diff --git a/jeeutil/src/main/java/de/muehlencord/shared/jeeutil/restexfw/APIErrorResponse.java b/jeeutil/src/main/java/de/muehlencord/shared/jeeutil/restexfw/APIErrorResponse.java
index 99f0c98..b063af5 100644
--- a/jeeutil/src/main/java/de/muehlencord/shared/jeeutil/restexfw/APIErrorResponse.java
+++ b/jeeutil/src/main/java/de/muehlencord/shared/jeeutil/restexfw/APIErrorResponse.java
@@ -34,29 +34,44 @@ import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
 public class APIErrorResponse {
 
     @XmlJavaTypeAdapter(ResponseStatusAdapter.class)
-    private Response.Status status;
-    private String errorCode;
-    private String message;
-
-    public APIErrorResponse() {
-    }
+    private final Response.Status status;
+    private final String errorCode;
+    private final String message;
+    private final Throwable rootCause;
 
     public APIErrorResponse(APIError apiError, Locale locale) {
         this.status = apiError.getStatus();
         this.errorCode = apiError.getErrorCode();
         this.message = getLocalizedMessage(apiError, locale);
+        this.rootCause = null;
+    }
+
+    public APIErrorResponse(APIError apiError, Locale locale, Throwable th) {
+        this.status = apiError.getStatus();
+        this.errorCode = apiError.getErrorCode();
+        this.message = getLocalizedMessage(apiError, locale);
+        this.rootCause = th;
     }
 
     public APIErrorResponse(Exception exception, Locale locale) {
         this.status = Response.Status.INTERNAL_SERVER_ERROR;
         this.errorCode = "0";
         this.message = exception.getLocalizedMessage();
+        this.rootCause = null;
+    }
+
+    public APIErrorResponse(Exception exception, Locale locale, Throwable th) {
+        this.status = Response.Status.INTERNAL_SERVER_ERROR;
+        this.errorCode = "0";
+        this.message = exception.getLocalizedMessage();
+        this.rootCause = th;
     }
 
     public APIErrorResponse(Response.Status status, String errorCode, String messageKey, Locale locale) {
         this.status = status;
         this.errorCode = errorCode;
         this.message = getLocalizedMessage(messageKey, locale);
+        this.rootCause = null;
     }
 
     public String getErrorCode() {
@@ -71,6 +86,10 @@ public class APIErrorResponse {
         return this.message;
     }
 
+    public Throwable getRootCause() {
+        return rootCause;
+    }
+
     private String getLocalizedMessage(APIError apiError, Locale locale) {
         ResourceBundle resourceBundle = ResourceBundle.getBundle(apiError.getClass().getName(), locale);
         return resourceBundle.getString(apiError.getMessageKey());
diff --git a/jeeutil/src/main/java/de/muehlencord/shared/jeeutil/restexfw/APIException.java b/jeeutil/src/main/java/de/muehlencord/shared/jeeutil/restexfw/APIException.java
index 25effd8..3f30358 100644
--- a/jeeutil/src/main/java/de/muehlencord/shared/jeeutil/restexfw/APIException.java
+++ b/jeeutil/src/main/java/de/muehlencord/shared/jeeutil/restexfw/APIException.java
@@ -18,6 +18,7 @@ package de.muehlencord.shared.jeeutil.restexfw;
 
 import java.util.Locale;
 import javax.ws.rs.core.Response;
+import javax.ws.rs.core.Response.ResponseBuilder;
 
 /**
  *
@@ -27,12 +28,17 @@ public class APIException extends RuntimeException {
 
     public static final String HTTP_HEADER_X_ERROR = "X-Error";
     public static final String HTTP_HEADER_X_ERROR_CODE = "X-Error-Code";
+    public static final String HTTP_HEADER_X_ROOT_CAUSE = "X-Root-Cause";
 
     private final Response httpResponse;
 
     public APIException(APIError apiError, Locale locale) {
         httpResponse = createHttpResponse(new APIErrorResponse(apiError, locale));
     }
+    
+    public APIException(APIError apiError, Locale locale, Throwable th) {
+        httpResponse = createHttpResponse(new APIErrorResponse(apiError, locale, th));
+    }    
 
     public APIException(Exception exception, Locale locale) {
         httpResponse = createHttpResponse(new APIErrorResponse(exception, locale));
@@ -43,9 +49,15 @@ public class APIException extends RuntimeException {
     }
 
     private static Response createHttpResponse(APIErrorResponse response) {
-        return Response.status(response.getStatus()).entity(response)
+        ResponseBuilder builder = Response.status(response.getStatus()).entity(response)
                 .header(HTTP_HEADER_X_ERROR, response.getMessage())
-                .header(HTTP_HEADER_X_ERROR_CODE, response.getErrorCode()).build();
+                .header(HTTP_HEADER_X_ERROR_CODE, response.getErrorCode());
+        
+        if (response.getRootCause() != null) {
+            builder = builder.header(HTTP_HEADER_X_ROOT_CAUSE, builder);
+        }
+
+        return builder.build();
     }
 
 }