A method and system. Application programming interface (API) call data is analyzed for a user to identify a relationship between API input data and API output data of two or more API calls. API usage information is generated by utilizing a dependency between the two or more API calls. The API usage information includes information pertaining to how data flows between the two or more API calls. API provision is improved with respect to execution of a process, based on utilization of the API usage information. Improving API provision includes: receiving a specification of an improvement to be achieved for the process, selecting at least two APIs from the two or more APIs for achieving the improvement, generating a new API that combines the at least two APIs, and modifying the process by including the new API in the process and removing the at least two APIs from the process.