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

# Stealth mode

> Reach protected sources without managing browsers, proxies, or evasion.

Many sources sit behind antibot defenses that block ordinary automation. Stealth mode is how Deck evades those defenses.

Sources are always evolving their antibot defenses, so it's possible to see inconsistent behavior on the same source. Detection can be unpredictable, sources can add new defenses, and challenges may be randomized. For this reason, it's important to handle the `blocked` error gracefully.

Stealth mode comes in two tiers. Basic stealth mode is on by default for every plan. Advanced stealth mode, with stronger configurations for the most heavily protected sources, is available on Enterprise plans.

## Identifying blocked tasks

When a source blocks a task because of bot defenses, Deck returns a `blocked` error on the task:

```json theme={null}
{
  "errors": [
    {
      "type": "task",
      "code": "blocked",
      "message": "Blocked by antibot."
    }
  ]
}
```

If you see this error on an account that already has Advanced stealth mode active, file a support ticket at [help@deck.co](mailto:help@deck.co). The team can investigate the specific source and push updates to your account. If you need Advanced stealth mode on your account, [schedule a demo](https://deck.co/contact).

## Basic stealth mode

Basic stealth mode runs every session with a configuration tuned to clear common bot defenses. Deck profiles each source, picks the right approach, and updates it as the source changes.

It includes:

* **Site-aware automation.** Configurations tuned per source and re-evaluated as sites change.
* **Human-like interaction.** Sessions interact with sites the way a real user would.
* **Interaction challenges.** Captchas and other interactive verifications are detected and solved automatically. For challenges that require the end user, like a one-time code, use [interactions](/guides/interactions) to forward the prompt.

## Advanced stealth mode

<Note>
  Available on Enterprise plans.
</Note>

Advanced stealth mode includes everything in Basic, plus stronger configurations for the most heavily protected sources:

* **Authentic browser profiles.** Stronger browser profiles reserved for the hardest sites.
* **Adaptive intensity.** Stealth behavior tuned per site for the right balance of speed and evasion.
* **Wider network egress.** Premium network paths chosen automatically per site.
* **Continuous adaptation.** Stealth strategies that learn from each source and reshape themselves as defenses change.