createProperties creates a property and its rooms with some basic settings, and returns the new property and room id codes.
Authentication, the request format and sample data are the same for all JSON methods. See JSON API Methods.
Tip: Set a prop key for the property when you create it, so you can access it later via API. See Create properties.
Note: API V1 is deprecated and won't be developed further. For new projects, use API V2.