Madhouse WalletWeb3 Scanner

Any wallet · Any chain

Scan any wallet.
Screen anyone.

Detect toxic wallets with Web3 Antivirus, and screen people and entities against 1.3M+ sanctioned entries from OFAC, the EU, the UN and 330+ further sources. Paste an address or a name to start.

Narrows common-name matches. Requires 2+ shared words with a sanctioned address.

Powered by OpenSanctions · OFAC SDN, EU Sanctions, UN List, 330+ sources.
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Built for

Before you send

Check a counterparty wallet before releasing funds. A non-zero risk score is a reason to stop and look closer.

Compliance pre-screen

Run a sanctions check before committing to an expensive manual review. Clean entities clear quickly; matches come back with full dataset provenance.

Investigating an address

Resolve an ENS name, see whether an address is a contract, and read the risk traits that fired and the categories its funds moved through.

Wallet risk

On-chain risk signals for any EVM address or ENS name.

  • A 0–1 risk score with a PASS / LOW / MIDDLE / CRITICAL band.
  • Each individual risk trait that fired, rather than just a total.
  • USD inflow and outflow broken down by risk category.
  • ENS resolution, and whether the address is a contract.

Sanctions screening

Screen a person or entity against global sanctions lists.

  • 1.3M+ entries from OFAC SDN, EU Financial Sanctions and the UN Consolidated List.
  • 330+ further sources via OpenSanctions, refreshed weekly.
  • Every match returned with its topics, what it matched on, and which dataset it came from.
  • Narrow by country, date of birth or address to clear false positives on common names.
Web3 AntivirusOn-chain risk signals, 16+ chains
OpenSanctions1.3M+ entries, updated weekly
FastMost checks return in under a second
No accountNothing to sign up for, nothing stored