HTTP headers
HTTP /api/v1/http/headersCapture every response header, follow redirects, time each hop.
https://www.widn.ai/sitemap.xml
200
1 hop
127 ms
Final response headers (25)
| date | Sat, 09 May 2026 20:56:33 GMT |
| content-type | text/xml |
| content-security-policy | default-src 'self'; script-src 'unsafe-eval' 'unsafe-inline' 'self' https://cdn.equalweb.com https://*.mouseflow.com https://enhanci-widgets.s3.eu-west-2.amazonaws.com https://*.hs-scripts.com https://*.hs-banner.com https://*.hscollectedforms.net https://*.hs-analytics.net https://*.googletagmanager.com https://*.google.com https://*.gstatic.com https://*.zdassets.com https://*.hsforms.net https://*.jsdelivr.net https://*.cookieyes.com https://*.mxpnl.com https://*.bablic.com https://*.s3.amazonaws.com https://cdn-cookieyes.com https://*.cdn-cookieyes.com ; style-src 'unsafe-inline' 'self' https://enhanci-widgets.s3.eu-west-2.amazonaws.com https://fonts.googleapis.com ; object-src 'none'; base-uri 'self'; connect-src 'self' https://cdn.equalweb.com https://*.mixpanel.com https://*.hsforms.com https://enhanci-widgets.s3.eu-west-2.amazonaws.com https://cognito-idp.us-east-1.amazonaws.com https://*.google.com https://*.google-analytics.com https://*.analytics.google.com https://*.enhanci.com https://*.widn.ai https://*.bablic.com https://*.cookieyes.com https://cdn-cookieyes.com https://*.cdn-cookieyes.com https://*.mouseflow.com https://*.zdassets.com https://*.zendesk.com https://*.hscollectedforms.net ; font-src 'self' https://*.s3.amazonaws.com https://*.scalar.com https://fonts.gstatic.com ; frame-src 'self' https://*.mouseflow.com https://*.hsforms.com https://*.google.com ; img-src 'self' https://*.mouseflow.com https://cdn-cookieyes.com https://*.cookieyes.com https://*.hsforms.com https://*.hubspot.com data: ; manifest-src 'self'; media-src 'self'; worker-src 'none'; |
| last-modified | Tue, 17 Mar 2026 10:00:42 GMT |
| server | cloudflare |
| x-amz-server-side-encryption | AES256 |
| cache-control | public,max-age=31536000,immutable |
| content-encoding | br |
| etag | W/"d9d77a3dc611b5c6eb05c28391148ed8" |
| vary | Accept-Encoding |
| x-cache | Hit from cloudfront |
| via | 1.1 ec87b0eaae98600539e64627bd582e82.cloudfront.net (CloudFront) |
| x-amz-cf-pop | AMS58-P5 |
| x-amz-cf-id | 3jLyEDvsd6rqMafldEqo3tSxZo0WpFaBEqulS-h-ICQcnboQYQ5iew== |
| age | 7538 |
| cf-cache-status | DYNAMIC |
| strict-transport-security | max-age=31536000; includeSubDomains |
| x-content-type-options | nosniff, nosniff |
| report-to | {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=8ATUrEZveIfIx%2FclSe23vil1Dmyramih6%2BvhSFFuNH5peA4znbr9tdV8NYEYoKOIQ4EKrXWBqE8Ct5UN%2B8PNIxJw5FXvbKwBFT7B5NU%2Fj%2FWvjkgFLqv8wG7RlHVvaw%3D%3D"}]} |
| nel | {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800} |
| permissions-policy | accelerometer=(), ambient-light-sensor=(), autoplay=(), camera=(), clipboard-read=(), clipboard-write=(), cross-origin-isolated=(), display-capture=(), document-domain=(), encrypted-media=(), execution-while-not-rendered=(), execution-while-out-of-viewport=(), fullscreen=(), gamepad=(), geolocation=(), gyroscope=(), hid=(), idle-detection=(), interest-cohort=(), magnetometer=(), microphone=(), midi=(), picture-in-picture=(), publickey-credentials-get=(), screen-wake-lock=(), sync-xhr=(), usb=(), web-share=(), xr-spatial-tracking=() |
| referrer-policy | no-referrer |
| x-frame-options | SAMEORIGIN |
| cf-ray | 9f939c8baa700e50-AMS |
| alt-svc | h3=":443"; ma=86400 |
Tech stack
CloudflareHTTP/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.widn.ai%2Fsitemap.xml
curl -s '/api/v1/http/headers?q=https%3A%2F%2Fwww.widn.ai%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