WordPress Speed Up Service | WordPress Website Maintenance Packages Reply To: Why admin ajax file loads to frontend ?, by Dipak C. Gajjar Are you using WooCommerce? Introduced in WordPress 3.6 the WordPress Heartbeat API allows WordPress to communicate between the web-browser and the server. It allows for improved user session management, revision tracking, and auto saving. The WordPress Heartbeat API uses /wp-admin/admin-ajax.php to run AJAX calls from the web-browser. If you want, you can disable it using a Heartbeat Control plugin. Reply To: Why admin ajax file loads to frontend ?