What's a near foolproof way of detecting a (browser/web) user's region/location/country? The answer is probably some combination of IP address + browser timezone detection. I also remember someone relying on cloudflare response headers. Am curious about what techniques folks are using?

This is going to be increasingly difficult, at best, you may get Country of user, and even that may become inaccurate as people become more privacy aware.

IIRC, when I hosted on AWS Amplify (my front end), the response headers to my backend server contained the client's country. It was quite accurate when I tried it with a VPN service jumping around many countries.

geoIP location is still the way to go

get the paid subscription for Maxmind geoip

cloudflare workers ✋

Sorry for the noob question. When using something like geoip like and @modern-table-48211 and @wide-twilight-82330 suggested, how do you get the client IP for making the API request? Or is it added in the constructed request?

@tall-advantage-5586 most frameworks allow you to access the REMOTE_ADDR of the client accessing the application. In case of proxy / load balancer there the typical standard is to add a

X-Forwarded-For

header with the client's IP.