I use icanhazip. It is good; just the plain IP address, no HTML and no JSON. It could be done even simpler by just nc to a specified host and port and no HTTP i

I use icanhazip. It is good; just the plain IP address, no HTML and no JSON. It could be done even simpler by just nc to a specified host and port and no HTTP is needed either; it need not wait for a request and will not need response headers. I made a shell script with: curl -s 'http://icanhazip.com/' | cat -v