diff --git a/webservice/webservice.py b/webservice/webservice.py
index 21be9373c3c44ad5a4ec52b34821f2a63dc3b54d..836829118b8d9c14eeaa376711d22e6192050829 100644
--- a/webservice/webservice.py
+++ b/webservice/webservice.py
@@ -752,10 +752,19 @@ class ActionsServer:
         'query-rid',
         'upload-yaml',
         'update_conf',
+        'check_connection',
     }
 
     # Handler methods for each available action ------------------------------
 
+    async def handle_check_connection(self, *args):
+        """Inform the caller that the service is up and running.
+
+        MyMDC will send the same information as provided to dark or correct
+        requests, but nothing is done with this information.
+        """
+        return b'success'
+
     async def handle_correct(
             self, rid, _sase, instrument, cycle, proposal, runnr, priority
     ):