Jupiter

Jupiter is the Solana app known first for token swaps, perps and lending, and its Predict tab extends that same interface to binary event markets by aggregating liquidity from Polymarket and Kalshi into a single order book. A trader opening a YES or NO position through Jupiter is routing an order into Polymarket's own book under Jupiter's builder code, not trading on a separate venue; the wallet connects once and the same session covers swaps, staking and prediction markets side by side.

On our index Jupiter sits at #10 by all-time attributed volume, with $135.6M routed since 2026-04-28 and $3.2M over the most recent week through 2026-09-14. That week produced 23.2K fills at an average size of $199, and 79.7% of the volume opened new positions rather than closing them, which points to a base that treats Predict as an entry point more than an exit.

A trader reaches Predict by connecting a Solana wallet to jup.ag, the same connection used for the site's spot, perps, and lending tabs; there is no separate app or login for prediction markets. Opening a position means buying a YES or NO contract priced between essentially nothing and a dollar, with that price standing in for the market's implied probability, funded from JupUSD or USDC already in the connected wallet.

Behind that single interface, Jupiter's prediction product does not run its own order book. Its documentation states the API aggregates liquidity from Polymarket and Kalshi and uses a keeper network to match and fill orders, so an order placed on jup.ag can land on Polymarket's book under Jupiter's builder code rather than staying inside Jupiter. The architecture the docs describe threads a trade through events, markets, orders, positions and a vault component before settlement.

Settlement happens onchain: winning contracts pay a dollar each with no claim fee, and losing contracts expire worthless. The docs do not describe a separate custodial deposit step beyond the wallet connection itself, and access is blocked for IPs in the United States and South Korea regardless of where the underlying market is domiciled.

• Cross-venue liquidity aggregation

  Matches orders against both Polymarket and Kalshi order books through a keeper network, so a single trade can draw on either venue's depth.

• One wallet, every product

  The same Solana wallet connection that covers swaps, perps and lending also covers Predict, so a trader never leaves jup.ag to place an event bet.

• Fee-free winning payouts

  Winning contracts settle onchain for a full dollar each, and the docs state there is no claim fee charged at payout.

• JupUSD or USDC funding

  Positions are funded straight from JupUSD or USDC already sitting in the connected wallet, skipping a separate deposit or top-up step.

Solana-native swap traders

Already holding JupUSD or USDC in a Solana wallet, these traders can open an event position without bridging funds to a Polymarket-specific app.

Traders who want one dashboard

Anyone tracking swaps, perps and lending in one portfolio view can add prediction markets to the same screen instead of opening Polymarket separately.

Retail-sized position takers

The average fill on Jupiter's Predict tab sits at $199, in line with a crowd placing dollar-scale bets rather than desk-sized orders.

Traders comfortable with an aggregator

Since Predict routes into Polymarket's own book under Jupiter's code, this suits traders fine with an extra layer between them and Polymarket directly.

Traders who enter more than exit

With 79.7% of routed volume opening rather than closing positions, Predict currently attracts traders using it mainly to get into a market.

Jupiter's docs are specific about one fee only: settlement pays a full dollar per winning contract with no claim fee taken at payout. Nothing in the evidence states what Jupiter charges to open or manage a position, and the operator publishes no separate fee schedule for Predict the way it does for swap routing. Polymarket's own per-market trading fee applies the same way regardless of which builder routes the order, so it is not a Jupiter-specific number and not a reason to prefer or avoid this tool. Before funding a position, a trader should read the quoted price and any fee line jup.ag shows at order confirmation rather than assume the payout terms cover the whole cost.

• Consolidates swaps, perps, lending and prediction markets into one Solana wallet connection, cutting the friction of juggling separate apps.
• Aggregates liquidity from both Polymarket and Kalshi, so a single order can draw on more depth than either venue alone.
• Pays winning contracts a full dollar with no claim fee at settlement, according to the operator's own documentation.
• Settles onchain through Solana rather than through an opaque ledger, keeping the payout mechanism described in public docs.
• Funds positions directly from JupUSD or USDC already in the wallet, without a separate deposit step.

• Publishes no fee schedule for opening or managing a Predict position, leaving cost to whatever the interface shows at confirmation.
• Blocks IPs from the United States and South Korea, cutting off two major trader populations entirely.
• Routes orders through a keeper network and Polymarket's own book rather than matching them directly, adding a layer between the trader and the venue actually holding the market.
• Runs Predict as a beta product still subject to breaking changes, per the operator's own documentation.
• Recent activity is thin: 1 mean traders per day and 1 wallets in the thirty-day cohort mean a handful of accounts account for most of the flow.

Jupiter's own docs describe a wallet-connect flow rather than a separate custodial deposit: a trader funds positions from JupUSD or USDC already held in their connected Solana wallet, and the architecture routes trades through events, orders, positions and a vault component before onchain settlement. Beyond that, the documentation stays quiet on custody specifics, and the Prediction Market API itself carries a beta label with breaking changes still expected. Positions depend on a keeper network matching orders against Polymarket and Kalshi liquidity behind the scenes, which is a layer a trader cannot see or audit directly from jup.ag. Access is also geofenced out of the United States and South Korea.

Jupiter's Predict tab is a convenience play: it puts Polymarket-linked prediction markets inside the same Solana wallet session already used for swaps, perps and lending, settling through JupUSD with no payout fee stated. That convenience comes bundled with an unpublished trading fee, a beta label on the API itself, and activity that recently ran through 1 traders a day. It suits a Solana-native trader who already lives on jup.ag and wants event markets without switching apps. A trader focused purely on Polymarket depth, lower friction to the source venue, or a track record beyond a beta label should look elsewhere.

• Is Jupiter the same thing as Polymarket?

  No. Jupiter is a Solana app whose Predict tab aggregates liquidity from Polymarket and Kalshi through a keeper network, so an order placed on jup.ag can route into Polymarket's own book under Jupiter's builder code.

• Does Jupiter publish a trading fee for prediction markets?

  The operator does not state a fee for opening or managing a Predict position; its documentation only confirms that winning contracts pay a full dollar each with no claim fee at settlement.

• Can traders in the United States use Jupiter's prediction markets?

  No. The operator's own documentation states plainly that IPs from the United States and South Korea are restricted from accessing the Prediction Market API entirely, regardless of where a trader's wallet is otherwise based.

• Does Jupiter hold custody of a trader's funds?

  Its docs describe a wallet-connect flow, funding positions from JupUSD or USDC already in the trader's own Solana wallet rather than a separate deposit, though custody specifics beyond that are not detailed.

• How is Jupiter different from a Polymarket-only terminal?

  Jupiter bundles Predict alongside swaps, perps, lending and staking in one Solana wallet session, while a Polymarket-only terminal is built around Polymarket's book alone without the wider app around it.

• How active is Jupiter's Predict market right now?

  Through 2026-09-14, Jupiter had routed $3.2M over the prior week at 23.2K fills, with a mean of 1 distinct traders a day, a thin, concentrated pace rather than a broad crowd.

• What happens to a winning Predict contract?

  The docs state it settles onchain for a full dollar with no claim fee, paid out once the underlying event resolves according to the market's stated rules.