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://abcnews.com/ 200 3 hops 293 ms
Redirect chain
  1. 301 https://abcnews.app 56 ms
  2. 301 http://abcnews.com/ 22 ms
  3. 200 https://abcnews.com/ 176 ms
Final response headers (13)
content-type text/html; charset=utf-8
date Sat, 09 May 2026 09:03:34 GMT
set-cookie region=emea; path=/; Expires=Sat, 16 May 2026 09:03:34 GMT;, _dcf=0; path=/; Expires=Sat, 16 May 2026 09:03:34 GMT;, SWID=7D3F25A4-A888-4F6E-CF4B-B0439E27352B; path=/; Expires=Wed, 09 May 2046 09:03:34 GMT; domain=abcnews.com;, userab_1=2bc03d0b66620ccd162a3a520155a648~abc_shop_x_gma_shop-530%2Ashop_gma-2208%2Cabcn_popular_reads_exp-542%2Avariant_b_7days_filter-2288%2Cabcnl_lead_video-543%2Aarticle_2nd-2290%2Cabcnl_wire_video-564%2Awire_vod-2417%2Ckabc_content_recs-577%2Avariant_a_control-2480%2Cnews_index_vod_pages_design_unification-501%2Avariant_b_vod_redesign-2099%2Cnews_live_index_pages_design_unification-502%2Avariant_b_live_dark-2101%2Cotv_search_page_design_unification-546%2Avariant_a_control-2299%2Cotv_web_content_rec-539%2Avariant_c_trending-2268; Expires=Sat, 09 May 2026 13:03:34 GMT; Domain=abcnews.com; Path=/
server nginx/1.28.0
expires Sat, 09 May 2026 09:03:43 GMT
last-modified Sat, 09 May 2026 09:03:43 GMT
cache-control max-age=9
vary Accept-Encoding
x-cache Hit from cloudfront
via 1.1 af1da25c2dddf71cac076999aa9861e6.cloudfront.net (CloudFront)
x-amz-cf-pop AMS58-P3
x-amz-cf-id DYJmkriesiqFOMc5daCLCjmoEYBcMebDJu5fGVMc0--45xxL6HwR0g==
age 2
Tech stack
Nginx
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%2Fabcnews.app 
curl -s '/api/v1/http/headers?q=https%3A%2F%2Fabcnews.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