Google Safe Browsing API Key
Google requires you to have a Google account and a Safe Browsing API key to use their Safe Browsing Lookup Service.
Get your API key here: https://developers.google.com/safe-browsing/key_signup
Google works to provide the most accurate and up-to-date phishing and malware information. However, it cannot guarantee that its information is comprehensive and error-free: some risky sites may not be identified, and some safe sites may be identified in error.