Paste a wallet address. No key, no connection, nothing granted to us.

No, and that is the point of shipping this first. A wallet address is public information — every block explorer already shows its entire history to anyone who types it in. Reading one needs no credential, so there is no credential of yours for us to store, leak or misuse. Exchange API sync is a different thing entirely: it means holding a key that exposes your whole account, and we are not doing that until it lives somewhere that deserves it. Nothing you paste here can move a coin.

No. An address is a public identifier, not a key. Reading it is exactly as capable of moving your money as reading your bank's street address is. If any crypto tax product ever asks you for a seed phrase, a private key or a withdrawal-enabled API key, close the tab.

Every native ETH transfer in or out, every ERC-20 token transfer in or out, and the gas paid on the transactions you sent — including gas on contract calls that moved no tokens at all, which is money that left your wallet and which most importers quietly lose. Each row keeps its transaction hash, so every number in the finished workpaper traces back to a line you can look up yourself.

Because a chain records movement, not intent. ETH leaving your address might be a sale, a payment, a gift, or you moving your own coins to your own exchange account, and the chain cannot tell you which — only you can. Booking every outgoing transfer as a disposal invents proceeds and tax you may not owe. Ignoring it hides a disposal you do. So every movement enters as a transfer, the ones we can match against your other sources are matched automatically, and the rest become a question with your options and their consequences spelled out.

As what it is: crypto you spent. Paying a fee in ETH disposes of that ETH, so it consumes the lots it came from and is reported at the fair market value of the gas, which is the mainstream US treatment of spending property. If we cannot document a price for that day, we still consume the coins — pretending they are still in your wallet would leave basis behind that no longer exists and understate every later gain — but we book it at basis so it moves no tax in either direction, and we say so.

They are imported and named, not counted as income. A real address collects unsolicited tokens by the dozen, most of them designed to be noticed. Treating them as income at receipt invents tax on something you never asked for and may have no legal claim to; deleting them loses the disposal if you ever sell one. So they arrive as receipts you have not classified, and the scan lists which symbols they are so you can dismiss the lot in one look.

Six: Ethereum mainnet, Base, Optimism, Arbitrum One, Polygon and Gnosis Chain. Your address is the same string on all of them and usually holds different things on each, so you pick the network rather than us guessing — reading the wrong one would return a clean, confident, empty answer, and 'your wallet is empty' is the most damaging wrong answer available here. Bitcoin and Solana are next; paste one of those and you can leave an email to hear when it opens.

Yes, and it is the kind of detail that quietly ruins a ledger. Gas on Polygon is POL and on Gnosis it is xDAI. A reader that labelled every fee 'ETH' would consume your Ethereum lots to pay a Polygon fee — a wrong number produced silently, which is the one failure this codebase does not accept. The native coin travels with the chain, so a Polygon fee disposes of POL and nothing else.

That is the case worth doing. Coins bought on an exchange, withdrawn to a wallet and sold from the wallet have their cost in one place and their sale in the other. Read apart, both are wrong — and the 1099-DA reports the sale with a blank basis, which is the overstatement this whole product exists to fix. Save your scan (free) and add the address; the ledger is rebuilt whole, the withdrawal matches the deposit, and the real basis carries across.

One address and one network per source — add the same address again on another network if it holds coins on both — and a bound of a few thousand movements per read so a scan always finishes. If your address is busier than that we tell you the read was truncated rather than silently handing you a partial ledger — an incomplete import that looks complete is the one outcome worse than no import.

It is stored as the name of that source on your scan, the same way an uploaded file keeps its filename, so you can see what your ledger was built from. An unsaved scan and everything in it is deleted after seven days. Nothing is shared with the explorer beyond the address itself, which is what you would type into it anyway.