StartupHub.ai's proprietary cross-venue engine has just surfaced 10 prediction market arbitrage opportunities as of July 30, 2026. These opportunities arise when the same real-world event is priced differently across venues like Polymarket, Kalshi/Robinhood, and PredictIt, allowing for a risk-free profit.
An arbitrage lock occurs when buying a 'YES' contract on one venue and a 'NO' contract on another for the same event costs less than $1 combined, guaranteeing a payout of $1 regardless of the outcome. While 9 of these spreads are live now, prediction market prices move quickly, and opportunities can close without warning. It's also important to consider potential fees, KYC requirements, and withdrawal limits, which can impact actual returns. This information is for informational purposes only and not financial advice.
Track these live, or poll the free API
The board above refreshes on its own, so this page stays current long after today. The full cross-venue feed lives on the arbitrage board, and every match is also a free JSON API and an MCP tool, so a trading agent can poll live Polymarket, Kalshi and PredictIt arbitrage opportunities and act on them.
curl https://www.startuphub.ai/api/v1/arbitrage?arbs_only=1Read the arbitrage API reference or open the live JSON endpoint.
Focused guides: Polymarket arbitrage, Kalshi arbitrage, and the arbitrage bot API.