Using LimeLM API key from Google App Engine

Hello,

I build a google app engine, for my users to retrieve their product keys by email address (for users who lost the email) or to deactivate their acts (in case they sell their computer).

If I reset my last used Ip (api) in my account settings, it works perfectly fine the first time, all the next requests fails due to:An API key must be used by a single device.

It's not possible to set a static ip address to google app engine:https://cloud.google.com/appengine/kb/#static-ip

Any suggestion or workaround?

You need to use Google Compute Engine or another VM / cloud / VPS solution that supports static IP addresses: https://cloud.google.com/compute/docs/ip-addresses/reserve-static-external-ip-address

We limit IP address usage for web API keys in order to maintain end-user data protection.