Contact

Email contact@headercheckr.com for product feedback, content corrections, partnership questions, or general support.

If you found a confusing result, include the public domain you checked and what looked wrong. Please do not send passwords, API keys, private headers, or confidential scan data.

Use contact@headercheckr.com if you need to report abuse, a security concern related to HeaderCheckr, or content that should be corrected quickly.

HeaderCheckr is built for public website checks only. Do not use the tools against private systems or sites you do not have permission to test.

Messages are reviewed as time allows. Clear reports with the affected URL, expected result, and actual result are easier to investigate.

For urgent issues on your own website, contact your hosting provider, CDN, or security team as well.