# Run an agent

Start a computer, hand it to an agent and watch the session.

<video src="/docs/media/run-an-agent.webm" title="An agent running on an Elios computer" autoPlay loop muted playsInline controls />

:::steps
### Prepare

State what the reader needs before starting.

### Build

```ts
// The complete, runnable code for this guide goes here.
```

### Check the result

Show what success looks like, in the dashboard or in the output.

![The new computer in the dashboard, running the agent](/docs/media/run-an-agent-result.png)
:::

## Troubleshooting

| Symptom            | Fix                                              |
| ------------------ | ------------------------------------------------ |
| `401 Unauthorized` | Check that `ELIOS_API_KEY` is set in this shell. |