Connect and choose a sport
CALCEX loads the active sport list live and scans the selected market.
CALCEX excludes stale bookmaker updates and, by default, any event whose scheduled start time has passed.
Manual scan only. Priority mode favours popular competitions; it does not predict which will contain arbitrage. Credit costs vary by API request.
Draw protection is conservative: if a draw-capable sport returns only two outcomes, CALCEX marks it unsafe and refuses to call it a guaranteed arb.
A green “ARB FOUND” badge means the mathematics works on the fresh prices returned by the API. It still does not guarantee that the bookmaker will accept the stake, keep the price, or settle under identical rules. Verify the exact market in each app before betting.