FireHOL IP Lists
Public IP blocklist feeds (ipset/netset files) for attacks, abuse, malware, botnets, open proxies and anonymizers, with per-list history, retention, update frequency and overlap analysis published on iplists.firehol.org and generated into the firehol/blocklist-ipsets GitHub repository. Access is by plain file download; no OpenAPI, AsyncAPI, GraphQL, gRPC or WSDL contract is published, and the docs do not state an API base URL.