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Exposure checker

live It reads public chain data and asks nothing of your wallet.

Paste a Bitcoin, Ethereum, or Solana address and see whether its public key is already visible on-chain, with a short explanation. It reads public data only: no wallet connection, no seed, no signature.

cost
Free, including bulk scans.

Check an address

Public data only. No wallet connection, no seed, no signature.

How it works

  1. Paste

    One address, or up to 50 for a bulk scan.

  2. Read

    z0s looks up public chain data for each address. Nothing is asked of your wallet.

  3. Verdict

    Key visible, key hidden, or no key at all, with the evidence behind it and what that means on that chain.

Rules it applies

  • Bitcoin: hashed address types become visible once the address has spent. Taproot addresses carry the key and are treated as visible. Coins paid straight to a public key are visible; the check looks for these in an address's recent history and can miss very old ones.
  • Ethereum: an account is visible once it has sent a transaction or signed a code delegation. Contracts are shown as their own category. Signatures made off-chain cannot be seen.
  • Solana: a wallet address is the public key, so it is always visible; the result explains the migration path instead of raising an alarm. Programs, token accounts, and program-derived addresses are reported as having no key.
  • A verdict describes what is public on-chain today. It is not a prediction, and "hidden" is not a promise of safety.