***

title: Stealth Mode
description: Evade bot detection with stealth patches and human-like behavior.
------------------------------------------------------------------------------

Stealth mode makes browser runtimes harder to detect as automated. It patches common detection signals and optionally adds human-like mouse movements, click timing, and scrolling.

## Enabling stealth

### humanize

Enable human-like behavior simulation when launching a runtime:

```ts
const runtime = await workspace.runtimes.browser("main").playwright({
  mode: "ephemeral",
  config: {
    humanize: true,
  },
});
```

When `humanize` is enabled:

* **Mouse movements** follow natural Bezier curves instead of teleporting
* **Random micro-movements** are added between actions
* **Click timing** varies realistically
* **Scrolling** mimics human patterns
* **Typing** has variable keystroke delays

### humanizePersonaId

Each persona ID (0–124) represents a distinct behavioral profile — different movement speeds, curve patterns, and interaction styles:

```ts
const runtime = await workspace.runtimes.browser("main").playwright({
  mode: "ephemeral",
  config: {
    humanize: true,
    humanizePersonaId: 42,
  },
});
```

| Parameter           | Type      | Required | Description                                           |
| ------------------- | --------- | -------- | ----------------------------------------------------- |
| `humanize`          | `boolean` | No       | Enable human-like behavior                            |
| `humanizePersonaId` | `number`  | No       | Persona ID (0–124) for consistent behavioral patterns |

Use a fixed persona ID when you want repeatable behavior across runs. Omit it for random selection.

## What stealth patches

Under the hood, stealth mode patches common automation detection points:

* **WebDriver flags** — Hides `navigator.webdriver` and related properties
* **Browser fingerprint** — Normalizes canvas, WebGL, and audio fingerprints
* **Timing patterns** — Randomizes execution timing to avoid detection
* **Chrome DevTools Protocol** — Masks CDP connection signals

## Combining with other features

Stealth mode works well with other anti-detection features:

```ts
const runtime = await workspace.runtimes.browser("main").playwright({
  mode: "profile",
  profileId: "my-profile",
  config: {
    humanize: true,
    humanizePersonaId: 7,
    solveCaptchas: true,
    proxy: {
      type: "http",
      host: "residential.proxy.com",
      port: 9090,
    },
  },
});
```

This gives you a persistent identity (profile), human-like behavior, automatic captcha solving, and residential proxy — all in one runtime.