Returns title-matched Kalshi vs Polymarket prices on the same political question...
https://workspace-x402-paywall.onrender.com/predict/spreadOverview
Returns title-matched Kalshi vs Polymarket prices on the same political questions with the cross-venue price gap in percentage points and basis points - prediction-market arbitrage screening
Protocol
x402
Price
$0.0050
Payment Asset
USD Coin
Payment Network
eip155:8453
Category
uncategorized
Provider
Spread Paywall API
Source
bazaar
Indexed
2026-11-10 17:07:30
Health
Status
unknown
Latency (p50)
—
Uptime (30d)
—
Reliability Score
—
Last Checked
Never
Last Healthy
Never
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
—
Asset Verified
—
Facilitator
—
Input Schema
{
"method": "GET",
"queryParams": {},
"type": "http"
}
Output Schema
{
"example": {
"matched_pairs": [
{
"gap_bps": 300,
"gap_points": 3,
"kalshi_market": "2028 Presidential Election Winner - Democratic Party",
"kalshi_yes": 0.49,
"polymarket_event": "2028 Presidential Election",
"polymarket_market": "Will the Democratic Party win the 2028 presidential election?",
"polymarket_yes": 0.52,
"subject": "Democratic Party"
}
],
"note": "Cross-venue pairs require the same question type AND the same outcome subject on both venues - nominee markets never pair with party-winner markets."
}
}