A stable service, running on the Google App Engine to programmatically retrieve your public IP address in a number of different formats

Plain

Retrieve your IP address as plain text

Path:/plain
HTTP:http://my-ip-is.appspot.com/plain
HTTPS:https://my-ip-is.appspot.com/plain
Response:

XML

Retrieve your IP address as an XML response

Path:/xml
HTTP:http://my-ip-is.appspot.com/xml
HTTPS:https://my-ip-is.appspot.com/xml
Response:

JSON

Retrieve your IP address as a JSON response

Path:/json
HTTP:http://my-ip-is.appspot.com/json
HTTPS:https://my-ip-is.appspot.com/json
Response: