The present disclosure relates to controlling communication between various applications or integrating various applications using interaction patterns. Interaction pattern data, which defines multiple roles for an interaction pattern is generated. Each role is associated with a transaction and is a source or target of a transaction. A transaction is performed using an application programming interface (API). A role can be a provider, or a consumer of the API based on whether the role is a source or target of the transaction. Application conformance data, which defines a set of roles implemented by the application is generated. An application is permitted to invoke an API of another application, if the application implements a first role and the other application implements a second role, and the first role and the second role are a source and target, respectively, of a transaction performed using the API.