'GET', 'callback' => 'poc_endpoint', 'permission_callback' => '__return_true', ) ); } ); function poc_endpoint( $request ) { // Output should match input get_params(); return $request->get_params(); } add_action( 'wp_enqueue_scripts', function () { wp_enqueue_script( 'wp-url' ); wp_enqueue_script( 'wp-api-fetch' ); } ); add_action( 'wp_print_footer_scripts', function() { ?>