Trigger an event on specific URL

functions.php

<?php

// add this to your functions.php in your child theme

add_action( 'the_post', 'trigger_my_page_view' );
function trigger_my_page_view(){
  // check if is single to avoid archive
	if( is_single() && 'https://mydomain/path/' == get_the_permalink() ){
		do_action( 'trigger_slack_event' ); // can be anything you feel like.
	}
}