caniscrape 1.0.2

Analyze website anti-bot protections before you scrape

caniscrape 🔍

Know before you scrape. Analyze any website's anti-bot protections in seconds.

Stop wasting hours building scrapers only to discover the site has Cloudflare + JavaScript rendering + CAPTCHA + rate limiting. caniscrape does reconnaissance upfront so you know exactly what you're dealing with before writing a single line of code.

🎯 What It Does

caniscrape analyzes a URL and tells you:

• What protections are active (WAF, CAPTCHA, rate limits, TLS fingerprinting, honeypots, bot detection services)
• Difficulty score (0-10 scale: Easy → Very Hard)
• Specific recommendations on what tools/proxies you'll need
• Estimated complexity so you can decide: build it yourself or use a service
• Historical changes track how protections evolve over time (NEW in v1.0.0)
• Advanced fingerprinting detection (v0.3.0)
• Browser integrity analysis (v0.3.0)
• CAPTCHA solving capability (v0.2.0)
• Proxy rotation support (v0.2.0)

🚀 Quick Start

Installation

pip install caniscrape

Required dependencies:

# Install wafw00f (WAF detection)
pipx install wafw00f

# Install Playwright browsers (for JS detection)
playwright install chromium

Basic Usage

# Analyze a website
caniscrape scan https://example.com

Cloud Integration (NEW in v1.0.0)

# One-time setup: link to cloud for scan history
caniscrape init

# Now all scans automatically sync to cloud
caniscrape scan https://example.com

# View scan history at https://caniscrape.org/projects

Example Output

🆕 What's New in v1.0.0

Cloud Integration ☁️

• Persistent scan history: Track how site protections change over time
• Automatic sync: Enable auto-upload to push every scan to the cloud
• Smart diffing: Automatically detect when protections change
• Offline support: Scans cache locally when offline, push them later

Privacy-First Telemetry 📊

• Usage telemetry: Anonymous CLI usage stats (opt-in)
• Public scan database: Contribute to a searchable database of site protections (opt-in)
• Full control: Easy opt-out and GDPR data deletion

Scan Comparison 🔄

• Automatically compares new scans against previous ones
• Highlights difficulty score changes, new/removed protections
• Shows exactly what changed and when

Previous updates:

• v0.3.0: Advanced fingerprinting detection and browser integrity analysis
• v0.2.0: Proxy rotation and CAPTCHA solving capabilities
• v0.1.0: Initial release with core detection features

🔬 What It Analyzes

1. WAF Detection

Identifies Web Application Firewalls (Cloudflare, Akamai, Imperva, DataDome, PerimeterX, etc.)

2. Rate Limiting

• Tests with burst and sustained traffic patterns
• Detects HTTP 429s, timeouts, throttling, soft bans
• Determines blocking threshold (requests/min)

3. JavaScript Rendering

• Compares content with/without JS execution
• Detects SPAs (React, Vue, Angular)
• Calculates percentage of content missing without JS

4. CAPTCHA Detection & Solving

• Scans for reCAPTCHA, hCaptcha, Cloudflare Turnstile
• Tests if CAPTCHA appears on load or after rate limiting
• Monitors network traffic for challenge endpoints
• Attempts to solve detected CAPTCHAs using Capsolver or 2Captcha

5. TLS Fingerprinting

• Compares standard Python clients vs browser-like clients
• Detects if site blocks based on TLS handshake signatures

6. Behavioral Analysis

• Scans for invisible "honeypot" links (bot traps)
• Detects if site is monitoring mouse/scroll behavior

7. Advanced Fingerprinting Detection

• Identifies enterprise bot detection services (PerimeterX, DataDome, Akamai Bot Manager, etc.)
• Detects canvas fingerprinting attempts
• Monitors which user events are being tracked (mouse, keyboard, scroll)
• Catches client-side bot detection that traditional tools miss

8. Browser Integrity Analysis

• Forensic-level check of browser function modifications
• Detects tampering with canvas APIs, timing functions
• Identifies anti-debugging techniques
• Explains what each modification indicates (fingerprinting, evasion detection, etc.)

9. robots.txt

• Checks scraping permissions
• Extracts recommended crawl-delay

10. Change Detection ✨ v1.0.0

• Compares scans against previous results
• Highlights new/removed protections
• Tracks difficulty score changes over time

🛠️ Advanced Usage

Cloud Commands (NEW in v1.0.0)

# Link this directory to a cloud project
caniscrape init

# Connect to an existing project
caniscrape link

# Push cached scans to cloud
caniscrape push

# Configure auto-upload
caniscrape config set auto-upload on
caniscrape config set auto-upload off

# View current configuration
caniscrape config show

Telemetry Management (NEW in v1.0.0)

# Manage usage telemetry
caniscrape telemetry usage on
caniscrape telemetry usage off

# Manage public scan contributions
caniscrape telemetry scans on
caniscrape telemetry scans off

# Delete all telemetry data (GDPR)
caniscrape telemetry delete

# View telemetry status
caniscrape telemetry status

Aggressive WAF Detection

# Find ALL WAFs (slower, may trigger rate limits)
caniscrape scan https://example.com --find-all

Browser Impersonation

# Use curl_cffi for better stealth (slower but more likely to succeed)
caniscrape scan https://example.com --impersonate

Deep Honeypot Scanning

# Check 2/3 of links (more accurate, slower)
caniscrape scan https://example.com --thorough

# Check ALL links (most accurate, very slow on large sites)
caniscrape scan https://example.com --deep

Proxy Rotation

# Use a single proxy
caniscrape scan https://example.com --proxy "http://user:pass@host:port"

# Use multiple proxies (random rotation)
caniscrape scan https://example.com \
  --proxy "http://user:pass@host1:port" \
  --proxy "socks5://user:pass@host2:port" \
  --proxy "http://host3:port"

Proxy rotation features:

• Supports http and socks5 protocols
• Randomly rotates through proxy pool for each request
• Works with all analyzers including WAF detection and headless browser sessions
• Helps bypass basic IP-based blocks and rate limits

CAPTCHA Solving

# Detect and attempt to solve CAPTCHAs
caniscrape scan https://example.com \
  --captcha-service capsolver \
  --captcha-api-key "YOUR_API_KEY"

# Supported services: capsolver, 2captcha
caniscrape scan https://example.com \
  --captcha-service 2captcha \
  --captcha-api-key "YOUR_API_KEY"

CAPTCHA solving notes:

• By default, caniscrape only detects CAPTCHAs
• To attempt solving, you must provide --captcha-service and --captcha-api-key
• Only attempts solving if a CAPTCHA is detected
• Provides deeper analysis of site defenses when solving is enabled

Combine Options

caniscrape scan https://example.com \
  --impersonate \
  --find-all \
  --thorough \
  --proxy "http://proxy1:port" \
  --proxy "http://proxy2:port" \
  --captcha-service capsolver \
  --captcha-api-key "YOUR_KEY"

📊 Difficulty Scoring

The tool calculates a 0-10 difficulty score based on:

Factor	Impact	Version Added
CAPTCHA on page load	+5 points	v0.1.0
CAPTCHA after rate limit	+4 points	v0.1.0
DataDome/PerimeterX WAF	+4 points	v0.1.0
Akamai/Imperva WAF	+3 points	v0.1.0
Aggressive rate limiting	+3 points	v0.1.0
High-tier bot detection (PerimeterX, DataDome, etc.)	+2 points	v0.3.0
Cloudflare WAF	+2 points	v0.1.0
Honeypot traps detected	+2 points	v0.2.0
Canvas fingerprinting	+1 point	v0.3.0
Browser function modifications	+1 point	v0.3.0
Medium-tier bot detection	+1 point	v0.3.0
TLS fingerprinting active	+1 point	v0.1.0

Score interpretation:

• 0-2: Easy (basic scraping will work)
• 3-4: Medium (need some precautions)
• 5-7: Hard (requires advanced techniques)
• 8-10: Very Hard (consider using a service)

🔧 Installation Details

System Requirements

• Python 3.9+
• pip or pipx

Full Installation

# 1. Install caniscrape
pip install caniscrape

# 2. Install wafw00f (WAF detection)
# Option A: Using pipx (recommended)
python -m pip install --user pipx
pipx install wafw00f

# Option B: Using pip
pip install wafw00f

# 3. Install Playwright browsers (for JS/CAPTCHA/behavioral detection)
playwright install chromium

# 4. (Optional) Set up cloud integration
caniscrape init

Dependencies

Core dependencies (installed automatically):

• click - CLI framework
• rich - Terminal formatting
• aiohttp - Async HTTP requests
• beautifulsoup4 - HTML parsing
• playwright - Headless browser automation
• curl_cffi - Browser impersonation
• requests - HTTP client for API

External tools (install separately):

• wafw00f - WAF detection

🎓 Use Cases

For Developers

• Before building a scraper: Check if it's even feasible
• Debugging scraper issues: Identify what protection broke your scraper
• Client estimates: Give accurate time/cost estimates for scraping projects
• Proxy testing: Verify your proxy pool works against target sites
• CAPTCHA assessment: Determine if CAPTCHA solving is required
• Fingerprinting analysis: Understand which evasion techniques you'll need
• Long-term monitoring: Track when sites upgrade their defenses (NEW in v1.0.0)

For Data Engineers

• Pipeline planning: Know what infrastructure you'll need (proxies, CAPTCHA solvers, anti-detection tools)
• Cost estimation: Calculate proxy/CAPTCHA costs before committing to a data source
• Vendor selection: Test different proxy and CAPTCHA solving services
• Protection monitoring: Track when sites upgrade their bot detection
• Historical analysis: Identify patterns in protection changes (NEW in v1.0.0)

For Researchers

• Site selection: Find the easiest data sources for your research
• Compliance: Check robots.txt before scraping
• Anonymity: Test data collection through proxy infrastructure
• Evasion research: Study real-world bot detection implementations
• Longitudinal studies: Track protection evolution over time (NEW in v1.0.0)

For Teams (NEW in v1.0.0)

• Centralized scan management: All team members can view scan history
• Onboarding: New team members see previous scans immediately
• Change alerts: Track when target sites upgrade their defenses
• Collaboration: Share scan URLs from cloud dashboard

⚠️ Limitations & Disclaimers

What It Can't Detect

• Dynamic protections: Some sites only trigger defenses under specific conditions
• Behavioral AI: Advanced ML-based bot detection that adapts in real-time
• Account-based restrictions: Protections that only activate for logged-in users
• Obfuscated custom solutions: Proprietary detection systems with heavy code obfuscation

Legal & Ethical Notes

• This tool is for reconnaissance only - it does not bypass protections
• Always respect robots.txt and terms of service
• Some sites may consider aggressive scanning hostile - use --find-all and --deep sparingly
• CAPTCHA solving should only be used for legitimate testing purposes
• You are responsible for how you use this tool and any scrapers you build
• Ensure your use of proxies and CAPTCHA solving complies with applicable laws and terms of service

Technical Notes

• Analysis takes 30-60 seconds per URL (longer with CAPTCHA solving)
• Some checks require making multiple requests (may trigger rate limits)
• Results are a snapshot - protections can change over time
• Proxy rotation adds latency but improves anonymity
• CAPTCHA solving success depends on service quality and site complexity
• Fingerprinting detection requires JavaScript execution (uses Playwright)

Privacy & Telemetry (NEW in v1.0.0)

• Usage telemetry: Optional, anonymous CLI usage stats
• Scan telemetry: Optional, public scan database contributions
• Cloud integration: Requires account but no personal data is required
• Data deletion: Full GDPR compliance with caniscrape telemetry delete
• See detailed privacy policy at https://caniscrape.org/privacy

🤝 Contributing

Found a bug? Have a feature request? Contributions are welcome!

1. Fork the repo
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

📝 License

MIT License - see LICENSE file for details

🙏 Acknowledgments

Built on top of:

• wafw00f - WAF detection
• Playwright - Browser automation
• curl_cffi - Browser impersonation

📬 Contact

Questions? Feedback? Open an issue on GitHub.

• GitHub Issues: https://github.com/ZA1815/caniscrape/issues
• Cloud Dashboard: https://caniscrape.org
• Documentation: https://docs.caniscrape.org (coming soon)

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Remember: This tool tells you HOW HARD it will be to scrape. It doesn't do the scraping for you. Use it to make informed decisions before you start building.