Where Kalshi and Polymarket prices disagree with the vig-free consensus of the sportsbooks, for the same games, right now. Book consensus comes from the same feed that aggregates 30+ sportsbooks; exchange prices are read from the same store that serves /v1/prediction-markets. A divergence describes where two markets currently disagree; it is not a prediction, a pick, or betting advice.
Updated 2026-08-31T21:01:07Z · refreshes every 15 minutes · all times UTC
| # | Event | Sport | Market | Books consensus | Market price | Gap | Kickoff (UTC) |
|---|---|---|---|---|---|---|---|
| 1 | Baltimore Orioles at Colorado Rockiesmarkets lean Colorado Rockies | MLB | Kalshi | 55.1%Baltimore Orioles across 23 books | 52.0%Baltimore Orioles | 3.1 pts | Sep 01, 00:40 UTC |
| 2 | San Diego Padres at Cincinnati Redsmarkets lean Cincinnati Reds | MLB | Kalshi | 59.3%San Diego Padres across 23 books | 57.0%San Diego Padres | 2.3 pts | Aug 31, 22:40 UTC |
| 3 | Miami Marlins at Washington Nationalsmarkets lean Miami Marlins | MLB | Kalshi | 51.3%Washington Nationals across 23 books | 49.0%Washington Nationals | 2.3 pts | Aug 31, 22:45 UTC |
| 4 | New York Yankees at Los Angeles Angelsmarkets lean Los Angeles Angels | MLB | Kalshi | 55.0%New York Yankees across 22 books | 53.0%New York Yankees | 2.0 pts | Sep 01, 01:38 UTC |
| 5 | San Francisco Giants at Atlanta Bravesmarkets lean Atlanta Braves | MLB | Kalshi | 64.0%Atlanta Braves across 23 books | 66.0%Atlanta Braves | 2.0 pts | Aug 31, 22:05 UTC |
| 6 | New York Mets at Tampa Bay Raysmarkets lean Tampa Bay Rays | MLB | Kalshi | 37.4%New York Mets across 23 books | 36.0%New York Mets | 1.4 pts | Aug 31, 22:40 UTC |
| 7 | Detroit Tigers at Minnesota Twinsmarkets lean Minnesota Twins | MLB | Kalshi | 47.4%Detroit Tigers across 23 books | 46.0%Detroit Tigers | 1.4 pts | Aug 31, 23:40 UTC |
| 8 | Milwaukee Brewers at Chicago Cubsmarkets lean Milwaukee Brewers | MLB | Kalshi | 51.3%Chicago Cubs across 23 books | 50.0%Chicago Cubs | 1.3 pts | Aug 31, 23:40 UTC |
| 9 | Chicago White Sox at Houston Astrosmarkets lean Houston Astros | MLB | Kalshi | 45.1%Chicago White Sox across 23 books | 44.0%Chicago White Sox | 1.1 pts | Sep 01, 00:10 UTC |
How this is measured: for every pre-game matchup in 6 major sports we take each sportsbook's latest full-game moneyline snapshot from the last 2 hours, remove the vig by proportional normalization, and take the median implied probability across books, from the same feed that aggregates 30+ sportsbooks; a matchup needs at least 3 books to qualify. We then match the same event on Kalshi and Polymarket by team names and event date within the same sport, and compare the prediction market's latest price for the same outcome (within the last hour), read as an implied win probability. The reported gap is the difference in probability points on the side where the two disagree most; gaps under 1 point are dropped as noise, and games already in play are excluded. Honest caveat: prediction-market prices are not vig-free quotes; they include the exchange's own fees and the bid/ask spread, and a thin order book can sit far from where it would trade at size, so part of any gap is cost structure and liquidity rather than disagreement about the game. All timestamps are UTC. A divergence describes where two markets currently disagree; it is not a prediction, a pick, or betting advice.
GET /v1/prediction-markets/{sport_key}?sources=kalshi,polymarket
serves the exchange prices and GET /v1/sports/{sport_key}/odds
the per-book lines behind the consensus. The free tier includes
1,000 credits per month, no card required; paid tiers are listed at
/pricing.
curl -s 'https://parlay-api.com/v1/prediction-markets/americanfootball_nfl?sources=kalshi,polymarket' \
-H "X-API-Key: $PARLAY_API_KEY"Biggest line moves (free feed) · Kalshi odds API · Polymarket odds API · Kalshi prices API answer · No-vig calculator · All betting calculators