HTTP headers
HTTP /api/v1/http/headersCapture every response header, follow redirects, time each hop.
https://www.google.com/travel/flights/unsupported?ucbcb=1&ucpp=CjlodHRwczovL3d3dy5nb29nbGUuY29tL3RyYXZlbC9mbGlnaHRzL3NpdGVtYXAueG1sP3VjYmNiPTE
200
4 hops
607 ms
Redirect chain
-
302
https://www.google.com/travel/flights/sitemap.xml111 ms -
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=132 ms -
302
https://www.google.com/travel/flights/sitemap.xml?ucbcb=1119 ms -
200
https://www.google.com/travel/flights/unsupported?ucbcb=1&ucpp=CjlodHRwczovL3d3dy5nb29nbGUuY29tL3RyYXZlbC9mbGlnaHRzL3NpdGVtYXAueG1sP3VjYmNiPTE145 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 | Wed, 16 Sep 2026 01:33:39 GMT |
| p3p | CP="This is not a P3P policy! See g.co/p3phelp for more info." |
| 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=* |
| cross-origin-opener-policy | same-origin-allow-popups |
| 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-pxsHkOVkRmk2kG_bI7OVgA' '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-resource-policy | same-site |
| reporting-endpoints | default="/_/FlightsFrontendUi/web-reports?context=eJwV03d8jlcbB3Dk5PkpSm2i3hArgoiUEJXnnudBKiQi41kiRJq0hEjE3rNmbUVUUyMIoVXUaMxQo1bMJiSSWjVaIzWi7_t7__h-znk-zznXdd3Xfd3VKj72a-xRKYD8qnlVCvX1qrSoa-tKaa30Sp1q9RP3PMPFqInhYubjcBG3OELEXIgQfu8jRO02keK1X6QYFxYpLk-OFKVTIkXu2UgxbNoAUdA4SjxvHSUetogWXlq0eJIULWqPihYvJkWLifeiRea_0eKRX4xoNixGOKfEiLezYkTJohjRvixGBDWKFX6NY8X8NrFish4rRi6NFcs2xopGm2LFvc2xotrlWNGril2sr2EXRyi5jl0ENrAL__Z2saiLXXxNd4LtYrdqF8FD7aJGql1cWWIX7zfYxeCtdpFASfR6u10MP2QXDfLs4uZtu3j0l12k-jhEh_4O0czpELYxDhFD66c4RPF8h0g55xD2QofoUeIQ9csdwt_DKQZSXFunOBnoFF91d4oVPZxii3SKLjanWJjoFNuGO8XREU6RT_PSnGIBeac7Rb2vnCJqgVN4LHYK5y9O8STfKXLhEo07usSNT1yiWx-X6E49KNzpEpvHuUTKeJfImuUSGXNc4k2mSwza5BK1trpEjb0uYT_uEu_OusR3V10i94ZLXLrlEn8UusSvJS6x775LVP3bJepWdovewi22VXWLHHpGJ6u7xaAW3Hd0i78D3SLgU7d4Tgf7uMUeh1usGuIWbxLd4vx4t_Ce6xbHyDXPLd5lusXG7W7RJNctZt38zXMVpWdd8JxN82gddWp22dOgUY0KPGdSaXaBZ26z657Px9_wrDfhhufXPlUsKym-VxXLqcVVLKdPelh88z0scVSeFmapmh5m2TC-n0U86Wd5PSjcsqdtpGXJzijLgQUxlv1BsZbyJ83RrX4HhFDLIH_4mv4Y_V9_jCW_CyFo-iAE1j9D4P9XCPZ6WrGPDtMvdIJO0lk6R7m1rHA0sWJJFyvyqX6IFb7UtZ8V58OtWBpphWq3wpJgRc5YK67T4XFWHJhrRfcFVigUQRULrai8xIqypbSOZ7dYMWmnFTf3WOGVZ0VQvhXPTlvx_a9WNL5iRWqBFcGFPFdsxYv7Vgwst2IIRVdT0PNDBe3rKqhdX0F9Cm2kYKu3gjrNFCzxIV8FK-lvfwV1uyiY1kfBhDQFx8cpeDRBQfJkBX2nKGgwW4FroYKXqxVUWaMgYYOCRVkKntMnmxUs3KYgJ1fB_N0KVtGLHxVM_knB-b0KjP2sgwLOKMg7T78p-PGSgibXFNiozXUFrwoVRJQomP5IwQwKfKKg8jMFTlpRoWCQp4qABioiW6mIpnia2UNFOQ36TEUCjaLEcBW2KBVTXCqOuVVcGKgiJ06FNlhF4BAVQaSQpP4USwlfqigbq2LfeBV_z1dRvEXF_q0qbu3gud0qetORIypa5Kv46pSKB5dVDLjOXCUq1t1XcfqxCo9yFRPfqJhKa2jXWxUvaUSFik3vVWyjjzw03KqmwauJhgZNudLsNhrMdhp6U2h7DX2oL40I1DCSJodoCFM0-KkaOtJSukwtNA0ZBuP01tAlTMNBqojSUDlaQ7hLwwCaEq8hPVHD7uGMnaJh_wjGS9VwYayGV-N4dryGzhNZw3QNCbM0DKVESqaJNInaLdfQcLWGgs0aZmRryN3OePQjnaAjORqa52r4aI-GaQc01DyooQ49P6ShnJqe5v_04oIG78saWlLENQ2ZtzT8XKKhw3MN37zQsLOyjh8oxlOHkzbQJiqupeOBlw79PzrCW-o44KfjEKV21LGYltO4zjomU_WuOmrROjrUXUeZ1PHapqOCBkXpGEq3o3WMidcxlrYP0bGL7iTpaJasY3aqji7pOrqSM0OHz1QdrSnuax2Ps3U8pZe5Or7fpyObEo_p-ILmnmYdF3VEFegYQiOv66jzu466VJ_8C3UEUk6RjoLbOq6X6Oh1V0cGjaVOZcxL4oWOza90bKOGb3R0rmSgG-31NDDJYuBWXQNGQwNaUwM2CvYxEN_GQBIVtTXwS0cDXkEGpmkGZtEmw8ARspsGRlMOvaXDNgPtehrIoGu9DMwMNTCb5tFbhwHhNKAOZi7ySDYAWpJmYDmtoJW0mvxGG9gww8BGylvEvKuZl66tMVBMliwDaVsM5NMZCs02MOcH1rHHQPYBA9Y8xjpvIJOe0pOLBpRbBoYVGRhJKXcN3Cw1MOCxgYg3BnzfGehHfeqZGEAD6T0daGziIB2mcc1NZLU2MdzXRKifiXBKDjLRvpuJZdQg2EQjKqLS_--7m2jdw0Q7umuYKKO39GdPE2vDTHxLZ_qauESD-5tYbjexmtY4TPR3moimeFoZx5g0Nd5EfpKJvqNNPMsw0X2MibPUYLyJ5pN5d7qJdaTPMGFQ79kmUuaYGEWD5pvYt8iEz1ITD5eZaLzRxJ3N_L3PxBc0jCrtN2H7mTEOmhh61ETscRO5p0zMP8OazjL3ORN_XDJRfoU9KjDRrdBED3IUmWhSbMKbUktMpNFD-qeMee-buPLAxMWHJgqo4WMTu56Y-InuUCk9eMo-PDcR9NKE-or1UxgF_GMi5F8TbStJBNMED4mptPIDiTUUXUPCQWtrStyj5rUkDtBrL4kKkh9LhNJROk9l3hIP6Exzido-EnNpDU1oKTGRJlMO7aBcKqLbVEw1W0nUotr0sjXPtJH4gfr5Srj9JAaRpZ1EdfqQalJdqk-n20u06iThS3mdJU5QPp2jk0Gsh4aHSGywSmylP3UJe6hEIRVTxmcSk_pITKfbNCdC4gO7xEKHxBJaRhvpzkCu8RKbaVwy79CDLyR8hkkMTpUYki5xIUPCHMPaJkk0pLBpEodmS3jPkfBaKPHpYgmFfl8uEbmK9XzDXtCsNcxLC2nHWonEdRJ7KSxTYgBNWi9xeYPENSqkd_SeUr6TGEGptJbW0Xq6TXeohKpnSdSgmtSNgulTGkqJlERLaRmtoDw6QsfoGl2nm-TxvYQgC9moJ_Wmb2kDZdFdKqU_6A29pQpK2iiRTF_SdsqhnXSMjtNJ6rRJIpA6U4dsCX8KoJGUTntp-TaJb-jJLj7Tbs4Cee9hP-j0T3zXVHhQIvMo7xyX6HtCoj_lneQz0NJ8zupvEhfpMtW-wLkhP4qiqTSd1tBJOkU7rnKlInp-TaKcWhayNsoq4nu7zfvFnPFSzjiFljEv9adMKrjPPtKIh5w1GvCU8Z7x-3krEftOwkUJ5FnVhqpUjXrRZxRG6z-w4Vc6S8X0D72hltVs6EcRlEiTaApto6t0nR6TR3UbPKkj2agXpVI6ZVBebRtK6EZdGyrXt8GgdGrmZcN3TW1o9x8bv20bntK65jZk0rdUr6UNt1vbcJfuUVR7G37vYoMr2IZWPWw4brXhL6oTakN7auWw4V0C6_6ce2pDsU1eda1To-qL0i1XLR9dzN44r7JPh8EjUuPSR8VnDB3WIXHUiJT0oSkJHRKHJX-elJ7WYXRyXGBAYFBAcKfO_gEBcSMD_gd1GbV8" |
| content-encoding | br |
| server | ESF |
| x-xss-protection | 0 |
| x-frame-options | SAMEORIGIN |
| x-content-type-options | nosniff |
| set-cookie | __Secure-ENID=CokCCAISuwEBAQxeRWo8q9C4gphdKg41oPN8XciIypNuJLOrYYdJs8fDnQL2QzeOKPkZznYVbFF0B2negEwhQ1w-l_p8DBNfrX8z-x8vTMdfTwVNK2cEPbJhtPEKblcBZohiywC4OaOvkeLbIds6clEIUF5A8jAjuhUEt2VPET04bGzTpjMHBae9hj_IdQl4WGvEj_MpSJ_irsrbMm129VjEsTpOu8FsRRvT-KVbCJzKQre_7X-y4_PoVKcnx801j8VQKAIyRQF9bMSqp61Vv8w1ZAOkaP033z1YRgBLPXj856nXxv9S4i4Pjc48VZU3vF4rKD1pkJQCqa-EudisiGMqTaPImhyyh3P3DA; expires=Sat, 16-Oct-2027 17:51:57 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)
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%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.
- ✓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