The Delivery API uses Fastly as its Content Delivery Network (CDN). The CDN stores responses to every successful API request in the CDN's cache.Your first request to the Delivery API is uncached. It goes through the CDN directly to the Delivery API, and the response is then stored in the CDN. If you repeat the same request, you get a cached response from the CDN.The response stays in the cache for as long as the requested content in your Kontent.ai environment stays the same. If the content changes, the cached response is removed from the cache.For example, if you request a content item A from the API, you get an API response with the contents of content item A and its linked items. The API response with content item A is cached in the CDN. If you change content item A, the cached API response is removed from the cache. If the CDN had previously cached other responses containing content of content item A, these responses would have also been removed from the cache.