ERC-8056 is the Scaled UI Amount extension for EVM tokens. It lets a token hold a multiplier, so the amount a holder is credited with is their raw balance times that number rather than the raw balance itself.
Small as that sounds, it decides whether corporate actions are practical on chain or prohibitively expensive.
The problem it solves
A dividend or a split has to reach every holder. Without a multiplier, the only way to do that is to mint tokens into every wallet, one transfer at a time.
For a token with ten thousand holders, a single 4-for-1 split means ten thousand transfers, ten thousand gas fees paid by somebody, and ten thousand entries in the chain's permanent history that are bookkeeping rather than anybody moving value. A partial failure halfway through leaves the holder set inconsistent. Then it all has to happen again on the next action.
With a multiplier, the same split is one transaction that changes one number.
CRWD's 4-for-1 on Robinhood Chain went from 1 to 4 that way. ORCL's distribution moved the same number up by about 0.22 percent. Nothing was minted, burned or moved in either case, and both transactions are public.
What it changes for a holder
Your raw balance stops being the number you care about. Your position is the raw balance times the multiplier, and the multiplier is what moves when the issuer acts.
Because the number lives on the token, a wallet that reads the extension shows the scaled amount without being told to. A holder does not have to know any of this to see the right number.
A wallet that does not read the extension will show the raw balance, which after a few actions is not the position. The extension being on the token is necessary, and it does not guarantee your particular wallet displays it.
The variant that catches people out
Solana has an equivalent, also called Scaled UI Amount, used by Backed for its xStocks mints.
Ondo Global Markets does something related but structurally different, keeping the figure in a separate contract rather than on the token, and publishing a synthetic share value per instrument. The arithmetic matches and the location does not, which has a real consequence: with the figure outside the token, no wallet shows the change, because the token itself never changed. An Ondo holder's balance and displayed amount both stay put through a distribution.
Dinari does not use a multiplier for dividends at all. It states it pays cash dividends to the wallet as a stablecoin, and rebases for splits.
"Does this token use ERC-8056" therefore has four different answers across four issuers, and this site prints the mechanic on every row rather than assuming one.
A note on what we do and do not claim
We render a mechanic kind, which is a different thing from certifying which standard a contract implements. Only some of these tokens implement the ERC-8056 interface. Ondo's are plain ERC-20s with the figure in an oracle, and Backed's are Token-2022 mints using Solana's extension. Our data model records the shape we display, and where we say "UI multiplier" we are using the issuer's own label.
That distinction matters if you are building on our data. The tagged union in the JSON API reflects it: a listing with no multiplier has no multiplier field, rather than a field set to 1.
Where to look
/developers/contracts has every address, and the events page has every corporate action we hold a transaction for. The glossary defines UI multiplier, synthetic share value and distribution, and methodology covers how we read each one.