The present disclosure generally relates to a software application runtime having dynamic evaluation functions and parameters. A dynamic evaluation engine of an application's runtime accepts evaluation requests from methods of a software application. A request can be associated with an identifier for a method of the software application. The method identifier can be associated with one or more dynamic evaluation functions having one or more dynamic evaluation parameters. When the dynamic evaluation engine receives a request from an application method, the dynamic evaluation engine can determine the one or more current dynamic evaluation functions or parameters to use with the request. The dynamic evaluation engine can return an evaluation result to the method. The dynamic evaluation engine can be in communication with a repository, such as a central repository, providing a unique mechanism to look up dynamic evaluation functions and parameters, which can be imported into the application's runtime.