Thank you for your question,
in fact the APIs to access the SynchroniCity data is the same in all cities, since, service replicability is one of the main objectives.
You can find the APIs description here and information about the data here.
As you will see, the APIs are based on NGSI standandars, both for context information and historical data (time series), and OAuth 2.0 for security.
Luis / SynchroniCity team