X Username Search
socialPublic profile detection specification and footprint signals
Profile URL Pattern
https://api.x.com/i/users/username_available.json?username={account}The target username is substituted for the {account} parameter during automated public HTTP evaluation.
Detection Logic & Fingerprint
Checks X public profile URLs by verifying HTTP response status and unique platform profile indicators.
Confidence Tier:high
False Positives & Limitations
False positives can occur if the platform shows a generic landing page or CAPTCHA challenge instead of a proper 404 status.
Manual Verification Instructions
Always visit the live URL manually on X to inspect profile activity and bio markers before drawing conclusions.
Audit X and 700+ Other Sites
Enter a username below to test X alongside all cataloged public networks in parallel.