WordPress at a glance
action is not described

xmlrpc_publish_post action-hook . WP 2.1.0

Fires when _publish_post_hook() is called during an XML-RPC request.

Usage

add_action( 'xmlrpc_publish_post', 'action_function_name_3808' );
function action_function_name_3808( $post_id ){
	// action...
}
$post_id(int)
Post ID.

Where the hook is called

_publish_post_hook()
wp-includes/post.php 6263
do_action( 'xmlrpc_publish_post', $post_id );

Where the hook is used (in WP core)

Does not used.