What it does
Scam Sniffer provides domain and address threat intelligence for wallet and security teams. Its Chrome extension displays site warnings, checks certain signature requests and shows balance changes for supported actions.
Browser checks at different points
Scam Sniffer says its extension checks sites against its detection data before the page loads. In signing flows it flags risky token approvals and checks NFT listing or offer signatures on services including Seaport and Blur. It can also display balance changes for supported listings, offers and swaps. Scam Sniffer describes phishing coverage across EVM networks, Solana, Bitcoin, TON and Tron; the specific signature checks depend on the action being requested.
Lookups for wallet and security teams
The API accepts domain, URL or address queries. The address-check reference documents an address input and an API key header. Standard plans return a status such as BLOCKED or PASSED, while Enterprise options add detail such as categories, labels or associated transactions where available.
A free public domain blocklist is separate from the paid API. The extension also lists a limited free tier and a Premium tier funded by selected trading fees. Its page currently marks Premium as free, so check the extension's fee notice when using it; the page does not give an end date for that offer.
Strengths
- Warnings cover site visits and supported signing requests.
- Domain and address APIs fit different investigation inputs.
- A public domain blocklist is available separately from paid API access.
Watch out for
- The free extension tier limits monthly detections.
- Detailed API context and bulk-feed options depend on the service tier.
Best for
- Crypto users checking supported browser signing requests
- Wallet teams adding domain or address screening
Sources
- Scam Sniffer intelligence products and pricing (Oct 28, 2026)
- Scam Sniffer browser extension (Oct 28, 2026)
- Scam Sniffer address check API (Oct 28, 2026)