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.imket.app 200 1 hop 1464 ms

Final response headers (13)

server	nginx
content-type	text/html; charset=UTF-8
vary	Accept-Encoding
pragma	no-cache
expires	-1
set-cookie	XSRF-TOKEN=eyJpdiI6Imd6VkRKNW9NOUc2TVNvM3FlWXlOVmc9PSIsInZhbHVlIjoicVNyRUdNbmNtMHNwTWNvVDlYS2t4RGIwNDdtT0dLSXlnekNHWkdqNmVMb3ZTeUZKeksxb2grTHRGWnFjOUVBK3ZSYWlsTkFrWnNkcWQ2dGtEWlFDMWpKdnZJMks1YTM2MDBQUkNNN1dRSmZRQUdzVGRQYVpFRVZMek1HZUdmYzgiLCJtYWMiOiI2YjZmMzM5MjBlNzA5NjczOWU1YjhhNTRmNWEyMGVjNWVhYjQyMDI3ODJmZjcxY2EwNzI1ZjZmMDVlNzQxZGZmIiwidGFnIjoiIn0%3D; expires=Sat, 09 May 2026 16:27:14 GMT; Max-Age=7200; path=/; samesite=lax, laravel_session=eyJpdiI6IlIxbzFuWC9lMThHblRnQmlyVUJ1cWc9PSIsInZhbHVlIjoib2drVldxTlc1blpDaTZaR2RqOGwxWXZyQmt0OElGQXJpeTZSbXlYaUlLY1J5NW9VVWxwYk9lbUdoVVVIblQ5MEZmRUFkZ3I1dndQWlhrZWpSNVdjRTd6N2x2eEZQb3Y2QVFLS0hVbXhMc0FaM1RyTkJXUGNqNUl1YmFKbGFib1oiLCJtYWMiOiJiMWEzMTc1NDk4ZGFhYThlM2RiNDgxOWZmMTkwMWQwZDZhZDM0ZWNlYTBkMTI0MGY0ZTlkNjFiMzFmOTM3NGNjIiwidGFnIjoiIn0%3D; expires=Sat, 09 May 2026 16:27:14 GMT; Max-Age=7200; path=/; httponly; samesite=lax
strict-transport-security	max-age=31536000
content-encoding	gzip
cache-control	private, must-revalidate
alt-svc	h3=":443"; ma=2592000,h3-29=":443"; ma=2592000,h3-Q050=":443"; ma=2592000,quic=":443"; ma=2592000; v="46,43"
date	Sat, 09 May 2026 14:27:13 GMT
eo-log-uuid	4984044651949232920
eo-cache-status	MISS

Tech stack

NginxHTTP/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=www.imket.app

curl -s '/api/v1/http/headers?q=www.imket.app'

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