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What is SubSniper?
SubSniper is a subdomain takeover scanner built as a single-file, zero-dependency Python tool (pure stdlib — no pip installs).
Pipeline: passive enumeration (crt.sh, OTX, urlscan, RapidDNS) → DNS triage (live/dangling classification) → raw-UDP CNAME extraction (no dnspython needed) → HTTP fingerprinting against 40+ takeover signatures (AWS S3, Heroku, Vercel, GitHub Pages, Azure Cloud, Pantheon, Shopify, Zendesk, Fastly, Surge.sh, …) → markdown + JSON reports.
It also flags live hosts whose CNAMEs point at claimable services (wildcard cases).
MIT licensed. Fits the list's format — one line, same style as the other entries. Happy to adjust the description if needed.