ipify.org

Ever needed to get your public IP address programmatically?

Maybe you're provisioning new cloud servers and need to know your IP -- maybe you're behind a corporate firewall and need to tunnel information -- whatever the reason: sometimes having a public IP address API is useful!

You should use ipify because:

1. You can use it without limit (even if you're doing millions of requests per minute.
2. It works flawlessly with both IPv4 and IPv6 addresses, so no matter what sort of technology you're using, there won't be issues.
3. It's always online and available, and its infrastructure is powered by Heroku, which means that regardless of whether the server running the API dies, or if there's an enormous tornado which destroys half of the east coast, ipify will still be running!
4. ipify is completely open source (check out the GitHub repository).
5. No visitor information is ever logged. Period.
6. Lastly, ipify is open source so there's no need to worry about the domain name disappearing in three years or anything like that: ipify is here to stay!