g0i.ai Cloudflare Blocking Analysis — 30.06.2026

Summary

g0i.ai uses Cloudflare Turnstile which checks browser fingerprint, not just IP. API-only registration is impossible regardless of captcha quality or proxy freshness.

Tested Methods (all failed)

1. API direct (no proxy)

requests.post() to /api/auth/register with Turnstile token from 2captcha
Result: rate-limited by website owner (Cloudflare IP block)
100% failure rate

2. API + SOCKS5 proxy

49 fresh proxies from proxifly (verified Jun 30, 49/100 alive)
requests.post() through SOCKS5 proxy with Turnstile token
Result: Bot verification failed. Please complete the challenge and try again.
100% failure rate across 12+ proxies

3. API + 2captcha through same proxy

2captcha passed proxy parameter to solve Turnstile through same IP
API call through same proxy with token
Result: Bot verification failed — same error
The issue is NOT IP-binding — 2captcha solved through correct proxy

4. Playwright fresh profile

launch_persistent_context with new Chrome profile
Turnstile auto-solved (button enabled)
Form filled, "Create account" clicked
Result: Target page, context or browser has been closed — silent Cloudflare block
Button clicks, no navigation happens

5. Playwright via CDP to existing Chrome

connect_over_cdp("http://localhost:9222") to Chrome with mcp-chrome profile
Turnstile auto-solved
Form filled, clicked
Result: Cloudflare silently blocks — form button works but page stays on register

Root Cause

Cloudflare binds Turnstile token to a browser fingerprint hash (JA3, JS execution, TLS fingerprint, canvas fingerprint). The API endpoint verifies this hash server-side. A requests.post() call has no browser fingerprint, so the token is always rejected.

What MIGHT work

nodriver (undetected-chromedriver successor) — true browser fingerprint spoofing
camoufox — Firefox-based anti-detect with full fingerprint spoofing
Manual registration through a real browser, then extract API key

Wasted Resources

~15 2captcha solves at $0.002 each = $0.03 total
Does NOT include the 300+ attempts from the v2 script bug (ERROR_SITEKEY loop)

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