Stable URLs
type: TechArticle
description: URLs are public contracts. Once published, they should keep working. Breaking them invalidates citations, bookmarks, links, and agent caches — and is almost always avoidable.
language: en
is part of: Web Specification Studio
author: Web Specification Studio
publisher: Web Specification Studio
license: https://creativecommons.org/licenses/by/4.0/
date modified: 2026-05-29T09:13:20.000Z
citation: Cool URIs don't change
  type: CreativeWork
  publisher: W3C — Tim Berners-Lee
citation: Is It Agent Ready?
  type: CreativeWork
  publisher: Is It Agent Ready?
citation: Google — Redirects and Search
  type: CreativeWork
  publisher: Google Search Central

Web Specification Studio
type: WebSite

Web Specification Studio
type: Organization

breadcrumb
type: BreadcrumbList
item list element: Home
  type: ListItem
  position: 1
  item: https://webspecification.com/
item list element: Spec
  type: ListItem
  position: 2
  item: https://webspecification.com/spec/
item list element: Agent Readiness
  type: ListItem
  position: 3
  item: https://webspecification.com/spec/agent-readiness/
item list element: Stable URLs
  type: ListItem
  position: 4
  item: https://webspecification.com/spec/agent-readiness/stable-urls/