudFront)
x-amz-cf-pop AMS56-P1
alt-svc h3=":443"; ma=86400
x-amz-cf-id i8t3XI2WG6iDPbcg-n1YqaLxuQONgguSe6LqHeIZaynBLARd0mJ5dQ==
age 20
Tech stack
HTTP/3 (QUIC)
Sponsored host.tools Pro
Bulk lookups · monitors · webhooks · 10,000 API calls/day

Upgrade to Pro for $19/mo. Cancel anytime. Works with the same API you already use.
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=status.github.com 
curl -s '/api/v1/http/headers?q=status.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