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://business.google.com/nl/google-ads/?ucbcb=1 200 5 hops 582 ms
Redirect chain
  1. 302 https://adwords.google.com 160 ms
  2. 302 https://ads.google.com/intl/en_NL/home/ 37 ms
  3. 303 https://consent.google.com/m?continue=https://ads.google.com/intl/en_NL/home/&gl=NL&m=0&pc=acm&cm=2&hl=en-US&src=1 36 ms
  4. 301 https://ads.google.com/intl/en_NL/home/?ucbcb=1 99 ms
  5. 200 https://business.google.com/nl/google-ads/?ucbcb=1 124 ms
Final response headers (22)
content-type text/html; charset=utf-8
vary Sec-Fetch-Dest, Sec-Fetch-Mode, Sec-Fetch-Site
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 16:22:33 GMT
p3p CP="This is not a P3P policy! See g.co/p3phelp for more info."
strict-transport-security max-age=31536000
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=*
content-security-policy-report-only require-trusted-types-for 'script';report-uri /nl/_/GoogleAds/cspreport
content-security-policy script-src 'report-sample' 'nonce-k390O_dPnrHla07DddMISQ' 'unsafe-inline' 'strict-dynamic' https: http:;object-src 'none';base-uri 'self';report-uri /nl/_/GoogleAds/cspreport;worker-src blob: 'self'
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
cross-origin-opener-policy same-origin
cross-origin-resource-policy same-site
reporting-endpoints default="/nl/_/GoogleAds/web-reports?context=eJzjctDikmII0pBi-LxjBus6x8us64F4MxBvBeLtQMy88QorKxA3i9xh7QTigx2-bIeB-DgQb9EMZhPi4Ti57-95NoEXS0-vY1ayTcovjE_NS09MT9XNTSzKTi3JzEvXTSwtyc9NLMnMz9NNqcxLzM1MTs7PK0nNK4k3MjAyMzA1MNMzMIsvMAAAO801gg"
content-encoding gzip
server ESF
x-xss-protection 0
x-frame-options SAMEORIGIN
x-content-type-options nosniff
set-cookie __Secure-ENID=33.SE=qLCuOYijP6WGGhP9rzFPfidkEI42bZDNSfdMJGaiOIk-X38ih9VqgBS6m-frCxj87jhWN6gxTAnn99NQ3SMFEWeKTl6S9_yS6yhAe1hRJkN04M90ylJbg6Z4Cpoq7NaEHpc1QVpSXBnC6gIO53kKM9ADT-mEFE0j_OZGvj-5IwRMT1LXAFdszzBh9NY0XSKKqZBV4j-8WcnUUnkcyfvs7Jjl0TldZLIQ5Xci_rn5uoUbSdemBZ3g4g; expires=Wed, 09-Jun-2027 08:40:51 GMT; path=/; domain=.google.com; Secure; HttpOnly; SameSite=lax
alt-svc h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
Tech stack
Google Tag ManagerHTTP/3 (QUIC)
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=adwords.google.com 
curl -s '/api/v1/http/headers?q=adwords.google.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