Google Safe Browsing API
FreeLiveLast verified 24 Sept 2026
Checks URLs against Google's lists of malware, phishing and unwanted-software sites.
Example request
curl -s -X POST 'https://safebrowsing.googleapis.com/v4/threatMatches:find?key=$API_KEY' -H 'Content-Type: application/json' -d '{"client":{"clientId":"yourcompanyname","clientVersion":"1.0"},"threatInfo":{"threatTypes":["MALWARE","SOCIAL_ENGINEERING"],"platformTypes":["WINDOWS"],"threatEntryTypes":["URL"],"threatEntries":[{"url":"http://example.org/"}]}}'Free tier, in plain English
No cost to use the API; Google assigns a default quota per project and lets you request more.
Alternatives in Threat Intel
AbuseIPDBCrowd-sourced IP address reputation and abuse reports for blocking malicious traffic.FreemiumAlienVault Open Threat Exchange (OTX)Looks up threat intelligence on IPs, domains, URLs, and files: malware, passive DNS, and geo data.BinaryEdgeInternet scan and threat-intel data; discontinued as self-serve after Coalition's acquisition.CensysSearch engine for internet-connected hosts: open ports, services, certificates and banners.FreemiumDefend NetworkDaily JSON feed of exploited CVEs with CVSS/EPSS scores and CISA KEV status, no key needed.Free
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