openheaders.com
openheaders.com is a live English-language website hosted on Cloudflare, Inc. (AS13335) in the United States, served by Cloudflare. cl0q first saw it on 2026-08-21 and last crawled it on 2026-08-21. It resolves to 104.21.39.236 and has mail (MX) records set up. Its favicon is fingerprinted by SHA-256, so you can find every other site that serves the same icon.
How the site describes itself:
OpenHeaders — your web devtoolkit inside a browser extension
HTTP rules, mocks, and a full API client — front-end and back-end in one install. Works offline, syncs across surfaces. No account, no cloud, no personal data.
| Status | 200 OK — live & indexed by cl0q |
|---|---|
| First seen | 2026-08-21 |
| Last crawled | 2026-08-21 |
| IPv4 | 104.21.39.236 |
| IPv6 | 2606:4700:3037::ac43:abd7 |
| Network | AS13335 Cloudflare, Inc. · United States |
| Mail (MX) | eu1-smtp.messagingengine.com,eu2-smtp.messagingengine.com |
| Language | en |
| Server | cloudflare |