An example of a public endpoint in cockpit

testing.php

<?php

// Place this file at config/api/public/testing.php
// Replace `mycollection` with the name of one of your collections
// Access it at http://yoursite.com/api/public/testing?myarg=testing

try {
  $arg = $this->param('myarg')
  $items = cockpit('collections')->find('mycollection', ['limit' => 10]);
  return ['arg' => $arg, 'items' => $items];
} catch (\Throwable $th) {
    return ['error' => $th->getMessage() . "\n" . $th->getTraceAsString()];
}