wordpress posts api shows blank page when called from external site - wordpress

Question

Ok so my work wants one of our websites to pull posts from another one of our wordpress website.
I found this endpoint and when I throw it in a browser or in post man I get the data no problem.
However when I do a basic curl request from my external website and echo the results it shows a blank page. The request is a 200 ok but no data showing?
$curl = curl_init();
curl_setopt_array($curl, array
(
CURLOPT_URL => 'https://www.hidden.com/wp-json/wp/v2/posts',
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => '',
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 0,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => 'POST',
CURLOPT_POSTFIELDS => array('title' => 'Sample Post','status' => 'publish'),
));
$response = curl_exec($curl);
curl_close($curl);
echo $response;
I thought maybe I needed to be on https since this was on the local server but when pushed to secure dev server same issue.
Then I thought maybe I need to authenticate so I tried this:
$username='hiddenusr';
$password='hiddenpass';
$URL='https://www.hidden.com/wp-json/wp/v2/posts';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$URL);
curl_setopt($ch, CURLOPT_TIMEOUT, 30); //timeout after 30 seconds
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
curl_setopt($ch, CURLOPT_USERPWD, "$username:$password");
$result=curl_exec ($ch);
echo $result;
$status_code = curl_getinfo($ch, CURLINFO_HTTP_CODE); //get status code
curl_close ($ch);
still nothing? What am I doing wrong? and why work in postman but not on my site?