StartupHub.ai's cross-venue engine has surfaced six live prediction market arbitrage opportunities as of August 23, 2026. These opportunities involve the same real-world event being priced on different prediction market venues such as Polymarket, Kalshi/Robinhood, and PredictIt.
An arbitrage lock occurs when buying a 'YES' contract on one venue and a 'NO' contract on another for the same event totals less than $1, guaranteeing a profit regardless of the outcome. Spreads can close rapidly, and potential returns may be affected by fees, KYC requirements, and withdrawal limits. This information is for informational 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.