> ## Documentation Index
> Fetch the complete documentation index at: https://arizeai-433a7140.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Daytona

> Run Phoenix code evaluators in Daytona's managed development sandboxes.

<img src="https://storage.googleapis.com/arize-phoenix-assets/assets/svgs/daytona.svg" alt="Daytona" style={{ height: '64px' }} />

[**Daytona**](https://www.daytona.io/) provides managed development sandboxes with fast, snapshot-based startup. Phoenix uses Daytona as a hosted backend for both Python and TypeScript [code evaluators](/docs/phoenix/evaluation/server-evals/code-evaluators) that need stronger isolation than the local sandboxes, longer maximum timeouts, or runtime dependency installation.

## Configure

1. Sign up at [daytona.io](https://www.daytona.io/) and generate an API key.
2. Add it as `DAYTONA_API_KEY` from **Settings → Sandboxes**.

See [Settings → Sandboxes → Daytona](/docs/phoenix/settings/sandboxes/daytona) for full configuration details and [Sandbox Backends](/docs/phoenix/self-hosting/features/sandbox-runtimes) for self-hosting setup.