API call

Hello,

I am trying to make simple API call on my WordPress site using the following instructions here (http://www.tourcms.com/support/api/mp/code/library_php.php)

This is so I can retrieve tour information back into my webiste. I’ve got to the point where the test.php is working but I’m struggling to get the code working. I added thhe code below to my functions.php which returned an empty page ….?Please help

add_action('inside_top_theloop', 'tourcms_custom_content');
			function tourcms_custom_content(){
				if (is_singular( 'holiday' ) ) {
				include 'http://mywebsite.com/tourcms.php';
				include 'http://mywebsite.com/config.php';
				$tourcms = new TourCMS($marketplace_account_id, $api_private_key, "simplexml");
				?><div>This is some data using API</div>
				<?php $result = $tourcms->api_rate_limit_status($channel_id);
				print  'Remaining hits: '.$result->remaining_hits;?>

					<?php }
}