How it works
FSB looks at an account the way strangers and search engines see it: logged out. It checks whether posts appear in search, whether the account appears in search suggestions, whether replies stay visible in threads, and whether replies get pushed behind "Show more replies". It also reports the sensitive media flag, shows public stats and recent posts, and keeps a history of every check. More on the method.
What it never does
- Ask for your X password or app permissions.
- Show anything that is not visible to a logged-out visitor.
- Report a restriction from a single failed request. New results are re-tested first.
Limits
No outside tool can read X's internal flags. FSB measures their visible effects, and says "unknown" when X does not answer.
Contact
Questions, removal requests and bugs: @visiuun. Service health is on the status page; changes are on the changelog. FSB is not affiliated with X Corp.