NewLaunch a market

Create a prediction.

Ask a clear yes/no — or multi-outcome — question, seed it with an LMSR liquidity subsidy in test USDC, and it goes live on Base Sepolia (testnet). Launching is switched off on this deployment — you can still shape a market here and see exactly what it would cost.

Market creation is paused

Launching a market is switched off. A market created on this deployment could never be settled — declaring the winning outcome requires a protocol administrator, and no administrator action is possible on these contracts — so the USDC subsidy and creation bond you escrow would stay locked in the market with no way to release them.

New positions, new markets and resolution proposals are switched off while this deployment cannot settle markets; selling out of a position you already hold stays open, so nobody is locked in.

The question

Phrase it so the outcome is unambiguous and verifiable on a set date.

Question

Outcomes

Two for a binary market, up to 32 for multi-outcome.

2/32

Liquidity

The depth of your market — and the USDC you escrow to seed it.

The b parameter sets how much trading it takes to move the odds. A higher b means deeper liquidity and lower slippage for traders — but a larger upfront subsidy from you. The subsidy is b × ln(outcomes).

Liquidity parameter (b)Most binary markets start around 100–500.

Closing & resolution

When trading stops, and how the outcome will be decided.

Trading closesAfter this time, trading stops and the market awaits resolution. This form accepts a close date up to 365 days out — a longer-dated question is better asked as a market created nearer the time.

Resolution sourceHow the outcome will be verified — e.g. Coinbase BTC/USD spot at close.

Banner image

Optional — leave blank to use on-brand category artwork.

Image URLA direct link to an image (png, jpg, webp).

Review & launch

Confirm the shape of your market, then seed it from the panel on the right.

Question: —
Outcomes: 2
Liquidity (b): 100
Network: Base Sepolia
USDC subsidy to seed: $69.31

Normally you collect the creator fee on every trade and the subsidy stays in the market as liquidity. On this deployment a market can never be settled, so the subsidy and bond you escrow would stay locked in it — which is why launching is switched off.

Create a prediction.

Market creation is paused

New positions, new markets and resolution proposals are switched off while this deployment cannot settle markets; selling out of a position you already hold stays open, so nobody is locked in.