2025 report: crypto phishing losses fall 83% to $84M.
Read more
Safer browsing and signing for crypto users
The Scam Sniffer extension warns you before you open a scam site or sign a malicious request. It runs on the same data that wallets and security teams query.
How it protects you
Before you open a site
Scam site warnings
Checks each site you open against our scam site detection and blocklists, and warns you before the page loads.
The same data is used by
What it warns you about
Phishing
Wallet drainers on EVM chains, Solana, Bitcoin, TON, and Tron.
Hack
Compromised dapp frontends, supply-chain attacks, and hacked X accounts.
Malware
Fake meeting apps, game installers, and fake browsers that deliver malware.
Before you sign
Signature checks
Risk warnings before you sign
Signature requests are checked against more than 20 known malicious and phishing signature types, and you see the risk before you sign.
NFT listing and offer checks
Checks NFT listing and offer signatures on Seaport, Blur, LooksRare, and Blend before you sign.
Balance changes
Shows how your balances will change for NFT listing, offer, and swap signatures.
Token approvals
Flags risky token and NFT approvals, including Permit and Uniswap Permit2 signatures.
On X
Phishing warnings on X
Flags phishing links in replies from fake accounts and in ads on X.
Many phishing visits start from links posted by fake accounts and ads on X.
Pricing
Free
Core protection for everyday browsing.
$0
- Limited detections per month
- Scam site warnings
- Phishing warnings on X
- Signature checks
Premium
Funded by a small fee on selected trades.
0.25% fee on selected DEX trades. Currently Free
- Unlimited detections
- No ads
- Scam site warnings
- Phishing warnings on X
- Signature checks
- Dedicated support
The extension uses this plan by default.
On X
Malicious app authorizations
Warns you before you authorize a third-party app that could take over your X account.
Phishing posts from well-known X accounts often start with a social engineering attack.