How Marcet works

Overview

Marcet is the first prediction market on Arc. You pair a Yes/No question to a coin that already lives on Arc. The token stays on Arc. The book lives here. You never buy or sell that coin from this interface — you trade whether the event happens.

Launchers write the question. Traders take Yes or No. Creators earn a cut of the book they open. Marcet does not mint tokens, run a curve, or custody funds. Your wallet signs. The desk quotes the outcome.

What is live

Marcet is live on Arc. Connect a wallet, paste an Arc CA, write the question, and sign. Yes/No books open on that pair. Wallet connect is real. Your wallet signs every launch and fill.

• Connecting a wallet

  MetaMask, EIP-1193, on Arc.
  Test-Net
• Launching a market

  Anyone with a connected wallet can pair an Arc coin and open a book.
  Test-Net
• Yes/No trading

  Buy Yes or No on any book from a connected wallet.
  Test-Net
• Arc quotes and progress

  Market cap, price, and tape for the paired coin when available.
  Test-Net
• Spot buy / sell of the Arc token

  Trade that coin on Arc. Marcet does not quote it.
  Never
• Simulated activity / ranks tape

  Fake fills and leaderboards are paused until mainnet.
  Off
• On-chain market broadcast from Marcet

  The hook that submits from this interface is not attached.
  Not yet
• Oracle resolution

  Questions are paired in the UI. Automatic resolution is not attached.
  Not yet
• Comment threads

  No on-chain source and no database.
  Not yet

Launching

A Marcet launch is three steps: paste an Arc CA, write the question, sign. You do not deploy an ERC-20, and you do not name or ticker a token. Those already live on Arc. If you create the market, you earn 1% of the Yes/No volume generated on that book. The book opens the moment you sign.

Who can launch: connect a wallet and pair a question. Anyone can trade Yes and No on books other people create.

Who can launch

Anyone

Connect a wallet and pair a question.

Arc contract

Required

The existing token on Arc. Marcet pairs a book to it.

Question

Required

The Yes/No market. It opens when you sign.

Creator fee rewards

1% of volume

If you created the market, you earn 1% of the Yes/No volume generated on that book.

Launch fee

0.0005 USDC

Paid when a market broadcast is live. This UI only signs.

Yes/No taker

1.00%

Charged on every Yes or No fill.

Arc coins

Every market is paired to an Arc coin. Chart, market cap, and tape on a Marcet page are that coin's context, not a trade ticket. Marcet only quotes Yes and No.

Markets

One desk: Yes / No. Yes pays $1 if the event happens. No pays $1 if it does not. The question is written at launch and cannot be edited afterwards.

• The Arc CA is the pairing. Marcet does not mint, migrate, or sell that token.
• Yes and No open the moment the market is signed.
• Resolution is not automatic yet. The question is the narrative until an oracle is attached.

Fees

Yes/No taker

Charged on every Yes or No fill.

1.00%

Creator fee rewards

The market creator earns 1% of Yes/No volume generated on their prediction.

1% of volume

Market launch fee

Marcet, when broadcast is live

0.0005 USDC + gas

Spot venues still charge their own fees if you trade the token elsewhere. Those never pass through this UI.

Risks

• A Yes/No share can resolve to zero. Being early does not mean being right.
• The paired Arc coin can go to zero. That is not a Marcet position, but it is the story of the pair.
• Oracle gaps, sequencer downtime, and smart-contract bugs are part of the surface.
• This interface is not an official Circle product. Arc is the settlement layer, not the operator.

FAQ

Disclaimer

Nothing on Marcet is investment advice, a solicitation, or an offer of a security or derivative in any jurisdiction. Arc tokens are experimental. Prediction markets can return zero. Read the terms and privacy policy before you connect a wallet.

Built for Arc (chain 5042). Not investment advice. @marcet