7 endpoints • Free forever • No API key

The Free IP
Geolocation API

Get IP details, geolocation, WHOIS, blacklist status, SSL certs, and more. No signup. No API key. Just send a GET request and get JSON back.

$ curl https://whatismyip.technology/api/me
Response
{
  "ip":       "203.0.113.42",
  "country":  "United States",
  "city":     "Dallas",
  "isp":      "AT&T Internet Services",
  "proxy":    false,
  "hosting":  false
}
Read the Docs See Examples
Endpoints

7 Endpoints, Zero Friction

Every endpoint returns JSON. Every endpoint uses GET. None of them need an API key.

GET

/api/me

Your IP address, location, ISP, VPN detection. Auto-detected from the request.

GET

/api/ip-lookup

Full geolocation for any IP address in the world. Same data as /api/me but for others.

GET

/api/whois

WHOIS/RDAP data for any domain or IP. Registrar, dates, nameservers, abuse contact.

GET

/api/blacklist

Check 15 DNSBLs for spam and abuse listings. Find out if your IP has a bad reputation.

GET

/api/port-scan

Check if a TCP port is open on any host. 2.5 second timeout, blocks internal ranges.

GET

/api/ssl-check

SSL certificate details, expiry dates, issuer info, SANs. Via Certificate Transparency.

GET

/api/http-headers

See every HTTP header your client sends. User agent, accept headers, the whole lot.

Examples

Works With Everything

Pick your language. Copy the code. It works.

curl -s https://whatismyip.technology/api/me | jq .
Ecosystem

Part of Something Bigger

Three sites. One mission. Make networking tools and knowledge actually accessible.

Tools

whatismyip.technology

15 free browser tools. Check your IP, test your VPN, scan ports, inspect headers. No signup.

Wiki

whatismyip.wiki

48 articles explaining networking. IP addresses, DNS, VPNs, protocols. No corporate bias.

API

whatismyip.codes

You're here. The free IP geolocation API. 7 endpoints, zero friction.

FAQ

Things Developers Actually Ask

No. We don't have API keys. We don't have a signup page. We don't have a "developer portal" where you create an "application" and wait for "approval." You make a GET request. You get JSON. That's the entire developer experience.
We don't publish a hard number because we don't want people writing code that hits exactly 999 requests per minute. Be reasonable. If you're building a normal app, you'll never hit a limit. If you're trying to scan the entire IPv4 address space, maybe don't.
No. There is no paid plan. There is no "Enterprise" tier. There is no "Contact Sales" button. The API is free. If that changes, we'll give you six months notice and probably apologize a lot.
Yes. Build a SaaS. Ship a mobile app. Power your startup's IP detection. We genuinely don't care what you build with it, as long as you're not reselling the raw data or pretending to be us.
City level, roughly 25 to 50 miles. We can tell you're in Dallas, not which Starbucks you're sitting in. IP geolocation is an educated guess based on ISP registry data, not GPS. If a movie shows someone finding an exact address from an IP, that movie is lying to you.
The catch is that we use this API ourselves for whatismyip.technology, which is how we test and improve our tools. You get to use it too. The server costs less than your Netflix subscription. If it becomes a problem, we'll figure it out. It hasn't been a problem.