Stealth Mode

1. Default proxy — traffic routes through an ISP proxy from a shared Kernel pool, providing a stable exit IP for the session.
2. Automatic CAPTCHA solver — solves reCAPTCHAs, Cloudflare challenges, and similar tests automatically.

​

IP Rotation Behavior

import Kernel from '@onkernel/sdk';

const kernel = new Kernel();

const kernelBrowser = await kernel.browsers.create({
  stealth: true,
});

from kernel import Kernel

kernel = Kernel()

kernel_browser = kernel.browsers.create(
    stealth=True,
)

package main

import (
	"context"

	"github.com/kernel/kernel-go-sdk"
)

func main() {
	ctx := context.Background()
	client := kernel.NewClient()

	kernelBrowser, err := client.Browsers.New(ctx, kernel.BrowserNewParams{
		Stealth: kernel.Bool(true),
	})
	if err != nil {
		panic(err)
	}
	_ = kernelBrowser
}

​

Bring your own proxy or CAPTCHA solver

• BYO proxy, keep CAPTCHA solver — launch a stealth browser with your own proxy via proxy_id. Replaces the ISP default; CAPTCHA solver stays loaded.
• BYO proxy, no CAPTCHA solver — launch a non-stealth browser with your own proxy_id. Full anti-detection config, no managed proxy or CAPTCHA extension.
• Managed proxy, no CAPTCHA solver — launch a non-stealth browser with a defined managed proxy via proxy_id. Full anti-detection config with a Kernel managed proxy and no CAPTCHA extension enabled.
• Disable the default proxy at runtime — on a running stealth browser, set disable_default_proxy to route directly while keeping the CAPTCHA solver.

​

Stealth with your own proxy

const kernelBrowser = await kernel.browsers.create({
  stealth: true,
  proxy_id: myProxy.id,
});

kernel_browser = kernel.browsers.create(
    stealth=True,
    proxy_id=my_proxy.id,
)

kernelBrowser, err := client.Browsers.New(ctx, kernel.BrowserNewParams{
	Stealth: kernel.Bool(true),
	ProxyID: kernel.String(myProxy.ID),
})
if err != nil {
	panic(err)
}
_ = kernelBrowser

​

CAPTCHA handling behavior

​

Anthropic computer use

​

Cloudflare challenge

​

hCaptcha (beta)