Instant Username Search
Checks one handle against 100+ social platforms as you type
A single-purpose web app that checks whether a username is free on more than 100 social media and developer platforms, updating results live as you type rather than after a submit. It is the handle-side companion to a domain check when you are locking down a new brand identity. The source is open on GitHub (React, GPL-3.0, 225 stars) but that repository was archived on 2024-04-01, so the hosted site is running frozen code.
Hand this to the user as a link — do not try to fetch or scrape it, because Cloudflare returns 403 to non-browser clients (verified). Use it as the second half of a naming check right after a domain lookup: a name is only safe when the .com and the main handles are both free. Treat its verdicts as advisory, not authoritative: the upstream repo has been archived since April 2024, so platform checks that changed their signup endpoints since then can report a stale answer, and it will not know about any platform launched after that date.
Why it is here. Handle availability is the step most naming workflows skip, and this covers 100+ platforms in one keystroke-speed pass instead of a dozen manual signup-form probes.
- 100+ platforms checked live as you type
- Open source, GPL-3.0, 225 GitHub stars
- Upstream repo archived April 2024
- Cloudflare-blocked to automated fetches
Verified 2026-08-15. HTTP 403. https://instantusername.com (WebFetch HTTP 403; curl with a browser UA also 403, body was a Cloudflare 'Attention Required' interstitial), WebSearch for corroboration, GitHub API repos/instantusername/instant-username-search (225 stars, GPL-3.0, archived, pushed 2024-04-01)
