How Holder's Watch works
1. You paste a public address
Paste a public address or ENS name. You don't need to know which network your tokens are on: we check the address on every network we watch and show you where we found something. A public address is already visible to anyone on the blockchain, so sharing it with us gives us nothing we couldn't already see. We never need your recovery phrase, private keys or a signature, and we never ask you to connect a wallet.
Using a Ledger or Trezor? Copy a receive address from Ledger Live or Trezor Suite and paste it. You don't need to plug the device in.
2. We find the tokens you hold
We look up every token held at that address using a blockchain data provider and record all of them, then match each one to a known project so we can monitor it. Tokens we can't match yet stay in your list as "not yet identified" rather than disappearing: old, renamed and delisted tokens are often the ones worth looking into. You can refresh a wallet at any time from its page; we also refresh on a rolling schedule.
We currently watch addresses on 26 networks: Ethereum, BNB Smart Chain, Polygon, Arbitrum One, Base, Optimism, Avalanche, HyperEVM, Robinhood Chain, Morph, Mantle, X Layer, Ink, Monad, Fantom, Cronos, Gnosis, Sonic, ZKsync Era, Linea, Berachain, Celo, Blast, Scroll, Unichain, Solana.
3. We check each token for three things
Contract migrations
Projects sometimes move their token to a new smart contract. Tokens on exchanges are usually moved for you, but tokens in your own wallet can be left on the old contract, and a claim window may close. We compare the contract you hold with the project's current contract on each chain. If they differ, we raise an alert.
Delistings
If a token stops being listed by our market data provider, that usually means it has lost its markets or the project has shut down. We raise an alert when a token we were tracking is no longer listed.
Dormant projects
We flag a project as dormant when it has had no code commits in the last four weeks and less than $1,000 of trading in a day. We only flag it when both figures are actually reported: a project with no public code repository is never marked dormant just because the data is missing. A quiet month is a warning sign, not proof, so we describe these with medium confidence.
4. You get an alert
Each detection appears in your dashboard and opens a case file with what we found and a suggested next step. We also email you, as long as you've confirmed your email address and left email alerts turned on in settings.
What we don't do
- We don't send price alerts or trading signals.
- We can't move, freeze or recover tokens, and we never hold funds.
- We don't monitor legal or regulatory news.
- We don't give financial, investment or legal advice.
An alert is a prompt to check the project's official channels, not a recommendation. Always verify a migration through the project's own announcements, and never use a migration link someone sends you directly.