Web3 security guard right in your MetaMask
Dodge dangerous crypto transactions with Web3 Antivirus Snap for MetaMask real-time risk reports.
Audited by Veridise.
Open-source and Free
Snap is verified by MetaMask and listed in its official Snaps Directory. The Snap only operates publicly accessible data.
scams detection
protected
warnings
Upgrade your wallet, enjoy free protection
W3A Snap instantly discovers and warns you about some of the most common Web3 scams in a simple and straightforward manner.
Wallet Drainers
Alerts on suspicious permissions or approvals.
Wash Trading & Fake Tokens
Flags artificially inflated volumes, cloned tokens, or liquidity traps.
Phishing & Untrusted Contracts
Spots malicious code designed to steal funds.
Transfer to Fake Address
Prevents accidental sends to look-alike or “poisoned” addresses.
Snap in action
Initiate a transaction in MetaMask. Look for the WEB3 Antivirus panel in the transaction details window. Check warnings.
Why it matters
- Real-time risk assessment means fewer mistakes.
- All checks happen inside MetaMask—no extra steps.
Install the Snap in 3 steps
Getting started is quick — no extra downloads or complex setups
Find Web3 Antivirus
Search or scroll to locate “W3A” and check its audit details.
Install & confirm
Approve the Snap; MetaMask will handle permissions and sandboxing automatically.
Browser
extension
Open-source security browser extension that protects your crypto from scams.
W3A
Dashboard
Check your wallet health
Review and revoke token approvals
Upgrade your security with personalized tips
Any questions left?
- MetaMask Snap is a wallet extension that allows you to customize your MetaMask functionality.You can find different Snaps in the official MetaMask Snaps Directory, including those providing transaction risk monitoring, compatibility with various blockchain networks, connectivity with a wide range of dApps, and more.
- When you are about to make a transaction, W3A Snap runs a check of all the contracts, addresses, and assets involved and evaluates their safety. When it detects risks such as honeypots and poisoning attacks, it sends you an instant alert.
- The Snap detects 20+ risks and scams, including:
- Token drainer
- Honeypot scam
- Transfer to a fake address
- Transfer to a scam zero address
- Phishing swap
- Suspected phishing contract
- Potential honeypot
- Approve restriction
- Unsanctioned asset transfer
- Unsanctioned token burn
- Unsanctioned token approval
- Blocked token approval
- Scam token
- ERC-20 malicious transfer
- ETH malicious transfer
- Blocklisted website transaction
- Metamorphic contract
- Suspicious deployer
- Wash trading
- No DEX pair
- Volatile token liquidity
- When you initiate a transaction in Metamask, you will see a tab “WEB3 ANTIVIRUS” in a window with transaction details. There you will find notifications from the Snap.
- Currently, all MetaMask Snaps are only available for the browser extension.
- When it comes to Web3 security, you can never have too much protection. With both the W3A browser extension and the Snap monitoring your transactions, you double your safety measures against Web3 malicious entities.
- Currently, the Snap supports only the Ethereum network, but Polygon, Arbitrum, and BNB chain are coming soon.
- No, under no circumstances. The Snap only operates publicly accessible data, such as blockchain records and open-source smart contract code. It will never request your seed phrase or private key or ask you to grant access to your assets.
- Yes, the Snap is verified by MetaMask and listed in its official Snaps Directory.Plus, we’ve successfully passed the audit by Veridise. You can check the audit report here.Feel free to have a look at the Snap's code.
- If you have any questions or feedback, please contact us via:
Check out our FAQs and visit our Knowledge Base