Zero is a scootersharing company based in Germany.
There is no authentication or special headers and only GET-Requests required for the API-Endpoint https://zero.frontend.fleetbird.eu/api/prod/v1.06/. You can request all(?) vehicles with https://zero.frontend.fleetbird.eu/api/prod/v1.06/map/cars/ or filter them by bbox like https://zero.frontend.fleetbird.eu/api/prod/v1.06/map/cars/?lat1=46.8339&lat2=55.829&lon1=4.205&lon2=27.653 or show the 20 nearest vehicles around a location with https://zero.frontend.fleetbird.eu/api/prod/v1.06/cars/?lat=53.4374&lon=9.9955.
Polygons with regions and parking restrictions are available on https://zero.frontend.fleetbird.eu/api/prod/v1.06/territories/all/ (type: 0 looks like free floating region and type: 1 are no parking zones).
Vehicle types with images are available on https://zero.frontend.fleetbird.eu/api/prod/v1.06/cars/types/