PROXYRADAR GUIDES
Understand the signal.
Build the right response.
Practical answers for developers working with proxy, VPN, Tor and hosting traffic. Start with the question you are trying to solve.
How to Check If an IP Is a Proxy or VPN
Learn what proxy, VPN, Tor and hosting results mean, how to check IPv4 and IPv6 addresses, and how to interpret residential proxy and crawler signals.
Read the guide →PRACTICAL GUIDEHow to Choose a Proxy & VPN Detection API
Evaluate a proxy detection API by its response fields, IPv6 support, error handling and cost. Use a practical integration checklist and evaluation matrix.
Read the guide →PRACTICAL GUIDEHow to Block Proxy & VPN Traffic Without Blanket Bans
Build a practical policy for proxy, VPN, Tor and hosting traffic. Learn when to allow, verify, rate limit or block, and how to handle uncertain results.
Read the guide →CODE & INTEGRATIONProxy Detection in Python, Node.js & PHP
Copy server-side proxy detection examples for Python, Node.js and PHP. Authenticate securely, validate API responses and handle rate limits and timeouts.
Read the guide →Ready to implement? Download our WordPress, Cloudflare Workers, Node.js and bulk-checking integrations.
Want to check a single address?
The browser checker is a quick way to explore a result before integrating the API.