The engine behind CityFlow is called CityPlatform - it is a serverless backend for collecting, analyzing and organizating data, devices etc. You can use our API to get information on various users, devices and measurements in our database.
It can be accessed using your personal API token (which can be found via the Settings page on CityFlow) or you can login programatically using our API to obtain a token for further API requests.
You can access the API documentation here:
If you lack some specific endpoints or language bindings for interacting with CityPlatform - let us know and we will add it to our development roadmap and our documentation! Write to firstname.lastname@example.org or use our live chat.