---
description: Durable Objects reference documentation covering migrations, data location, security, environments, and more.
title: Reference
image: https://developers.cloudflare.com/og-docs.png
---

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> Documentation Index  
> Fetch the complete documentation index at: https://developers.cloudflare.com/durable-objects/llms.txt  
> Use this file to discover all available pages before exploring further.

# Reference

Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/durable-objects/reference/index.md)|[Agent setup](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/agent-setup/)

* [In-memory state in a Durable Object](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/durable-objects/reference/in-memory-state/)
* [Durable Object class exports](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/durable-objects/reference/durable-objects-migrations/)
* [Data security](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/durable-objects/reference/data-security/)
* [Data location](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/durable-objects/reference/data-location/)
* [Environments](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/durable-objects/reference/environments/)
* [Gradual Deployments](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/workers/versions-and-deployments/gradual-deployments/#gradual-deployments-for-durable-objects)
* [FAQs](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/durable-objects/reference/faq/)
* [Glossary](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/durable-objects/reference/glossary/)
* [Durable Object class migrations (legacy)](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/durable-objects/reference/durable-object-class-migrations-legacy/)

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