diff --git a/nginx/public_html/api.js b/nginx/public_html/api.js
index 74a55d5..7e68bac 100644
--- a/nginx/public_html/api.js
+++ b/nginx/public_html/api.js
@@ -3,7 +3,8 @@
 
 const api = {};
 
-let prefix = "/api";
+// not `/api` (relative to domain root) nor `//api` (results in https:///api/...)
+let prefix = "api";
 
 api.post = function(url, body){
   return m.request({