Get content and send to 3rd party

absolutely it is possible.

function add_property_import_meta_box()
{
    add_meta_box('property-import-images', 'Property Actions', 'function_import_images_metabox', 'property', 'side', 'high');
}

add_action('add_meta_boxes', 'add_property_import_meta_box');

function function_import_images_metabox($post)
{
    // Noncename needed to verify where the data originated
    echo '<input type="hidden" name="property_actions_nonce" id="property_actions_nonce" value="' .
        wp_create_nonce( plugin_basename(__FILE__) ) . '" />';

    ?>
    <p><a href="https://wordpress.stackexchange.com/wp-admin/admin.php?page=actionhere" class="button button-primary button-large">Second Action</a></p>
    <p><a href="https://wordpress.stackexchange.com/wp-admin/admin.php?page=actionhere" class="button button-primary button-large">Third Action</a></p>


<?php }

More info
https://developer.wordpress.org/reference/functions/add_meta_box/