epd-example-rest-request.php

<?php

$args = array (
    'method' => 'POST',
    'body'   => array (
        'epd_first_name' => 'Joe',
        'epd_last_name'  => 'Blogs',
        'epd_email'      => 'someone@email.com',
        'demo_ref'       => '310a345749514f0412adabwxfe6ee7f4',
        'remote_phrase'  => '91f6fd676fcc6ba2b537ac278ecc83da',
    ),
    'headers' => array (
        'phrase' => '17e0749dws98d0764646291545412481f',
    )
);

$response = wp_remote_post(
    'https://yourawesomesite.com/wp-json/epd/v1/epd_sites',
    $args
);