# Changelogs
  
  ## Info
  
  The monitoring service records changelogs for alarm statuses. Changelogs are accessible as a Time Series Collection. By default the API queries the last 7 days of changelog information.
  
  ## Working with Changelogs
  ```php
  $changelog = $service->getChangelog();
  
  foreach ($changelog as $item) {
     $entity = $item->getEntityId();
  }
  ```