diff --git a/core/api.go b/core/api.go
index 8e2950a..116ae3b 100644
--- a/core/api.go
+++ b/core/api.go
@@ -421,6 +421,12 @@ func (caller apiCaller) serviceAPI(w http.ResponseWriter, r *http.Request) error
 			return nil
 		}
 
+		if len(service.ServerApiTokens) == 0 {
+			service.ServerApiTokens = []primitive.ObjectID{
+				primitive.NewObjectID(),
+			}
+		}
+
 		filter := bson.M{"_id": service.Id}
 		if len(service.ServiceCode) == 0 {
 			service.ServiceCode = hex.EncodeToString(service.Id[6:])