Prediction Market Arbitrage: 13 Live Opportunities on August 7, 2026

StartupHub.ai's proprietary cross-venue engine has surfaced 16 prediction market arbitrage opportunities as of August 7, 2026. These opportunities arise when the 'YES' price on one venue and the 'NO' price on another for the same real-world event sum to less than $1, allowing for a guaranteed profit regardless of the outcome.

Thirteen of these spreads are live right now, offering immediate potential for traders. The remaining three were observed within the last few hours and may have already closed due to rapid market movements. It is crucial to remember that spreads can close quickly, and fees, KYC requirements, and withdrawal limits can impact actual returns.

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=1

Read the arbitrage API reference or open the live JSON endpoint.

Focused guides: Polymarket arbitrage, Kalshi arbitrage, and the arbitrage bot API.

Informational feed, not financial advice. Live arbitrages are often fleeting, and fees, gas, KYC and withdrawal limits eat into the spread. Verify each market’s resolution rules and costs before trading.