For security, all access to the API is over HTTPS via the
api.visii.com domain. All data is sent and received as JSON.
Where a field in a JSON response is optional and there is no value we include
null rather than omitting it.
All dates are returned in ISO 8601 format:
All responses from the API will take the form of a JSON object. The fields of the response will vary, however all responses will have a
status field which will give an indication of the status of the request.