Exchange guide
SharkBetX: our own exchange, built for the lay side
SharkBetX (sharkbetx.com) is the exchange we built ourselves and the one the Oddsmatcher recommends first. It takes Polymarket's order book, the deepest sports prediction-market liquidity there is, and wraps it in a real exchange interface: back and lay, live scores, and a flat 2% commission charged on net winnings only.
Full disclosure: SharkBetX is built and operated by the team behind SharkBetting. We recommend it first because the economics are better for you, and because we can vouch for every layer of it.
Why commission structure decides your profit
In matched and volume betting, the lay commission is a tax on every single trade. Lay a bet with net winnings of 600 euro and you keep 588 on SharkBetX (2%), 585 on BFB247 (2.5%), and 570 on Betfair (5%). Run that over a month of volume betting turnover and the difference is not pocket change; it is often the difference between a good month and a great one.
Just as important is what SharkBetX does not charge. There is no premium charge and no Expert Fee: Betfair's Expert Fee can take up to 40% of net profits from consistently winning accounts, which is exactly what a disciplined matched bettor becomes. On SharkBetX, winning more never raises your rate, and losing bets pay no commission at all.
The Oddsmatcher already prices every opportunity against SharkBetX where it has the market, with the 2% commission baked into the rating, so what you see in the table is what you actually keep.
Getting started in four steps
- 1
Connect a wallet
Go to sharkbetx.com and connect a crypto wallet. There is no lengthy account application: connect, review and sign the terms, and you are in. Desktop is the best experience today.
- 2
Fund with USDC on Polygon
Deposit USDC into your on-chain vault. Holding funds on Ethereum or another chain? The built-in bridge moves them to Polygon. Watch out for the bridged (USDC.e) versus native USDC distinction, and keep a little POL for gas.
- 3
Find the bet in the Oddsmatcher
Open the SharkBetting Oddsmatcher and look at the Lay column. Rows where SharkBetX has the market show its price with the 2% commission already reflected in the rating. Handicap and DNB rows price against Betfair instead.
- 4
Place the lay and let it settle on-chain
Back with the bookmaker, lay on SharkBetX. Settlement is automatic when the market resolves, and every transaction is verifiable on Polygonscan. Winnings land back in your vault balance, ready to withdraw or roll into the next bet.
New to crypto funding? The crypto deposits guide walks through wallets, bridging and stablecoins from scratch.
Markets covered today, and what still needs Betfair
Live on SharkBetX
- Match winner (moneyline), 2-way and 3-way
- Full-time Over/Under 2.5 goals
- Both Teams To Score (full time)
- To Advance / To Qualify in knockout tournaments
- Football (top European leagues and more), NBA, NFL, NHL, MLB, tennis, UFC
Not covered yet
- Handicaps / Asian lines
- Draw No Bet
- Half-time and player prop markets
The Oddsmatcher handles this for you: rows in these markets automatically price the lay leg against Betfair, so you never lose an opportunity while SharkBetX coverage expands.
Liquidity is deepest on popular events (top-league football, NBA, NFL). On smaller leagues the book can be thin, so check the available amount in the Oddsmatcher before committing a large stake, exactly as you would on any exchange.
SharkBetX vs BFB247 vs Betfair
| SharkBetX | BFB247 | Betfair | |
|---|---|---|---|
| Commission | 2% flat, on net winnings only | 2.5% on net winnings | 5% standard |
| Premium charge / Expert Fee | None. Winning more never raises your rate | None | Expert Fee up to 40% of profits above threshold |
| Liquidity | Polymarket order book | Betfair-equivalent pool via Orbit | Betfair pool |
| Account setup | Connect a wallet, sign the terms, deposit USDC | Standard account application | Standard account application |
| Funding | USDC on Polygon (bridge from other chains supported) | Fiat + crypto (BTC, ETH, USDT, LTC) | Fiat |
| Settlement | Automatic, on-chain, verifiable on Polygonscan | Operator settled | Operator settled |
| Markets | Moneyline, full-time Over/Under 2.5, BTTS, To Advance | Full exchange market range | Full exchange market range |
Bottom line: SharkBetX first wherever it has the market, Betfair or BFB247 for handicaps, DNB and anything it does not cover yet.
Frequently asked questions
How much commission does SharkBetX charge?
A flat 2% on net winnings only. Losing bets pay no commission at all, and there is no premium charge or fee tier that punishes winners. Compare that to BFB247 at 2.5% and Betfair at 5% plus the Expert Fee for consistently profitable accounts.
Which markets can I lay on SharkBetX?
Today: match winner (moneyline, both 2-way and 3-way), full-time Over/Under 2.5 goals, Both Teams To Score, and tournament To Advance markets, across 20+ leagues. Handicap and Draw No Bet markets are not covered yet; the SharkBetting Oddsmatcher automatically prices those against Betfair instead, so you always have an exchange leg.
How do deposits and withdrawals work?
SharkBetX runs on USDC on the Polygon network. You connect a wallet, deposit USDC into your on-chain vault, and place bets from that balance. Withdrawals execute back to your wallet on-chain, typically within a couple of minutes. If you hold funds on another chain, the built-in bridge moves them to Polygon. New to crypto funding? Read the crypto deposits guide first.
Is my balance safe?
Your balance lives in a vault smart contract on Polygon, and every deposit, bet settlement and withdrawal is a public on-chain transaction you can verify on Polygonscan. That level of transparency simply does not exist at traditional operators.
Will I get limited for winning?
No. SharkBetX is an exchange: you trade against the order book, not against a bookmaker who profiles winners. Matched and volume bettors are exactly who the product is built for.
Should I still keep a BFB247 or Betfair account?
For handicap and Draw No Bet lays, yes, since SharkBetX does not cover those markets yet. BFB247 at 2.5% commission remains a solid traditional-account option, and the Oddsmatcher lets you compare lay prices from SharkBetX and Betfair side by side and pick the better one per bet.
Lay your next bet at 2%
Open SharkBetX, fund your vault, and let the Oddsmatcher point you at the gaps worth betting.