http://gamelcamel.pythonanywhere.com
This is an extemely simple web microservice written in python/Flask which displays the visiting user's IP address.
The IP is also available in JSON format by visiting http://example.com/api or clicking the API button.
The source is made available under the GPL.
If using behind a proxy you may need to change the environment request in app.py from REMOTE_ADDR to HTTP_X_FORWARDED_FOR.
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