diff --git a/DigitalData.Core.Exceptions.Middleware/GlobalExceptionHandlerOptions.cs b/DigitalData.Core.Exceptions.Middleware/GlobalExceptionHandlerOptions.cs
index 239425b..d051d96 100644
--- a/DigitalData.Core.Exceptions.Middleware/GlobalExceptionHandlerOptions.cs
+++ b/DigitalData.Core.Exceptions.Middleware/GlobalExceptionHandlerOptions.cs
@@ -1,14 +1,12 @@
-using System.Net;
-
-namespace DigitalData.Core.Exceptions.Middleware;
+namespace DigitalData.Core.Exceptions.Middleware;
 
 public class GlobalExceptionHandlerOptions
 {
-    private readonly Dictionary<Type, HttpResponse> _registeredExceptions = new();
+    private readonly Dictionary<Type, HttpExceptionMapping> _registeredMappings = new();
 
-    public GlobalExceptionHandlerOptions RegisterException<TException>(HttpStatusCode statusCode, string? message = null) where TException : Exception
+    public GlobalExceptionHandlerOptions Add(HttpExceptionMapping mapping)
     {
-        _registeredExceptions[typeof(TException)] = new HttpResponse(statusCode, message);
+        _registeredMappings[mapping.ExceptionType] = mapping;
         return this;
     }
 }
\ No newline at end of file
diff --git a/DigitalData.Core.Exceptions.Middleware/HttpExceptionMapping.cs b/DigitalData.Core.Exceptions.Middleware/HttpExceptionMapping.cs
new file mode 100644
index 0000000..e87c45c
--- /dev/null
+++ b/DigitalData.Core.Exceptions.Middleware/HttpExceptionMapping.cs
@@ -0,0 +1,9 @@
+using System.Net;
+
+namespace DigitalData.Core.Exceptions.Middleware;
+
+public record HttpExceptionMapping(Type ExceptionType, HttpStatusCode StatusCode, Func<Exception, string>? MessageFactory = null)
+{
+    public static HttpExceptionMapping Create<TException>(HttpStatusCode statusCode, Func<Exception, string>? messageFactory = null) where TException : Exception
+        => new HttpExceptionMapping(typeof(TException), statusCode, messageFactory);
+};
\ No newline at end of file
diff --git a/DigitalData.Core.Exceptions.Middleware/HttpResponse.cs b/DigitalData.Core.Exceptions.Middleware/HttpResponse.cs
deleted file mode 100644
index 37002ea..0000000
--- a/DigitalData.Core.Exceptions.Middleware/HttpResponse.cs
+++ /dev/null
@@ -1,5 +0,0 @@
-using System.Net;
-
-namespace DigitalData.Core.Exceptions.Middleware;
-
-public record HttpResponse(HttpStatusCode StatusCode, string? Message = null);
\ No newline at end of file