Automated Login CAPTCHA Handling with CaptchaAI

Login pages are the most common place to encounter CAPTCHAs. Whether it's reCAPTCHA v2, v3, Turnstile, or an image CAPTCHA, CaptchaAI solves the challenge while your automation handles form filling and submission.

Common Login CAPTCHA Types

Method 1: HTTP Requests (No Browser)

For login forms that accept standard POST requests:

import requests
import time

API_KEY = "YOUR_API_KEY"

def solve_recaptcha(site_key, page_url):
    resp = requests.get("https://ocr.captchaai.com/in.php", params={
        "key": API_KEY, "method": "userrecaptcha",
        "googlekey": site_key, "pageurl": page_url
    })
    task_id = resp.text.split("|")[1]
    for _ in range(60):
        time.sleep(5)
        result = requests.get("https://ocr.captchaai.com/res.php", params={
            "key": API_KEY, "action": "get", "id": task_id
        })
        if result.text == "CAPCHA_NOT_READY": continue
        if result.text.startswith("OK|"): return result.text.split("|")[1]
        raise Exception(result.text)
    raise TimeoutError()

# Login flow
session = requests.Session()
login_url = "https://example.com/login"

# Load login page to get cookies and site key
page = session.get(login_url)
# Extract site_key from the page HTML...
site_key = "6Le-wvkS..."

# Solve CAPTCHA
token = solve_recaptcha(site_key, login_url)

# Submit login form
resp = session.post(login_url, data={
    "username": "user@example.com",
    "password": "your_password",
    "g-recaptcha-response": token
})

if resp.url != login_url:
    print("Login successful!")
    # session now has auth cookies for subsequent requests

Method 2: Selenium (Python)

For login pages that require JavaScript execution:

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
import requests
import time

API_KEY = "YOUR_API_KEY"

options = webdriver.ChromeOptions()
options.add_argument("--disable-blink-features=AutomationControlled")
driver = webdriver.Chrome(options=options)

# Navigate to login page
driver.get("https://example.com/login")
wait = WebDriverWait(driver, 10)

# Fill in credentials
username_field = wait.until(EC.presence_of_element_located((By.NAME, "username")))
username_field.send_keys("user@example.com")
driver.find_element(By.NAME, "password").send_keys("your_password")

# Extract site key and solve
recaptcha = driver.find_element(By.CLASS_NAME, "g-recaptcha")
site_key = recaptcha.get_attribute("data-sitekey")

token = solve_recaptcha(site_key, driver.current_url)

# Inject token
driver.execute_script(
    f"document.getElementById('g-recaptcha-response').innerHTML = '{token}';"
)

# Submit
driver.find_element(By.CSS_SELECTOR, 'button[type="submit"]').click()
wait.until(EC.url_changes(driver.current_url))
print(f"Logged in! Now at: {driver.current_url}")

Method 3: Puppeteer (Node.js)

const puppeteer = require("puppeteer");
const axios = require("axios");

const API_KEY = "YOUR_API_KEY";

async function solveRecaptcha(siteKey, pageUrl) {
  const submit = await axios.get("https://ocr.captchaai.com/in.php", {
    params: {
      key: API_KEY,
      method: "userrecaptcha",
      googlekey: siteKey,
      pageurl: pageUrl,
    },
  });
  const taskId = submit.data.split("|")[1];

  while (true) {
    await new Promise((r) => setTimeout(r, 5000));
    const result = await axios.get("https://ocr.captchaai.com/res.php", {
      params: { key: API_KEY, action: "get", id: taskId },
    });
    if (result.data === "CAPCHA_NOT_READY") continue;
    if (result.data.startsWith("OK|")) return result.data.split("|")[1];
    throw new Error(result.data);
  }
}

(async () => {
  const browser = await puppeteer.launch({ headless: "new" });
  const page = await browser.newPage();
  await page.goto("https://example.com/login");

  // Fill credentials
  await page.type("#username", "user@example.com");
  await page.type("#password", "your_password");

  // Get site key and solve
  const siteKey = await page.$eval(".g-recaptcha", (el) =>
    el.getAttribute("data-sitekey")
  );
  const token = await solveRecaptcha(siteKey, page.url());

  // Inject and submit
  await page.evaluate(
    (t) => (document.getElementById("g-recaptcha-response").innerHTML = t),
    token
  );
  await page.click('button[type="submit"]');
  await page.waitForNavigation();

  console.log("Logged in:", page.url());
  await browser.close();
})();

Handling Multi-Factor + CAPTCHA

Some sites combine CAPTCHAs with multi-factor authentication:

# Step 1: Solve CAPTCHA and submit login
token = solve_recaptcha(site_key, login_url)
resp = session.post(login_url, data={
    "username": "user@example.com",
    "password": "your_password",
    "g-recaptcha-response": token
})

# Step 2: Handle MFA page (if redirected)
if "verify" in resp.url or "mfa" in resp.url:
    # Your MFA code logic here
    mfa_code = get_mfa_code()
    resp = session.post(resp.url, data={"code": mfa_code})

# Step 3: Verify logged in
assert "dashboard" in resp.url

Troubleshooting

FAQ

Can I automate logins to any website?

CaptchaAI handles the CAPTCHA component. Your automation needs to handle the login form itself (filling fields, submitting, managing cookies). The legality depends on your authorization to access the account.

Do I need a browser for login automation?

Not always. Many login pages accept standard HTTP POST requests. Use a browser only when the login requires JavaScript execution or complex interactions.

How do I handle session maintenance after login?

Use requests.Session() in Python or maintain cookies in your browser instance. The session cookies from login are needed for all subsequent authenticated requests.

Related Guides

• Selenium CAPTCHA Handling with Python
• Puppeteer CAPTCHA Solving with Node.js
• Playwright CAPTCHA Handling