> ## Documentation Index
> Fetch the complete documentation index at: https://upstash.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Ephemeral Box

`EphemeralBox` is a lightweight, short-lived sandbox that provides only **exec** and **file** operations. It's designed for quick, disposable compute tasks where a full Box (with agent, git, snapshots, etc.) is unnecessary.

***

## Creation

```typescript theme={"system"}
import { EphemeralBox } from "@upstash/box"

const box = await EphemeralBox.create({
  runtime: "node",  // "node" | "python" | "golang" | "ruby" | "rust"
  ttl: 3600,        // seconds, max 259200 (3 days), default 259200
  name: "my-ephemeral-worker",          // optional
  networkPolicy: { mode: "allow-all" }, // optional
})
```

**Key difference from `Box.create()`:** Ephemeral boxes are ready immediately — no polling. The API returns with `status: "idle"` and the box is usable right away.

The request sends `{ ephemeral: true, ttl?, runtime? }` to `POST /v2/box`.

***

## Available API

| Feature                                                     | Box | EphemeralBox |
| ----------------------------------------------------------- | --- | ------------ |
| `exec.command()`                                            | Yes | Yes          |
| `exec.code()`                                               | Yes | Yes          |
| `exec.stream()`                                             | Yes | Yes          |
| `exec.streamCode()`                                         | Yes | Yes          |
| `files.read/write/list/upload/download`                     | Yes | Yes          |
| `schedule.exec/prompt/list/get/pause/resume/delete`         | Yes | Yes          |
| `cd()` / `cwd`                                              | Yes | Yes          |
| `getStatus()`                                               | Yes | Yes          |
| `delete()`                                                  | Yes | Yes          |
| `networkPolicy` / `updateNetworkPolicy()`                   | Yes | Yes          |
| `expiresAt`                                                 | No  | Yes          |
| `agent.run()` / `agent.stream()`                            | Yes | **No**       |
| `git.*`                                                     | Yes | **No**       |
| `getPublicUrl()` / `listPublicUrls()` / `deletePublicUrl()` | Yes | **No**       |
| `snapshot()` / `fromSnapshot()`                             | Yes | Yes          |
| `pause()` / `resume()`                                      | Yes | **No**       |
| `configureModel()`                                          | Yes | **No**       |
| `logs()` / `listRuns()`                                     | Yes | **No**       |

***

## Properties

* **`id`** — box identifier (e.g. `"sweet-shark-26021"`)
* **`expiresAt`** — Unix timestamp (seconds) when the box auto-deletes

***

## How it differs from Box

1. **Instant creation** — no polling loop; the response is the ready box
2. **Auto-expiry** — boxes are automatically deleted after TTL; `expiresAt` tracks this
3. **Reduced surface** — only exec + files; no agent, git, public URLs, snapshots, pause/resume
4. **Simpler config** — `EphemeralBoxConfig` has only `apiKey`, `runtime`, `ttl`, `name`, `networkPolicy`, `baseUrl`, `timeout`, `debug` (no agent, git, env, skills, mcpServers)
5. **Composition over inheritance** — `EphemeralBox` wraps an internal `Box` and exposes only the relevant subset, so agent/git/etc. are not accessible even at runtime

***

## Examples

### Run a shell command

```typescript theme={"system"}
const run = await box.exec.command("echo hello")
console.log(run.result) // "hello"
```

### Execute inline code

```typescript theme={"system"}
const result = await box.exec.code({
  code: 'console.log(JSON.stringify({ sum: 1 + 2 }))',
  lang: "js",
})
```

### File operations

```typescript theme={"system"}
await box.files.write({ path: "data.json", content: '{"key":"value"}' })
const content = await box.files.read("data.json")
```

### Clean up early

Otherwise the box auto-deletes at `expiresAt`.

```typescript theme={"system"}
await box.delete()
```

***

## Exported types

* `EphemeralBox` — the class
* `EphemeralBoxConfig` — config for `EphemeralBox.create()`
* `EphemeralBoxData` — extends `BoxData` with `ephemeral: boolean` and `expires_at: number`