You can now whitelist the domains and IP addresses from where your API key will be used! This can protect your API key from quota theft if it is ever exposed or if you use the API client-side. This feature is limited to paid plans. Contact support to enable protection for your API key.
You have the option to restrict usage of your API Key to a list of domains or IP Addresses. To enable this for your API Key, send an email with your request to email@example.com
You can also limit the number of times any one IP Address can make calls using your API Key. To enable this for your API Key, send an email with your request to firstname.lastname@example.org