Managed application programming interfaces (APIs), schemas and procedures receives a managed API call from an application, and maps the managed API call to an unmanaged API call. Managed data types and managed data objects of the managed API call are mapped to corresponding unmanaged data types and data objects. A request resulting from the unmanaged API call is dispatched to and interpreted by an unmanaged programming language interpreter, which executes the request in an unmanaged programming language. An unmanaged response to the request is mapped to a corresponding managed response, which is provided to the managed application.