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://login.corp.google.com/request?s=m.guts.corp.google.com:443/uberproxy/&d=https://m.guts.corp.google.com/%3Fupxsrf%3DAM2vRLmFVJGK9xIJPANSImHqK37O3Ss2D_6ci0unn8iRVIRwtQ:1778346740664&maxAge=1200&authLevel=2000000&keyIds=588916238,1331854303,-337386367,788849210,-1430978537,1163017845,-100563820,2023603197&c=1 200 2 hops 161 ms
Redirect chain
  1. 302 https://m.guts.corp.google.com 45 ms
  2. 200 https://login.corp.google.com/request?s=m.guts.corp.google.com:443/uberproxy/&d=https://m.guts.corp.google.com/%3Fupxsrf%3DAM2vRLmFVJGK9xIJPANSImHqK37O3Ss2D_6ci0unn8iRVIRwtQ:1778346740664&maxAge=1200&authLevel=2000000&keyIds=588916238,1331854303,-337386367,788849210,-1430978537,1163017845,-100563820,2023603197&c=1 56 ms
Final response headers (17)
content-type text/html; charset=utf-8
strict-transport-security max-age=7776000
content-security-policy script-src 'report-sample' 'nonce-j8pIHyzyd-l_HwNmvSF6YA' 'unsafe-inline' 'strict-dynamic' https: http: 'unsafe-eval';object-src 'none';base-uri 'self';worker-src 'self';report-uri https://csp.withgoogle.com/csp/corplogin/1, require-trusted-types-for 'script';report-uri https://csp.withgoogle.com/csp/corplogin
p3p CP="The P3P policy for this service is commensurate with internal security policy guidelines."
set-cookie S=sso=9MlN6HfelyxmurZQOcyv6_UgtYyHDaAM;Domain=.google.com;Path=/;Secure;HttpOnly;Priority=LOW, LOGINDONE=; Expires=Sun, 13-Aug-2023 17:12:20 GMT; Path=/; Secure, __Host-xf=EXPIRED;Path=/;Expires=Mon, 01-Jan-1990 00:00:00 GMT;Secure;SameSite=strict
x-robots-tag noindex, nofollow
cross-origin-opener-policy unsafe-none
content-encoding gzip
date Sat, 09 May 2026 17:12:20 GMT
server ESF
x-xss-protection 0
x-frame-options SAMEORIGIN
x-content-type-options nosniff
accept-ch Sec-CH-UA, Sec-CH-UA-Arch, Sec-CH-UA-Bitness, Sec-CH-UA-Full-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform, Sec-CH-UA-Platform-Version, Sec-CH-UA-WoW64
permissions-policy ch-ua=*, ch-ua-arch=*, ch-ua-bitness=*, ch-ua-full-version=*, ch-ua-full-version-list=*, ch-ua-mobile=*, ch-ua-model=*, ch-ua-platform=*, ch-ua-platform-version=*, ch-ua-wow64=*
expires Sat, 09 May 2026 17:12:20 GMT
cache-control private
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=m.guts.corp.google.com 
curl -s '/api/v1/http/headers?q=m.guts.corp.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