I run a temporary email service and it was a constant battle to block the bots so I built an internal tool to give the IPs a fraud score from 0-100 and limit the fraudulent IPs.

I couldn't use another service for this, as it was way too expensive and I've now turned this tool into a free service that others can use for their own site.

Currently everything is totally free as I haven't put down any time on trying to monetize it. Edit: even if it is monetized in the future (to pay for future server costs), then I will still keep the free plan very open and generous and only heavier users will be charged.

https://ipaddress.to