For Developers
Free X shadowban API for developers
A free JSON endpoint for X profile data and shadowban results, plus an embeddable SVG badge. No key needed.
JSON API
GET visiuun.com/fsb/?api={username}
Same engine
The four tests and confirmation logic the site uses.
SVG badge
GET visiuun.com/fsb/badge/{username}.svg
Cached
Recent results are served from cache; live checks are rate-limited.
Endpoints
GET https://visiuun.com/fsb/?api={username}: profile, test results, history and recent posts as JSON. Full reference in the API docs.GET https://visiuun.com/fsb/badge/{username}.svg: a small status badge, cached for 30 minutes. See the badge page for embed code.GET https://visiuun.com/fsb/card/{username}.jpg: the 1200×630 share image for a profile.
Fair use
The API is rate-limited per IP. Cache results on your side; a profile does not change every minute. Results come from public data seen logged out; FSB is not affiliated with X.
Check an account
Four live tests from a logged-out view. No password, no app permissions.
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