Solving Captchas in Browser Automation Studio

Sooner or later a target site puts a captcha in front of the action you’re automating. BAS doesn’t break captchas on its own — instead it connects to a solving service that returns the answer, which your bot then submits. Understanding that division of labor is the whole game.

How captcha solving works in BAS

The flow is always the same three steps:

1. Detect the captcha on the page.
2. Send it to a solving service via your API key.
3. Inject the returned answer and continue.

The service does the actual solving — either with human workers or AI models. Your bot’s job is to recognise the captcha, pass the right data, and apply the result correctly.

Connecting a solving service

Sign up with a service like 2Captcha/ruCaptcha, Anti-Captcha or CapMonster, top up a small balance, and copy your API key. In BAS you set this key once, then the captcha-solving action uses it for every request. Keep an eye on the balance — an empty account silently turns every solve into a failure.

Image captchas

The simplest case. Capture the captcha image (a screenshot of the element or its source), send it to the service, and type the returned text into the answer field. Most of the reliability work here is just getting a clean image of the right element.

reCAPTCHA and hCaptcha

These are token-based, not text-based. You don’t type an answer — the service returns a token that you place into the page’s hidden response field (for reCAPTCHA, the g-recaptcha-response), then submit. BAS’s solving action handles the round-trip; your part is supplying the site key and the page URL the service needs.

Build a solve-verify-retry loop

Solving services aren’t 100% reliable, so never assume the first answer worked:

• Verify after submitting — did the page advance, or did the captcha reappear?
• Retry on failure, requesting a fresh solve rather than reusing the bad one.
• Cap retries (e.g. three attempts) so a hard-blocked page doesn’t loop forever and drain your balance.

Keep cost and speed in mind

Each solve costs money and adds several seconds. Across thousands of runs that adds up, so only invoke solving when a captcha is actually present — detect first, solve second. A well-warmed account with a clean fingerprint and good proxies often sees fewer captchas in the first place, which ties directly into the fingerprint article in this guide.