Prices and order book spreads
Kalshi bid and ask prices produce a venue midpoint and spread. For enriched markets, resting order book levels provide a notional depth measure instead of treating headline liquidity as executable depth.
Kalshi data
Kalshi odds with cross-venue context
Prediction Market News preserves Kalshi venue prices and methodology while comparing curated equivalent markets with Polymarket. Consensus values never replace the underlying venue odds or resolution rules.
Market screener
Sort by volume, OI, liquidity/depth, spread, and holder concentration.
Rankings
Find the highest-volume, deepest, and most concentrated active markets.
LLM context
Use curated public context while the JSON API remains protected from anonymous traffic.
Honest volume and open interest
Kalshi traded USD is calculated from fills only when paginated trade history is complete. Open interest uses contract count multiplied by maximum payout notional and is labeled separately from Polymarket locked USDC.
Consensus and resolution rules
Human-reviewed event matches display both venues' rules, outcome coverage, open-interest-weighted consensus odds, and the spread between venue midpoints.
Live Polymarket data sample
Updated continuouslyWorld Cup Winner
Sports · updated 277h ago
$23.8M 24h · $69.1M OI · 0.8% spread
Presidential Election Winner 2028
Politics · updated 277h ago
$2M 24h · $12.8M OI · 3.6% spread
Fed Decision in July?
Politics · updated 277h ago
$2.88M 24h · $13.5M OI · 0.5% spread
Democratic Presidential Nominee 2028
Politics · updated 277h ago
$2.51M 24h · $4.76M OI · 3.3% spread
NBA: LeBron James Next Team
Sports · updated 277h ago
$3.03M 24h · $9.56M OI · 1.9% spread
Republican Presidential Nominee 2028
Politics · updated 277h ago
$1.12M 24h · $4.62M OI · 2.7% spread
Frequently asked questions
Does consensus replace Kalshi odds?
No. Kalshi and Polymarket prices remain visible independently; consensus is an additional derived metric for reviewed matches.
How is Kalshi volume calculated?
USD volume is summed from individual fills. Combined volume is withheld when the configured trade-history pagination is incomplete.
Are all markets automatically matched?
No. Cross-venue matches and resolution differences are reviewed and stored in a versioned repository configuration.