# What happens inside the Kubernetes API server?

DevFeed: [What happens inside the Kubernetes API server?](<https://devfeed.tech/articles/what-happens-inside-the-kubernetes-api-server-19134.md>)

Original publisher: [Read original article](<https://learnkube.com/kubernetes-api-explained>)

Author: Daniele Polencic

Published: 2026-01-26T00:00:00Z

Content type: tutorial

Language: en

Sources: [Learnk8s](<https://devfeed.tech/sources/learnk8s.md>)

Topics: [Kubernetes](<https://devfeed.tech/topics/kubernetes.md>), [API](<https://devfeed.tech/topics/api.md>), [Authentication](<https://devfeed.tech/topics/authentication.md>), [Authorization](<https://devfeed.tech/topics/authorization.md>), [OpenAPI Specification](<https://devfeed.tech/topics/openapi.md>)

Tags: [api](<https://devfeed.tech/tags/api.md>), [authentication](<https://devfeed.tech/tags/authentication.md>), [authorization](<https://devfeed.tech/tags/authorization.md>), [http](<https://devfeed.tech/tags/http.md>), [json](<https://devfeed.tech/tags/json.md>), [kubernetes](<https://devfeed.tech/tags/kubernetes.md>), [openapi](<https://devfeed.tech/tags/openapi.md>)

## AI overview

This tutorial explains how the Kubernetes API server processes requests. It covers the HTTP and REST interface, the OpenAPI schema, client-side validation, authentication, authorization, and the request path toward etcd.

## Source excerpt

The Kubernetes API server handles all requests to your cluster. But how does it actually work? Learn how requests flow through authentication, authorization, admission controllers, and into etcd.