Free IP tool
Enter an IP to check whether it is a proxy, what type it is, and how confident the verdict is, then automate the same check through the API.
Overview
To detect a proxy from an IP you check whether the address is relaying traffic on behalf of someone else. That means testing for open proxy endpoints, matching against residential and datacenter proxy pools, correlating with the Tor exit list, and inspecting forwarding headers and timing. The proxy checker above runs these checks instantly and returns the proxy type and a confidence score.
Signals
Proxies leave several traces, the verdict weighs all of them.
Exposed HTTP/HTTPS and SOCKS proxy services on the IP.
Presence in residential or datacenter proxy provider pools.
Match against the live Tor exit-node list.
Headers that reveal relayed or chained requests.
Hosting vs. residential ownership of the range.
A clear proxy type label plus a 0–100 confidence value.
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
Add friction when a request comes through a proxy.
Block proxied spam at the source.
Stop proxy-based circumvention of regional rules.
Quickly triage a suspicious IP during an incident.
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.