Roblox RegisterIndependent record of Roblox groups · not affiliated with Roblox Corporation

Developer API

A free, read-only JSON API over the register. Everything here is a measured value, never estimated. No key or sign-up — just GET. If you build on it, credit roregister.com with a link.

Endpoints

GET /api/v1 — Machine-readable index of the API. try →

GET /api/v1/group/{id} — Measured record for one group. try →

GET /api/v1/user/{id} — Measured record for one user. try →

GET /api/v1/game/{id} — One experience by universe id. try →

GET /api/v1/item/{id} — One catalogue item by asset id. try →

GET /api/v1/largest?limit=N — Largest groups (limit ≤ 200). try →

GET /api/v1/stats — Register-wide measured totals. try →

GET /group/{id}/history.json — A group’s full member/name/ownership history. try →

GET /user/{id}/usernames.json — A user’s observed username history. try →

Rules of the road

  • Rate limit: 60 requests/minute per IP (bulk CSV downloads are stricter). A 429 carries Retry-After.
  • CORS: open (Access-Control-Allow-Origin: *), GET and OPTIONS only.
  • Caching: responses set Cache-Control; please respect it and cache rather than re-poll.
  • Shape: IDs are numeric and stable; a record you cannot find returns 404 with a JSON error.
  • Attribution: reuse freely with a credit link to roregister.com. Not affiliated with Roblox Corporation.

Bulk data

For whole-population exports rather than single records, see the bulk CSV downloads. For change notifications, see the feeds.