Free IP tool
Check whether an IP is an anonymous proxy concealing its user’s real address. See the proxy type and a confidence score in seconds.
Overview
An anonymous proxy hides the real IP address of the person behind it, so the destination server only sees the proxy. “Elite” or high-anonymity proxies go further and strip the headers that would reveal a proxy is in use at all. An anonymous proxy checker tests an IP for these behaviours and tells you whether the address is concealing its true origin, so you can decide how much to trust the request.
Signals
Anonymity levels differ, so we look for both obvious and hidden proxies.
Missing or forged forwarding headers that signal high-anonymity proxies.
Detection of reachable anonymous proxy endpoints.
Membership in proxy pools and prior anonymising behaviour.
Correlation with Tor exit nodes and known relays.
Hosting vs. residential ownership of the IP.
A 0–100 score reflecting how certain the proxy verdict is.
API
curl -H 'Authorization: Bearer YOUR_API_KEY' \ 'https://ipscanner.io/v1/proxy/185.220.101.1'
One request, one verdict. A free key gets 7 days of Starter, then 1,000 lookups a month with no card, and every response carries the network class and a confidence score.
Use cases
Treat anonymised orders and signups with extra caution.
Reduce abuse from users hiding behind proxies.
Restrict sensitive actions from anonymising IPs.
Confirm whether a suspicious IP is concealing its origin.
FAQ
IPScanner
Teams use IPScanner to tell real users apart from masked and automated traffic.
Verdicts come with a 0 to 100 confidence score, so you tune the threshold to your own risk instead of trusting one number.
The API runs on infrastructure sized for production traffic, with a 99.9% uptime target for business-critical use.
We refresh VPN, proxy, and Tor lists continuously, so newly spun-up servers get caught quickly.
A plain REST API works with any language or framework. Most teams are live the same afternoon.
Worked examples in curl, JavaScript, and Python, plus straight notes on what each signal does and doesn't mean.
Support comes from engineers who work on IP detection every day, not a generic help desk.
New accounts get 7 days of Starter from their first request. No card, and your key is on screen as soon as you sign up.