2Captcha CLI

2Captcha Skill

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

Installation

One-line install
curl -fsSL https://raw.githubusercontent.com/adinvadim/2captcha-cli/main/solve-captcha \
  -o /usr/local/bin/solve-captcha && chmod +x /usr/local/bin/solve-captcha

Verify
solve-captcha --version

Configuration

Save your 2Captcha API key
mkdir -p ~/.config/2captcha
echo "YOUR_API_KEY" > ~/.config/2captcha/api-key

Or use environment variable
export TWOCAPTCHA_API_KEY="your-key"

Get your API key at https://2captcha.com/enterpage

Quick Reference

Check Balance First

./solve-captcha balance

Image CAPTCHA

From file
./solve-captcha image /path/to/captcha.png

From URL  
./solve-captcha image "https://site.com/captcha.jpg"

With options
./solve-captcha image captcha.png --numeric 1 --math
./solve-captcha image captcha.png --comment "Enter red letters only"

reCAPTCHA v2

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

reCAPTCHA v3

./solve-captcha recaptcha3 --sitekey "KEY" --url "URL" --action "submit" --min-score 0.7

hCaptcha

./solve-captcha hcaptcha --sitekey "KEY" --url "URL"

Cloudflare Turnstile

./solve-captcha turnstile --sitekey "0x4AAA..." --url "URL"

FunCaptcha (Arkose)

./solve-captcha funcaptcha --public-key "KEY" --url "URL"

GeeTest

v3
./solve-captcha geetest --gt "GT" --challenge "CHALLENGE" --url "URL"

v4
./solve-captcha geetest4 --captcha-id "ID" --url "URL"

Text Question

./solve-captcha 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 solve-captcha with params

4. Inject token - Set g-recaptcha-response or callback

Example: Inject reCAPTCHA Token

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