VPN & Proxy Detection APIs
These APIs flag whether an IP address belongs to a VPN, proxy, Tor exit or datacenter, a different question from where it is located. IPLogs is free and checks each request against 25+ network and client signals. IP99 adds proxy and datacenter risk scoring to city-level geolocation without a key, and IP-API.io offers VPN, proxy and Tor detection with risk scoring on paid plans only.
| API | Pricing | Auth | Format | Free tier | Status |
|---|---|---|---|---|---|
IP-API.ioIP geolocation with VPN, proxy, Tor detection and risk scoring, paid plans only. Location & Mapping › IP Geolocation | Paid | API key | JSON | — | Live |
IP99IP address risk scoring — proxy, VPN, and datacenter detection — plus city-level geolocation, no key needed. Location & Mapping › IP Geolocation | Freemium | None | JSON | 1k–10k/day | Live |
IPLogsDetects VPN, proxy and Tor traffic per-request using 25+ network and client signals. Identity & Security › Threat Intel | Free | None | JSON | Unlimited | Untested |
IP-API.ioPaidLive
IP geolocation with VPN, proxy, Tor detection and risk scoring, paid plans only.
API key · JSON
—
no machine-readable spec
IP99FreemiumLive
IP address risk scoring — proxy, VPN, and datacenter detection — plus city-level geolocation, no key needed.
None · JSON
1k–10k/day
OpenAPI spec · MCP server · llms.txt
IPLogsFreeUntested
Detects VPN, proxy and Tor traffic per-request using 25+ network and client signals.
None · JSON
Unlimited
llms.txt
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Choosing a VPN & Proxy Detection API
Is there a free VPN & Proxy Detection API?
Yes. IPLogs is free to use, and IP99 has a free tier alongside paid plans.
Which VPN & Proxy Detection APIs work without an API key?
IPLogs and IP99 need no key or sign-up, so you can try them with a plain request.
Can I call a VPN & Proxy Detection API from front-end JavaScript?
IP99 allows cross-origin requests and needs no key, so it works straight from the browser. For the others, call them from your server so your key stays private.
Can I use VPN & Proxy Detection APIs in a commercial project?
IPLogs, IP99 and IP-API.io permit commercial use.
Which VPN & Proxy Detection APIs work with AI agents?
IP99 has both an MCP server and an OpenAPI spec.
Broader: IP Geolocation APIs · Location & Mapping APIs
More in IP Geolocation: ASN Lookup APIs