FunCaptcha (Arkose) solver for Selenium Python

Runnable example

from captchasonic import CaptchaSonic
from selenium import webdriver

driver = webdriver.Chrome()
driver.get('https://target.example.com/login')

sonic = CaptchaSonic('YOUR_API_KEY')
result = sonic.solve(
    type='FunCaptchaTaskProxyless',
    website_url=driver.current_url,
    website_public_key='XXX-XXX-XXX',
    funcaptcha_api_js_subdomain='client-api.arkoselabs.com',
    data='{"blob":"..."}',
)

driver.execute_script(
    'document.querySelector("[name=fc-token]").value = arguments[0];',
    result.token,
)
driver.find_element('css selector', 'form button[type=submit]').click()

Replace YOUR_API_KEY with a real key from your dashboard. The token is good for one form submission.

FAQ

What is the Arkose data blob?

High-friction Arkose deployments emit an encrypted "data" parameter the captcha widget sends along with the token. Pass that string to Sonic so the returned token is bound to the same session context the page expects.

Does FunCaptcha solving need a real browser?

No. Sonic solves Arkose puzzles server-side — Selenium is only present in your stack because the rest of your flow uses it. The captcha hop itself never touches your browser.

How fast are 3D match-the-shape puzzles?

They're the slowest Arkose variant — typically 12–25 seconds. Rotation and image-pick puzzles average 10–18 seconds.

Other FunCaptcha (Arkose) stacks

• reCAPTCHA v2 · Selenium · PythonStep-by-step guide: solve Google reCAPTCHA v2 in a Selenium Python automation. Returns a valid gRecaptchaResponse token in under 3 seconds.
• hCaptcha · Selenium · PythonBypass hCaptcha from a Selenium Python script. Drop the Sonic token into the form's hidden field; no clicking the widget.