Sharepoint - SharePoint online REST: Get users profile properties
Still this no API for retrieving all user profiles from SharePoint Online
You can get current user's profile
_api/SP.UserProfiles.PeopleManager/GetMyProperties
Or a particular user's profile by login name
/_api/SP.UserProfiles.PeopleManager/GetPropertiesFor(accountName=@v)?@v='i:0%23.f|membership|[email protected]'
BUT You can get available user profiles in a site
/_vti_bin/ListData.svc/UserInformationList