diff --git a/htdocs/api/index.php b/htdocs/api/index.php
index e55a30304a4..6788b208a2e 100644
--- a/htdocs/api/index.php
+++ b/htdocs/api/index.php
@@ -88,17 +88,22 @@ if (preg_match('/api\/index\.php\/explorer/', $_SERVER["PHP_SELF"]) && ! empty($
 // index.php/xxx                                called by any REST client to run API
 
 
+$reg=array();
 preg_match('/index\.php\/([^\/]+)(.*)$/', $_SERVER["PHP_SELF"], $reg);
 // .../index.php/categories?sortfield=t.rowid&sortorder=ASC
 
 
 // Set the flag to say to refresh (when we reload the explorer, production must be for API call only)
-$refreshcache=false;
+/*$refreshcache=false;
 if (! empty($reg[1]) && $reg[1] == 'explorer' && ($reg[2] == '/swagger.json' || $reg[2] == '/swagger.json/root' || $reg[2] == '/resources.json' || $reg[2] == '/resources.json/root'))
 {
     $refreshcache=true;
-}
-
+}*/
+// When in production mode, a file api/temp/routes.php is created with the API available of current call. 
+// But, if we set $refreshcache to false, so it may have only one API in the routes.php file if we make a call for one API without
+// using the explorer. And when we make another call for another API, the API is not into the api/temp/routes.php and a 404 is returned. 
+// So we force refresh to each call.
+$refreshcache=true;
 
 $api = new DolibarrApi($db, '', $refreshcache);
 //var_dump($api->r->apiVersionMap);
@@ -115,7 +120,7 @@ UploadFormat::$allowedMimeTypes = array('image/jpeg', 'image/png', 'text/plain',
 
 
 
-// Call Explorer file for all APIs definitions
+// Call Explorer file for all APIs definitions (this part is slow)
 if (! empty($reg[1]) && $reg[1] == 'explorer' && ($reg[2] == '/swagger.json' || $reg[2] == '/swagger.json/root' || $reg[2] == '/resources.json' || $reg[2] == '/resources.json/root'))
 {
     // Scan all API files to load them
@@ -253,5 +258,6 @@ if (! empty($reg[1]) && ($reg[1] != 'explorer' || ($reg[2] != '/swagger.json' &&
 //var_dump($api->r->apiVersionMap);
 //exit;
 
-// Call API (we suppose we found it)
+// Call API (we suppose we found it).
+// The handle will use the file api/temp/routes.php to get data to run the API. If the file exists and the entry for API is not found, it will return 404.
 $api->r->handle();