8 datasets queried
167.167.5.131
167.167.5.131
That is a lot of lookups in an hour. The home page's lookup box can confirm you are a person and carry on; an API key has no such limit.
00 · No key
Start without signing up.
Paste it into a terminal — no account needed. 1k daily allowance per user, answering ip and is_vpn.
curl "https://api.vpndetection.io/45.83.91.1"
{"ip": "45.83.91.1","is_vpn": true}
01 · Free key
Signup for 50k req/month.
No card, no sales call — the key is issued on signup.
Every request flags VPN IPs.
Upgrade only when you outgrow the allowance.