diff --git a/clientapi/routing/sendevent.go b/clientapi/routing/sendevent.go
index 47ad1882..da96c5c6 100644
--- a/clientapi/routing/sendevent.go
+++ b/clientapi/routing/sendevent.go
@@ -77,6 +77,7 @@ func SendEvent(
 		util.GetLogger(req.Context()).WithError(err).Error("producer.SendEvents failed")
 		return jsonerror.InternalServerError()
 	}
+	util.GetLogger(req.Context()).WithField("event_id", eventID).Info("Sent event")
 
 	res := util.JSONResponse{
 		Code: http.StatusOK,
diff --git a/common/httpapi.go b/common/httpapi.go
index 59b303b6..22c77447 100644
--- a/common/httpapi.go
+++ b/common/httpapi.go
@@ -25,6 +25,10 @@ func MakeAuthAPI(
 		if err != nil {
 			return *err
 		}
+		// add the user ID to the logger
+		logger := util.GetLogger((req.Context()))
+		logger = logger.WithField("user_id", device.UserID)
+		req = req.WithContext(util.ContextWithLogger(req.Context(), logger))
 
 		return f(req, device)
 	}