Capium Browser

Capium is a hardened, always-latest stealth browser you drive with the Playwright API you already know. Its fingerprint surfaces are rewritten in the browser's own source, so one license key gives you a coherent device that runs locally on Linux, Windows and macOS.

Why Capium

Rewritten at the source. User-Agent, UA-CH, WebGL, canvas, audio, screen, hardware, fonts, voices and WebRTC are changed inside Chromium, not shimmed in JavaScript a detector can catch re-defining.
Coherent per seed. A single seed derives a whole consistent device, and the same seed reproduces it every time.
The API you know. Driven by stock Playwright. No patched driver, no new mental model.
Always the latest binary. One key, forever current. You get the newest hardened build the moment it ships.

A first taste

Install the toolkit, drop in your license key, and drive the page:

first_run.py

from capium import launch_context

# The license comes from CAPIUM_LICENSE_KEY or ~/.capium/license
# (or pass license_key="..."). The stealth binary auto-downloads on
# first launch. launch_context returns (browser, context, page).
browser, ctx, page = launch_context(
    seed=200123,            # a coherent, repeatable device
    headless=False,         # headed is recommended
    humanize=True,          # human-like mouse / typing / scroll
    url="https://fingerprint.com/demo/",
)
print(page.title())
browser.close()

Where to next

Quickstart — from install to a live session in a few minutes.
Seeds & personas — how one seed becomes a whole device.
What Capium patches — every surface it rewrites.
Parameters & flags — the full reference.

Billing, licensing and support live on capzy.ai. Create a free account there to get your license key. The free tier runs a real stealth session, no card required.

Quickstart