Implementations of computer-implemented methods include retrieving a plurality of web services, displaying a plurality of user interfaces, each user interface corresponding to one of the plurality of web services, receiving a first user input indicating an interaction element of a first user interface of the plurality of user interfaces, indicating one or more interaction elements of a second user interface of the plurality of user interfaces based on the first user input, receiving a second user input indicating a selection of one of the one or more interaction elements of the second user interface, automatically generating a dataflow between the interaction element of the first user interface and the one of the one or more interaction elements of the second user interface in response to receiving the second user input, and modeling the application based on the dataflow.