Ifconfig.co – Hacker-friendly “What is my IP address”

It's great to have services like this.

For the benefit of anyone interested: for a "self-hosted" solution, you can do this entirely within Nginx. Here's an example config:

    server {
      listen 80 default_server;
      listen [::]:80 default_server;

      listen 443 default_server;
      listen [::]:443 default_server;

      # Use Letsencrypt for SSL. This part will depend on your own setup.
      ssl_certificate /etc/letsencrypt/live/<my domain>/fullchain.pem;
      ssl_certificate_key /etc/letsencrypt/live/<my domain>/privkey.pem;

      server_name <my domain>;

      # Deny all access at all paths; useful if you're hosting other stuff behind
      # the same Nginx server (e.g. reverse proxy)
      location / {
        deny all;
      }

      # At /ip, return 200 with the client IP address in the body
      location = /ip {
        default_type text/plain;
        return 200 '$remote_addr';
      }
    }

this service does a lot more than just return your remote_ip, which wont work behind a load-balancer or other proxy unless you configure realip module. and also need to add geoip module to do all the location stuff

Good points both.

That said, do you know of any software library that exposes the Geoip database (or at least Geoip Lite which you one easily obtain for free) in a nice API? Like how a lot of programming languages have tzinfo/tzdata libraries for querying the Tz database.

Maxmind do APIs for a bunch of language. I've used the python one and it works well (with Lite), but see here their list:

https://dev.maxmind.com/geoip/geoip2/web-services/

I should clarify that I was looking for an "offline" API/library that I can use against a local copy of the Lite database, but this is great stuff too.