How to unite all taxi services on the mob from the program point. applications?

Question

Android

Taximeta.ru has recently been released , which unites all taxi services in Russia (uber, get, Yandex taxi)
I don’t understand how you can combine information for each service? Their program code is hardwired into the mobile application and there are no API interfaces for requests from third-party applications. How was it possible from a technical/programmatic point of view?

Answer 1

Well:
1) api (any services have it, just not public)
2) parsing

Answer 2

There is only one universal solution for combining any services - each service is individually worked out and connected.