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Prediction Market Odds (Polymarket + Kalshi Aggregator)
x402
Prediction Market Odds (Polymarket + Kalshi Aggregator) is a paid API for AI agents from www.x402financialdata.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-14).
Searches Polymarket and Kalshi simultaneously by keyword, returning live real-money-backed outcome probabilities, trading volume, and close dates for matching prediction markets.
Price / call$0.03
Success—
StatusUnknown
How this service works
Prediction market odds in one call: keyword search across Polymarket AND Kalshi simultaneously -- no other market-data API aggregates both -- returning each match's live, real-money-backed outcome probabilities, volume, and close date. Crowd-sourced forecasts for Fed decisions, elections, and macro events often beat polls and analyst surveys; pairs naturally with this API's own FOMC/economic calendar. Not ticker-specific. $0.025/call.
Output
A list of matching prediction markets from Polymarket and Kalshi, each including the market title, real-money-backed outcome probabilities (e.g. Yes/No percentage), trading volume, and market close date — aggregated from both platforms in a single response.
Example use cases
Fed rate decision probability check
“What are the current market odds of the Fed cutting rates at the next FOMC meeting? Pull from both Polymarket and Kalshi and show me the probabilities and volumes.”
Election outcome crowd forecast
“Look up prediction market odds for the 2024 presidential election across Polymarket and Kalshi — I want to see what the real-money crowd is forecasting right now.”
Recession probability monitoring
“Search prediction markets for 'recession' on both Polymarket and Kalshi and tell me the current probability, volume, and when each market closes.”
Technical details
Endpoint
GEThttps://www.x402financialdata.com/prediction-marketsWhen to prefer
Choose this endpoint when you need real-money crowd-sourced forecasts for macro, political, or economic events and want to compare odds across both Polymarket and Kalshi in a single API call. It is uniquely valuable for events like FOMC decisions, elections, and recession probabilities where crowd forecasts often outperform analyst surveys. Not suitable for looking up stock prices, crypto spot prices, or earnings data.
Side effects
- No markets found for the given keyword — try a broader or different search term
- Upstream API unavailability from Polymarket or Kalshi may result in partial or empty results
- Keyword too vague may return irrelevant markets
- Rate limit or payment failure returns 402 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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