---
updatedAt: 2026-04-20T19:19:56.000Z
agentTools:
  siteIndex: https://techdocs.akamai.com/llms.txt
  projectIndex: https://techdocs.akamai.com/edge-hostnames/llms.txt
---

# 401

[401.](https://httpstatuses.com/401) Authentication failure.

# Sibling pages

* [400](https://techdocs.akamai.com/edge-hostnames/reference/400.md)
* [403](https://techdocs.akamai.com/edge-hostnames/reference/403.md)
* [404](https://techdocs.akamai.com/edge-hostnames/reference/404.md)
* [405](https://techdocs.akamai.com/edge-hostnames/reference/405.md)
* [408](https://techdocs.akamai.com/edge-hostnames/reference/408.md)
* [415](https://techdocs.akamai.com/edge-hostnames/reference/415.md)
* [429](https://techdocs.akamai.com/edge-hostnames/reference/429.md)
* [500](https://techdocs.akamai.com/edge-hostnames/reference/500.md)
* [502](https://techdocs.akamai.com/edge-hostnames/reference/502.md)
* [503](https://techdocs.akamai.com/edge-hostnames/reference/503.md)