Sdui Platform API
The production JSON API behind the Sdui school-communication platform, serving the Sdui web app, the iOS/Android clients and the WebUntis messenger integration. Every resource path probed (/v1/users, /v1/schools) answers HTTP 401 with a German-language envelope, and an unauthenticated WWW-Authenticate: Bearer challenge is returned. Sdui publishes no OpenAPI, no API reference and no developer portal; the surface below is recorded from live unauthenticated probes only.