Function HasResponse()

VBScript

' Execute method if doesn't have response and get string response
If NOT Server("API Server").Method("GetBookById").HasResponse() Then
    Server("API Server").Method("GetBookById").Execute
End If

msgbox Server("API Server").Method("GetBookById").GetStringResponse()

JavaScript

// Execute method if doesn't have response and get string response
if (!Server("API Server").Method("GetBookById").HasResponse()) {
    Server("API Server").Method("GetBookById").Execute();
}

alert(Server("API Server").Method("GetBookById").GetStringResponse());