StartupHub.ai's cross-venue engine has once again identified profitable arbitrage opportunities across leading prediction markets. On August 27, 2026, our system surfaced 7 instances where the same real-world event was priced differently enough on two venues, allowing for a risk-free profit.
An arbitrage lock occurs when buying a 'YES' contract on one market 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 5 of these opportunities are live right now, spreads can close fast, and factors like fees, KYC requirements, and withdrawal limits can impact actual returns. This information is for educational purposes only and is 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.