SharkBetX

The core product is the exchange, and it looks and behaves like a modern betting exchange, with the mechanics professionals expect. If you've used Betfair or an Orbit-based exchange, you'll be placing bets within minutes.

The commission model will feel familiar too: a flat 3% on net winnings, charged only when a bet wins. What's different is everything underneath it: namely Polymarket liquidity, self-custody, and no operator reserving the right to slap a premium charge on consistent winners.

Exchange odds, not bookmaker odds. Prices on Polymarket are set by traders buying and selling outcome shares between $0.01 and $0.99, where the price simply is the implied probability. There's no built-in bookmaker margin to overcome, so the headline prices are routinely sharper than a fixed-odds book.

Polymarket-grade liquidity. Market depth comes from Polymarket, which on major fixtures is the deepest sports prediction-market liquidity available anywhere. For a volume bettor, this is really the point: you can get size matched without walking the price.

Optimized execution. SharkBetX adds smart order routing over the Polymarket order book, so your bet is worked into the market for a cleaner fill than you'd get clicking a raw market card by hand.

Honest caveat: because SBX rides Polymarket's books, depth and availability follow Polymarket. For the big leagues that's a strength; for an obscure fixture with no Polymarket market there's simply nothing to bet on, so check the match is listed before you plan around it.

SharkBetX is non-custodial. Your funds sit in a SharkBetX-deployed vault smart contract on Polygon, and the code enforces that only you can withdraw your own funds. Betting moves your USDC through Polymarket's own unchanged contracts, and the operator never holds your balance on a company ledger.

The economics are unusually clean, and they're modelled on the one exchange every serious bettor already knows: Betfair. A flat 3% commission applies to your net winnings, and only on bets that win. The headline prices carry no bookmaker margin, so the 3% is the whole cost of the product.

Nothing on losing bets, nothing on your stake. A losing bet costs you only your stake, with no charge layered on top. And unlike Betfair, there's no premium charge: winning more never makes it more expensive. Because settlement is on Polygon, gas runs well under $0.01 per transaction.

Here's the math: stake $100 at decimal odds of 2.00 and win, and your gross profit is $100. Commission is 3% of that profit, so $3, leaving you $97 net. Lose the bet and you simply lose the $100 stake, with no commission at all.

Funding is crypto-native. You need three things: a browser wallet, Bridged USDC (USDC.e) on Polygon, and a little POL for gas (around 1 POL, roughly $0.30, is plenty). Deposits and withdrawals are on-chain, land in seconds, and cost fractions of a cent.

The single biggest footgun is the difference between bridged and native USDC on Polygon. The SharkBetX vault takes bridged USDC.e (the contract ending …4174); the wrong, native token ends …3359. Wallets label the right one differently: Rabby calls it "USDC (Bridged)", MetaMask shows "USDC.e", Rango lists "USDC (PoS)". Match the token, chain and contract exactly, every time.

There's no registration in the traditional sense, so no form and no KYC. The whole flow is wallet-first, and most users are placing a first bet within minutes of installing a wallet.