UFAQ - REST API Example

function register_api_endpoints() {

    $args = array(
        'methods'   => 'GET',
        'callback'  => array( $this, 'get_faqs' )
    );

    register_rest_route( 'your-app-path/v1', '/faqs/', $args );
}

add_action( 'rest_api_init', 'register_api_endpoints' );

function get_faqs() {

    $args = array(
        'posts_per_page'    => -1,
        'orderby'           => 'date',
        'post_type'         => 'ufaq',
    );

    $faqs = get_posts( $args );

    return $faqs;
}