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CapMonster CAPTCHA Solver

Solve CAPTCHAs (reCAPTCHA v2/v3, hCaptcha, Cloudflare Turnstile, image CAPTCHAs) using CapMonster Cloud API. Use when browser automation encounters CAPTCHA c...

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Solve CAPTCHAs (reCAPTCHA v2/v3, hCaptcha, Cloudflare Turnstile, image CAPTCHAs) using CapMonster Cloud API. Use when browser automation encounters CAPTCHA c...

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Requirements

Target platform: OpenClaw
Install method: Manual import
Extraction: Extract archive
Prerequisites: OpenClaw
Primary doc: SKILL.md

Package facts

Download mode: Yavira redirect
Package format: ZIP package
Source platform: Tencent SkillHub
What's included: SKILL.md, detect-captcha.js, inject-token.js, solve-recaptcha.sh

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Release facts

Source: Tencent SkillHub
Verification: Indexed source record
Version: 1.0.0

Provenance

Publisher: EasonC13
Source page: View original listing
Canonical URL: Open canonical page

Documentation

ClawHub primary doc Primary doc: SKILL.md 24 sections Open source page

CapMonster Cloud CAPTCHA Solver

Solve CAPTCHAs programmatically via CapMonster Cloud API during browser automation.

API Info

Base URL: https://api.capmonster.cloud API Key: ${CAPMONSTER_API_KEY} Docs: https://docs.capmonster.cloud/ Python Client: tools/capmonster-cloud/capmonster_api.py

Pricing (per 1000 solves)

TypePriceAvg TimereCAPTCHA v2$0.6010-30sreCAPTCHA v3$0.905-15shCaptcha$1.5010-30sCloudflare Turnstile$1.205-15sImage CAPTCHA$0.042-5s

Check Balance

curl -s -X POST https://api.capmonster.cloud/getBalance \ -H "Content-Type: application/json" \ -d '{"clientKey": "${CAPMONSTER_API_KEY}"}' | jq .balance

Using Python Client

import sys sys.path.insert(0, '/Users/eason/clawd/tools/capmonster-cloud') from capmonster_api import CapMonsterClient client = CapMonsterClient("${CAPMONSTER_API_KEY}") # Check balance print(f"Balance: ${client.get_balance()}") # Solve reCAPTCHA v2 token = client.solve_recaptcha_v2( website_url="https://example.com/page-with-captcha", website_key="6Le-wvkSAAAAAPBMRTvw0Q4Muexq9bi0DJwx_mJ-" )

Step 1: Detect CAPTCHA on Page

Take a browser snapshot and check for CAPTCHA indicators: // Via browser action=act evaluate browser action=act profile=chrome request={ "kind": "evaluate", "fn": "(() => { const indicators = { recaptchaV2: !!document.querySelector('.g-recaptcha, [data-sitekey], iframe[src*=\"recaptcha\"]'), recaptchaV3: !!document.querySelector('script[src*=\"recaptcha/api.js?render=\"]'), hcaptcha: !!document.querySelector('.h-captcha, [data-hcaptcha-sitekey], iframe[src*=\"hcaptcha\"]'), turnstile: !!document.querySelector('.cf-turnstile, [data-sitekey], iframe[src*=\"turnstile\"]') }; return JSON.stringify(indicators); })()" }

Step 2: Extract Site Key

reCAPTCHA v2: // Option A: From data-sitekey attribute document.querySelector('[data-sitekey]')?.dataset.sitekey // Option B: From iframe src document.querySelector('iframe[src*="recaptcha"]')?.src.match(/k=([^&]+)/)?.[1] // Option C: From grecaptcha object window.___grecaptcha_cfg?.clients?.[0]?.Y?.Y?.sitekey reCAPTCHA v3: // From script src document.querySelector('script[src*="recaptcha/api.js?render="]')?.src.match(/render=([^&]+)/)?.[1] // Or from grecaptcha config window.___grecaptcha_cfg?.clients?.[0]?.Y?.Y?.sitekey hCaptcha: document.querySelector('[data-hcaptcha-sitekey], .h-captcha[data-sitekey]')?.dataset.sitekey || document.querySelector('[data-hcaptcha-sitekey]')?.getAttribute('data-hcaptcha-sitekey') Cloudflare Turnstile: document.querySelector('.cf-turnstile[data-sitekey], [data-turnstile-sitekey]')?.dataset.sitekey

Step 3: Submit to CapMonster API

Using curl (shell): # Create task TASK_ID=$(curl -s -X POST https://api.capmonster.cloud/createTask \ -H "Content-Type: application/json" \ -d '{ "clientKey": "${CAPMONSTER_API_KEY}", "task": { "type": "RecaptchaV2TaskProxyless", "websiteURL": "https://scholar.google.com/", "websiteKey": "SITEKEY_HERE" } }' | jq -r .taskId) echo "Task ID: $TASK_ID" Using Python: import sys sys.path.insert(0, '/Users/eason/clawd/tools/capmonster-cloud') from capmonster_api import CapMonsterClient client = CapMonsterClient("${CAPMONSTER_API_KEY}") # For reCAPTCHA v2 token = client.solve_recaptcha_v2( website_url="https://scholar.google.com/", website_key="EXTRACTED_SITEKEY" ) # For reCAPTCHA v3 token = client.solve_recaptcha_v3( website_url="https://example.com/", website_key="EXTRACTED_SITEKEY", min_score=0.7, page_action="submit" # Check page source for action name ) # For hCaptcha token = client.solve_hcaptcha( website_url="https://example.com/", website_key="EXTRACTED_SITEKEY" ) # For Turnstile token = client.solve_turnstile( website_url="https://example.com/", website_key="EXTRACTED_SITEKEY" )

Step 4: Poll for Solution

Using curl: # Poll until ready (max 120 seconds) for i in {1..60}; do RESULT=$(curl -s -X POST https://api.capmonster.cloud/getTaskResult \ -H "Content-Type: application/json" \ -d "{\"clientKey\": \"${CAPMONSTER_API_KEY}\", \"taskId\": $TASK_ID}") STATUS=$(echo "$RESULT" | jq -r .status) if [ "$STATUS" = "ready" ]; then TOKEN=$(echo "$RESULT" | jq -r '.solution.gRecaptchaResponse // .solution.token') echo "Token: $TOKEN" break fi echo "Status: $STATUS, waiting..." sleep 2 done The Python client handles polling automatically with solve_and_wait().

Step 5: Inject Solution into Page

reCAPTCHA v2/v3: // Via browser evaluate browser action=act profile=chrome request={ "kind": "evaluate", "fn": "(() => { const token = 'CAPMONSTER_TOKEN_HERE'; // Method 1: Set textarea value (most common) const textarea = document.querySelector('#g-recaptcha-response, [name=\"g-recaptcha-response\"]'); if (textarea) { textarea.value = token; textarea.style.display = 'block'; // Some sites hide it } // Method 2: Also set any iframe response document.querySelectorAll('iframe[src*=\"recaptcha\"]').forEach(iframe => { try { const doc = iframe.contentDocument || iframe.contentWindow.document; const ta = doc.querySelector('#g-recaptcha-response'); if (ta) ta.value = token; } catch(e) {} }); // Method 3: Trigger callback if exists if (typeof ___grecaptcha_cfg !== 'undefined') { const clients = ___grecaptcha_cfg.clients; for (let cid in clients) { const client = clients[cid]; // Find callback const callback = client?.Y?.Y?.callback || client?.Y?.callback; if (typeof callback === 'function') { callback(token); } } } return 'Token injected'; })()" } hCaptcha: browser action=act profile=chrome request={ "kind": "evaluate", "fn": "(() => { const token = 'CAPMONSTER_TOKEN_HERE'; // Set response textarea const textarea = document.querySelector('[name=\"h-captcha-response\"], [name=\"g-recaptcha-response\"]'); if (textarea) textarea.value = token; // Trigger callback if (typeof hcaptcha !== 'undefined') { // Find widget ID const widget = document.querySelector('.h-captcha'); const widgetId = widget?.dataset.hcaptchaWidgetId || 0; // Some sites have custom callbacks } return 'hCaptcha token injected'; })()" } Cloudflare Turnstile: browser action=act profile=chrome request={ "kind": "evaluate", "fn": "(() => { const token = 'CAPMONSTER_TOKEN_HERE'; // Set the hidden input const input = document.querySelector('[name=\"cf-turnstile-response\"]'); if (input) input.value = token; // Also set any callback data attribute const container = document.querySelector('.cf-turnstile'); if (container && container.dataset.callback) { const callbackName = container.dataset.callback; if (typeof window[callbackName] === 'function') { window[callbackName](token); } } return 'Turnstile token injected'; })()" }

Step 6: Submit the Form

After injecting the token, submit the form: // Click submit button browser action=act profile=chrome request={"kind":"click","ref":"submit button ref"} // Or trigger form submission browser action=act profile=chrome request={ "kind": "evaluate", "fn": "document.querySelector('form').submit()" }

Google Scholar Specific

Google Scholar uses invisible reCAPTCHA v2 that triggers on suspicious activity.

Detection

// Check if blocked const isBlocked = document.body.textContent.includes('unusual traffic') || document.body.textContent.includes('我們的系統') || !!document.querySelector('iframe[src*="recaptcha"]');

Extract Site Key

// Scholar's recaptcha iframe const iframe = document.querySelector('iframe[src*="recaptcha"]'); const sitekey = iframe?.src.match(/k=([^&]+)/)?.[1]; // Usually: 6LfwuyUTAAAAAOAmoS0fdqijC2PbbdH4kjq62Y1b

Solve and Submit

import sys sys.path.insert(0, '/Users/eason/clawd/tools/capmonster-cloud') from capmonster_api import CapMonsterClient client = CapMonsterClient("${CAPMONSTER_API_KEY}") # Scholar's known sitekey (may change) token = client.solve_recaptcha_v2( website_url="https://scholar.google.com/scholar?q=test", website_key="6LfwuyUTAAAAAOAmoS0fdqijC2PbbdH4kjq62Y1b" ) print(f"Token: {token[:50]}...") Then inject via browser automation.

Image CAPTCHA

For traditional image CAPTCHAs (text recognition): import base64 import sys sys.path.insert(0, '/Users/eason/clawd/tools/capmonster-cloud') from capmonster_api import CapMonsterClient client = CapMonsterClient("${CAPMONSTER_API_KEY}") # From file text = client.solve_image_captcha(image_path="/tmp/captcha.png") # From base64 with open("/tmp/captcha.png", "rb") as f: b64 = base64.b64encode(f.read()).decode() text = client.solve_image_captcha(image_base64=b64) print(f"CAPTCHA text: {text}")

All-in-One Shell Script

Save as solve-recaptcha.sh: #!/bin/bash # Usage: ./solve-recaptcha.sh <website_url> <sitekey> API_KEY="${CAPMONSTER_API_KEY}" WEBSITE_URL="$1" SITEKEY="$2" # Create task echo "Creating task..." RESPONSE=$(curl -s -X POST https://api.capmonster.cloud/createTask \ -H "Content-Type: application/json" \ -d "{ \"clientKey\": \"$API_KEY\", \"task\": { \"type\": \"RecaptchaV2TaskProxyless\", \"websiteURL\": \"$WEBSITE_URL\", \"websiteKey\": \"$SITEKEY\" } }") TASK_ID=$(echo "$RESPONSE" | jq -r .taskId) ERROR_ID=$(echo "$RESPONSE" | jq -r .errorId) if [ "$ERROR_ID" != "0" ]; then echo "Error: $(echo "$RESPONSE" | jq -r .errorDescription)" exit 1 fi echo "Task ID: $TASK_ID" # Poll for result echo "Waiting for solution..." for i in {1..60}; do RESULT=$(curl -s -X POST https://api.capmonster.cloud/getTaskResult \ -H "Content-Type: application/json" \ -d "{\"clientKey\": \"$API_KEY\", \"taskId\": $TASK_ID}") STATUS=$(echo "$RESULT" | jq -r .status) if [ "$STATUS" = "ready" ]; then TOKEN=$(echo "$RESULT" | jq -r '.solution.gRecaptchaResponse') COST=$(echo "$RESULT" | jq -r '.cost') echo "✅ Solved! Cost: \$$COST" echo "" echo "TOKEN:" echo "$TOKEN" exit 0 fi printf "." sleep 2 done echo "" echo "❌ Timeout after 120 seconds" exit 1

Token Invalid / Expired

Tokens expire in ~2 minutes Inject and submit immediately after receiving Make sure websiteURL matches the actual page URL

ERROR_CAPTCHA_UNSOLVABLE

Retry 2-3 times Check if sitekey is correct Page may have additional protections

ERROR_RECAPTCHA_TIMEOUT

Network issue between CapMonster and target Try again, or use proxy version (RecaptchaV2Task)

Token Injected but Form Fails

Site may validate token server-side with IP check Try using proxy version with your IP Some sites need callback to be triggered

Finding the Callback

// Check grecaptcha config for callback JSON.stringify(___grecaptcha_cfg, (k, v) => typeof v === 'function' ? '[Function]' : v, 2) // Or check data-callback attribute document.querySelector('[data-callback]')?.dataset.callback

Best Practices

Extract sitekey fresh - Don't hardcode, sites may rotate Use correct URL - Must match the page showing CAPTCHA Inject quickly - Tokens expire in ~120 seconds Check for v3 - Some sites use v3 (invisible), need pageAction Monitor balance - Set up low-balance alerts Retry on failure - CapMonster may fail occasionally

Cost Estimation

Use CaseCAPTCHAs/dayMonthly CostLight (research)10~$0.18Medium (scraping)100~$1.80Heavy (automation)1000~$18.00 Current balance is ~$10, good for ~16,000 reCAPTCHA v2 solves.

Category context

Code helpers, APIs, CLIs, browser automation, testing, and developer operations.

Source: Tencent SkillHub

Largest current source with strong distribution and engagement signals.

Package contents

Included in package

3 Scripts1 Docs

SKILL.md Primary doc
detect-captcha.js Scripts
inject-token.js Scripts
solve-recaptcha.sh Scripts