Memecoins with the S&P 500 underneath.

Specie is a launchpad for memecoins on Robinhood Chain. Every trade of a Specie coin sends 1% of the trade to a hook that buys $SPY — the S&P 500 token on Robinhood Chain — and adds it to that coin's reserve. Any holder can burn their coins at any time and take their share of the reserve.

A usual memecoin has nothing under its price: once the hype is gone, holders can only sell to someone cheaper. A Specie coin keeps its trading history as an asset. Even a forgotten coin still has its reserve, and holders can claim it without needing a buyer.

How it works

1. Launch. A creator picks a name and ticker and launches in one transaction. All 1,000,000,000 coins go into a Uniswap v4 pool paired with ETH. The liquidity is owned by the launchpad contract, which has no function to remove it — it is locked forever, for everyone including the creator and Specie.
2. Every trade. On each buy and sell the hook takes 1% of the ETH side of the trade. In the same transaction, 70% of that fee buys $SPY from the ETH/$SPY Uniswap pool and is credited to the coin's reserve.
3. The floor. The reserve is divided by the total number of coins. That's a price below which selling makes no sense, because you can always redeem at it.
4. Redeem. A holder burns coins and receives reserve × burned ÷ supply in $SPY. No counterparty is involved.

The floor

The floor only moves up, for three reasons:

• Trades add to the reserve. Every buy and sell buys more $SPY.
• The index moves the reserve. The reserve is held in $SPY, so its value follows the S&P 500.
• Redemptions are neutral. Burning x% of the supply pays out exactly x% of the reserve, so reserve-per-coin stays the same for everyone else. Rounding always favours the remaining holders.

Coins sitting in the pool count towards the total supply. When someone buys them out of the pool, nothing changes for the floor; when they're burned through redemption, the matching reserve leaves with them.

Worked example

Illustrative numbers, not a forecast.

The floor is a share of the reserve, not a promise about the market price. For the reserve to equal 3.5% of a coin's value, the coin has to trade about five times its market cap. Active coins build a meaningful floor; inactive ones don't.

Fees

There is one fee: 1% of the ETH side of every swap, on buys and sells, through any router. The pool's own LP fee is zero.

The rate and the split are constants in the hook's code. They cannot be changed after deployment, by anyone.

Buy, sell, redeem

Buying and selling

1. Open a coin in the app and connect a wallet on Robinhood Chain (MetaMask, Rabby or any injected wallet). The app adds the network for you if needed.
2. Enter an amount. The quote shown is exact: the app simulates the real swap, including the 1% fee.
3. Your transaction reverts if the result is worse than the quote minus your slippage setting (1% by default).
4. Selling the first time needs one extra approval transaction.

You can also trade Specie coins through any Uniswap v4 router that supports custom hooks. The fee is identical — it's enforced by the pool, not by our site. Some terminals may not recognise new hook pools at first.

Redeeming

1. In the coin's “Burn to redeem” panel, enter how many coins to burn (or press Max).
2. The preview shows exactly what you'll receive.
3. Confirm. Your coins are burned and $SPY arrives in your wallet in the same transaction.

If the market price is above the floor, selling pays more than redeeming — the app warns you in that case. Redeeming is the exit that's always there, not usually the best one.

If some reserve ETH is still waiting to be converted to $SPY (see deferred buys), redemptions pay your share of that ETH too.

Launch a coin

1. Go to Launch and fill in a name (up to 32 characters), a ticker (up to 12), and optionally an image link and description.
2. Optionally add ETH to buy at launch. The first buy pays the same 1% fee and starts the reserve.
3. Confirm one transaction. The coin, its pool and its locked liquidity are created together.

Every coin starts at the same price: the pool behaves like it has about 1.5 ETH of depth against the full supply, so early buys move the price quickly.

Creator earnings. 20% of the fee on every trade of your coin accrues to the launching address. Claim it on your coin's page (“Creator earnings”) whenever you like. It is paid in ETH.

As a creator you can't pull liquidity, mint more coins, or change any fee. Neither can Specie. That's the point.

The hook

Robinhood Chain uses Uniswap v4, which lets a pool run custom code — a hook — on every swap. Specie's hook does the following, inside the swap itself:

• Fee in ETH, every direction. For exact-input buys and exact-output sells it charges in beforeSwap; for exact-input sells and exact-output buys, in afterSwap. Either way the trader pays 1% of the ETH amount.
• Reserve buy. 70% of the fee is swapped for $SPY in the ETH/$SPY v4 pool (0.1% fee tier) and credited to the coin.
• Deferred buys. The $SPY purchase runs in an isolated call. If it fails — for example while $SPY is paused — the trade still goes through and the ETH is queued for the coin. Anyone can call flush(coin) to convert the queue later; the next successful trade also converts it automatically.
• Locked pools. Only the launchpad can create pools with this hook and add liquidity to them. Nobody can remove that liquidity.

The hook's admin can only change the treasury address and a small minimum-buy threshold (capped at 0.01 ETH) used to batch tiny reserve purchases. The admin has no access to reserves, creator earnings or fee parameters.

Contracts & addresses

Specie

Robinhood Chain (verified on-chain)

Source: three contracts — SpecieToken (fixed-supply ERC-20, burnable), SpecieHook, SpecieLaunchpad. Contract source will be verified on the block explorer at deployment.

Developer reference

SpecieLaunchpad

SpecieHook

Pool key

Every coin's pool: currency0 = ETH (0x0), currency1 = coin, fee = 0, tickSpacing = 200, hooks = SpecieHook.

Events

Launched(coin, creator, name, symbol, image) and Trade(coin, trader, isBuy, ethAmount, coinAmount) on the launchpad (trades through the launchpad only); FeeTaken, ReserveBought, ReserveBuyDeferred, Redeemed on the hook (all trades).

Risks

FAQ