diff --git a/commafeed-server/src/main/java/com/commafeed/frontend/resource/FeedREST.java b/commafeed-server/src/main/java/com/commafeed/frontend/resource/FeedREST.java
index cd4f1efa..718ad07a 100644
--- a/commafeed-server/src/main/java/com/commafeed/frontend/resource/FeedREST.java
+++ b/commafeed-server/src/main/java/com/commafeed/frontend/resource/FeedREST.java
@@ -272,8 +272,9 @@ public class FeedREST {
 		try {
 			info = fetchFeedInternal(req.getUrl());
 		} catch (Exception e) {
+			Throwable cause = Throwables.getRootCause(e);
 			return Response.status(Status.INTERNAL_SERVER_ERROR)
-					.entity(Throwables.getStackTraceAsString(Throwables.getRootCause(e)))
+					.entity(cause.getClass().getName() + ": " + cause.getMessage())
 					.type(MediaType.TEXT_PLAIN)
 					.build();
 		}