Abstract: A dynamic workflow-based composite web service system and method for the creation and definition of a web service, its properties, methods, and functions through the combination of an event trigger which defines the web service endpoint, actor classes which defines the service's properties and metadata, and a workflow which defines its methods and functions. The dynamic workflow-based composite web service system and method generally includes one or more web service endpoints (the URL where the service can be accessed by a client application), an event trigger defined for each endpoint, actors which define the properties and metadata of the service, and a workflow which receives input from the endpoint, returns the result of the process, and defines the web service functions and methods.