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: HTTP headers Security headers grader Redirect chain tracer SSL certificate inspector robots.txt parser sitemap.xml inspector
https://www.google.com/travel/flights/unsupported?ucbcb=1&ucpp=CjlodHRwczovL3d3dy5nb29nbGUuY29tL3RyYXZlbC9mbGlnaHRzL3NpdGVtYXAueG1sP3VjYmNiPTE 200 4 hops 382 ms
Redirect chain
  1. 302 https://www.google.com/travel/flights/sitemap.xml 74 ms
  2. 303 https://consent.google.com/m?continue=https://www.google.com/travel/flights/sitemap.xml&gl=NL&m=0&pc=flt&cm=2&hl=en-US&src=1 38 ms
  3. 302 https://www.google.com/travel/flights/sitemap.xml?ucbcb=1 73 ms
  4. 200 https://www.google.com/travel/flights/unsupported?ucbcb=1&ucpp=CjlodHRwczovL3d3dy5nb29nbGUuY29tL3RyYXZlbC9mbGlnaHRzL3NpdGVtYXAueG1sP3VjYmNiPTE 98 ms
Final response headers (21)
content-type text/html; charset=utf-8
vary Sec-Fetch-Dest, Sec-Fetch-Mode, Sec-Fetch-Site
x-ua-compatible IE=edge
cache-control no-cache, no-store, max-age=0, must-revalidate
pragma no-cache
expires Mon, 01 Jan 1990 00:00:00 GMT
date Sat, 09 May 2026 15:34:11 GMT
p3p CP="This is not a P3P policy! See g.co/p3phelp for more info."
accept-ch Sec-CH-UA-Arch, Sec-CH-UA-Bitness, Sec-CH-UA-Full-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Model, Sec-CH-UA-WoW64, Sec-CH-UA-Form-Factors, Sec-CH-UA-Platform, Sec-CH-UA-Platform-Version
content-security-policy script-src 'report-sample' 'nonce-X8ZMNy4yb9nm7sZFiu9WNg' 'unsafe-inline';object-src 'none';base-uri 'self';report-uri /_/FlightsFrontendUi/cspreport;worker-src 'self' blob:, require-trusted-types-for 'script';report-uri /_/FlightsFrontendUi/cspreport
cross-origin-opener-policy same-origin-allow-popups
cross-origin-resource-policy same-site
permissions-policy ch-ua-arch=*, ch-ua-bitness=*, ch-ua-full-version=*, ch-ua-full-version-list=*, ch-ua-model=*, ch-ua-wow64=*, ch-ua-form-factors=*, ch-ua-platform=*, ch-ua-platform-version=*
reporting-endpoints default="/_/FlightsFrontendUi/web-reports?context=eJwN0XlYFdcZBnCE997PuNTdsjwJVBtRKopYVBTOGYNV68ZyhXvnzoy4gPsGEhUXMKlLIm6YuqbcxxqjUROJkaiNdYtKYw2h7kuMxkYxkNiIRqJxefr-8XvOmTPfcr6ZJh-3jAkLCYqjRIppEh40qHN40KrenYJmvfpaUNeiIUE9WqSixpWG_AVpWPxjGrJXp8NbnY6Y5-mYMzYDraI9eBzjQeFwD84VefBdsQflZzy4SVPfGIkLYZl40CkT9VWZqO2YhfD-Wbg3MQut8rPwcGEWFtRkoexFFsb19yJqqhdWsRe_LvHi1iovvtjjRcNhL3533ouut73oFepDTJgPJdE-NEn0oeg1H8oW-TBzrQ_vbPMh9H0fkrb7UEM99zHmnA-Dg02ceMlEoJmJYzSptYk_tjUR395Et64mViWYuJloYq9hYkCaicRcEyOnmBg73USzPBPnS00838LnnSZyaCI93m1i2j9NtD9q4u4JEzXnudK5iyau3jBRd5-5L_uR18GPvh396Ed7evsRm-FHlOXHwDl-eClQ7Me3JX5M_9IP87ofSbf8aNfgR90TP7qFWBhFpc0tmBEWsrtYqKUxPSycirfwdl8L65Is7PiThYSBFnJGWFg53kLTaRZ20fEZFipp-SwLKyiywELbty1krrAQspq1yy2sPsR6hy1YRyzcq2SPKgvpVy2Ui4370TbCutu40tNGn2E2-lISRftspFk2thfa6DLPRixNp61LbMxeZuP4WhuV9KTMxrMtNvLeszH6fRstdtpott_GpmM2ysg8YaP-JNczNp7S1mrWpL9ftHH7ko0PLtsIvWKjnM5es3Hnuo3Tt2wcuGujcb2NF89slLyw0aaRgz_DQSrNEwe7Gjv4kH6iU00djIlw0CfSQRLNp9EdHfi68z0NiXcwguoprp-DB7RBOyjp7-DQMJ5nODhtOqjw83ycgyfjHZyd5GBlnoOqeQ4i33LwOdnLHWRvcvC0zMG7AQfbdjuIKHfw8OBG183igGvyooBr1XsB15KrX7k2UMHWatdSWk5_ox5R51wplB96wbWYvvvggqs86rLrwbwrrrbzr7jmSrB7TYdg93oK6Rrszk0KdvtSgt0fDQ52_2tosHvzyRD3VtpBR-gsNcwa7m5cMNyNe6nux6PT3G096e6F69Ld629kuCu6eNyzf_W4F0Vkuqd8AplGMdXJcui_yXKU2tUmSxgN_SFZut1PltLHybKe9ruUHKDDdIRO0ik6Q19SeQslzcKV-COUZEYryeispH1PJZUJSvokKkmidslKOtMKreR4ipKfqHeqklTaTVVpStZ6lNR6lRimErGVZE9TUvg6axWyNxW-pWQhfUZ9VyjRlE7PVirZvEZJgBqVKtmxVsltGrWb8Xu4L1dytULJxSNKwo9ylhNKvq7kHFWcg3b-R8keWnVWSdh5JXkXlBRRxSUl4y6zxzUlsV8rSbyu5E6Nkjr65S5r1yqJ_IF9GhhHBTSXjj1XsvcF7xKkpcNLWrKaaBnUXIuHwltq2dtaS0wbLa3aaWlHQ0K1RIVp2RmppXWUltIOWn75vZbt0dx31rKeuv5ByzE6QRPitCyjNgla6ntpeaeflr9STLKWbnR6GHumaUnJ1JI3QctRujNZSy3ZU7SMpr9M0zJ4hpaMfObOYd1CLZ_O07Kf6uZruVukZUQx897UErJUS3tqWKbl5RItVWsYt07LZ3Rjg5afN2rpu0lLo81aFryr5VJAS84WLdu2anlAZTu0BHbxnru1RHyoJexjLQs_0fIGzdinZRY9pKJPeeeD_FYUWqml4gstcf_meoYzVHG2r7jSvrP8jpe0DKDoy1q-uaYl9TpnpkeUdkvL5LtaJn2vZSq9Wcd5Kf4e712vpfqRljVPtdQ80_KKy5AMGk1X6HYTQ2Y2NWRue0OO_NaQjWGG7KKwcENu0rBXDHFHGuJ51ZAsGkPJ0YZo6k89uxvSvIchC-n7BOb2NqR7H56TQYuTDGmgFMX4FENsOkXLBjB-kCE_khpsSN5QQ74Zacgt-p9lSLFtyFLHkM_pN6MMqaV7NCrbkO00cJwhQ3MNyZliSKs5hlTMN-QgzV9iyF7qVGJIYDV7lRqyP2DwnxhyYKchdR-xJ63Yzz2Z_zDk-DFDzp03ZHnUcCklX8Sj3q2bNX6443m1u-W3P5dcDO4QO3ZGXnZB_pjZuVNjx-fPmF6QOz0ndvzUSRMmFsyKfX1SdnxcfK-4hLhe3eLis2fG_R-8fr2L"
content-encoding br
server ESF
x-xss-protection 0
x-frame-options SAMEORIGIN
x-content-type-options nosniff
set-cookie __Secure-ENID=33.SE=VOIboPtcbuXN6H_VBaOkoR7ND7RJP-4EQuhhTd4hgYxn-J91qjCLbocofmU1F7UA4lsGjM4BEj-YzwEc3WetkvjI6DjfgPcO61E-UcWT8eYBU9J7x9ymH8BaitAS5iompExWhTM-u_0ZVpAwp0CyJVsigaOm1ynefcqs6vFUHFXj6uweUNKVphQP2n11WqSiDQhuP4QKsRdVtY6R-lERETiU_PemMXbS5a9rotZ2IDGU; expires=Wed, 09-Jun-2027 07:52:29 GMT; path=/; domain=.google.com; Secure; HttpOnly; SameSite=lax
alt-svc h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
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=https%3A%2F%2Fwww.google.com%2Ftravel%2Fflights%2Fsitemap.xml 
curl -s '/api/v1/http/headers?q=https%3A%2F%2Fwww.google.com%2Ftravel%2Fflights%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.

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