Get AnsPress questions using WP REST api

rest-questions.php

<?php

// If this file is called directly, abort.
if ( ! defined( 'WPINC' ) ) {
	die;
}

/**
 * The version 1 endpoint for AnsPress questions.
 */
class My_REST_Questions {
	/**
	 * Generate results for the /wp-json/anspress/v1/questions route.
	 *
	 * @param  \WP_REST_Request $request Full details about the request.
	 * @return \WP_REST_Response|\WP_Error The response for the request.
	 */
	public static function get_items( \WP_REST_Request $request ) {
		$params = $request->get_params();

		$query = ap_get_questions(
			array(
				'showposts'   => 20,
			)
		);

		$questions = [];

		while ( $query->have_posts() ) :
			$query->the_post();
			$questions[] = get_post();
		endwhile;

		$resp = rest_ensure_response( $questions );

		$resp->header( 'X-WP-Total', (int) $query->found_posts );
		$resp->header( 'X-WP-TotalPages', (int) $query->max_num_pages );

		return $resp;
	}
}