diff --git a/htdocs/api/class/api_documents.class.php b/htdocs/api/class/api_documents.class.php
index 07f124741fe..66c293f2cb0 100644
--- a/htdocs/api/class/api_documents.class.php
+++ b/htdocs/api/class/api_documents.class.php
@@ -356,6 +356,22 @@ class Documents extends DolibarrApi
 
 			$upload_dir = $conf->facture->dir_output . "/" . get_exdir(0, 0, 0, 1, $object, 'invoice');
 		}
+		else if ($modulepart == 'agenda' || $modulepart == 'action' || $modulepart == 'event')
+		{
+			require_once DOL_DOCUMENT_ROOT.'/comm/action/class/actioncomm.class.php';
+
+			if (!DolibarrApiAccess::$user->rights->agenda->myactions->read && !DolibarrApiAccess::$user->rights->agenda->allactions->read) {
+				throw new RestException(401);
+			}
+
+			$object = new ActionComm($this->db);
+			$result=$object->fetch($id, $ref);
+			if ( ! $result ) {
+				throw new RestException(404, 'Event not found');
+			}
+
+			$upload_dir = $conf->agenda->dir_output.'/'.dol_sanitizeFileName($object->ref);
+		}
 		else
 		{
 			throw new RestException(500, 'Modulepart '.$modulepart.' not implemented yet.');