2Captcha Skill ({{os}})

Solve CAPTCHAs programmatically using the 2Captcha human-powered service.

Installation

npm install -g 2captcha-cli

# Verify
2captcha-cli --version

Configuration

Option 1: Environment variable (Recommended)

Set your API key as an environment variable. Get your key at https://2captcha.com/enterpage

Unix/Mac:

export TWOCAPTCHA_API_KEY=your-key
# To persist, add the above line to ~/.bashrc or ~/.zshrc

Windows:

# Session only
$env:TWOCAPTCHA_API_KEY = "your-key"

# Persistent
setx TWOCAPTCHA_API_KEY your-key

Option 2: Save API key to file

Unix/Mac:

mkdir -p ~/.2captcha
echo "YOUR_API_KEY" > ~/.2captcha/api-key

Windows:

New-Item -ItemType Directory -Path "$env:APPDATA\2captcha" -Force
"YOUR_API_KEY" | Out-File -FilePath "$env:APPDATA\2captcha\api-key" -Encoding UTF8

Quick Reference

Check Balance First

2captcha-cli balance

Image CAPTCHA

# From file
2captcha-cli image /path/to/captcha.png

# From URL
2captcha-cli image "https://site.com/captcha.jpg"

# With options
2captcha-cli image captcha.png --numeric 1 --math
2captcha-cli image captcha.png --comment "Enter red letters only"

reCAPTCHA v2

2captcha-cli recaptcha2 --sitekey "6Le-wvk..." --url "https://example.com"

reCAPTCHA v3

2captcha-cli recaptcha3 --sitekey "KEY" --url "URL" --action "submit" --min-score 0.7

hCaptcha

2captcha-cli hcaptcha --sitekey "KEY" --url "URL"

Cloudflare Turnstile

2captcha-cli turnstile --sitekey "0x4AAA..." --url "URL"

FunCaptcha (Arkose)

2captcha-cli funcaptcha --public-key "KEY" --url "URL"

GeeTest

# v3
2captcha-cli geetest --gt "GT" --challenge "CHALLENGE" --url "URL"

# v4
2captcha-cli geetest4 --captcha-id "ID" --url "URL"

Text Question

2captcha-cli text "What color is the sky?" --lang en

Finding CAPTCHA Parameters

reCAPTCHA sitekey

Look for:

• data-sitekey attribute in HTML
• k= parameter in reCAPTCHA iframe URL
• Network request to google.com/recaptcha/api2/anchor

hCaptcha sitekey

Look for:

• data-sitekey in hCaptcha div
• Network requests to hcaptcha.com

Turnstile sitekey

Look for:

• data-sitekey in Turnstile widget
• cf-turnstile class elements

Workflow for Browser Automation

1. Detect CAPTCHA - Check if page has captcha element
2. Extract params - Get sitekey/challenge from page source
3. Solve via CLI - Call 2captcha-cli with params
4. Inject token - Set g-recaptcha-response or callback

Example: Inject reCAPTCHA Token

// After getting token from 2captcha-cli
document.getElementById('g-recaptcha-response').value = token;
// Or call callback if defined
___grecaptcha_cfg.clients[0].callback(token);

Example: Automation Script

Unix/Mac:

export TWOCAPTCHA_API_KEY="YOUR_API_KEY"
token=$(2captcha-cli recaptcha2 --sitekey "6Le-wvk..." --url "https://example.com")
echo "Token: $token"

Windows:

$env:TWOCAPTCHA_API_KEY = "YOUR_API_KEY"
$token = 2captcha-cli recaptcha2 --sitekey "6Le-wvk..." --url "https://example.com"
Write-Host "Token: $token"

Cost Awareness

• Check balance before heavy automation
• Image: ~$0.001 per solve
• reCAPTCHA/hCaptcha/Turnstile: ~$0.003 per solve

Error Handling

Common errors:

• ERROR_ZERO_BALANCE - Top up account
• ERROR_NO_SLOT_AVAILABLE - Retry in few seconds
• ERROR_CAPTCHA_UNSOLVABLE - Bad image or impossible captcha
• ERROR_WRONG_CAPTCHA_ID - Invalid task ID

Notes

• Solving takes 10-60 seconds depending on type
• reCAPTCHA v3 may need multiple attempts for high scores
• Some sites detect automation — use carefully
• Tokens expire — use within 2-5 minutes