CAPTCHA challenges appear on 40-60% of sites during bulk submission campaigns. Without automatic solving, each challenge requires manual intervention — pausing the campaign, solving manually, resuming. 2Captcha integration eliminates this friction entirely.
How 2Captcha Works
2Captcha operates a network of human solvers who complete CAPTCHA challenges for a fee. The workflow:
1. Your extension detects a CAPTCHA on the page
2. It sends the CAPTCHA parameters to the 2Captcha API
3. A human solver completes the challenge (10-60 seconds)
4. The solution token is returned to your extension
5. The token is injected into the page and the form proceeds
The entire process happens without any user action.
Supported CAPTCHA Types
- **reCAPTCHA v2** (checkbox): sends site key + page URL, receives g-recaptcha-response token
- **reCAPTCHA v3** (invisible scoring): sends site key + action, receives token
- **hCaptcha**: sends site key, receives h-captcha-response token
- **Cloudflare Turnstile**: sends site key, receives cf-turnstile-response token
These four types cover 95%+ of CAPTCHAs encountered in directory submission campaigns.
Setup
1. Register at 2captcha.com
2. Purchase credits ($3 minimum, covers ~1,000 solves)
3. Copy your API key
4. Paste in Fillnex Settings → 2Captcha
5. Enable automatic solving
Cost Analysis
Average campaign with 200 sites, 50% CAPTCHA rate: 100 solves × $0.003 = $0.30. The time saved from not manually solving 100 CAPTCHAs: 30-50 minutes. ROI: effectively infinite.
For full campaign context, see our form automation technical guide.