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Prediction Markets Search (Polymarket + Kalshi + Manifold)
x402
Prediction Markets Search (Polymarket + Kalshi + Manifold) is a paid API for AI agents from bess-x402.onrender.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-28).
Searches Polymarket, Kalshi, and Manifold simultaneously for open markets matching a query, returning current probabilities and odds from each platform side by side.
Price / call$0.005
Success—
StatusUnknown
How this service works
One query across Polymarket, Kalshi and Manifold at once: matching open events and markets with current probabilities from each, so real-money and crowd odds can be compared side by side. Use to answer 'what are the odds that...' with every major prediction market.
Output
A list of open markets from Polymarket, Kalshi, and Manifold matching the query, each with the market title, current outcome probabilities, and platform source — allowing direct side-by-side comparison of real-money and crowd-sourced odds on the same event.
Example use cases
Election outcome probability comparison
“What are the odds that the Democrats win the 2026 midterms? Check Polymarket, Kalshi, and Manifold all at once and show me how the real-money and crowd forecasts compare.”
AI regulation market search
“Are there any prediction markets about AI regulation passing in the US this year? Search across all major platforms and show me the current probabilities.”
Crypto event odds lookup
“What do prediction markets think the chances are that Bitcoin hits $150k in 2025? Pull results from Polymarket, Kalshi, and Manifold and compare the odds side by side, up to 10 results per market.”
Technical details
Endpoint
GEThttps://bess-x402.onrender.com/v1/predictions/search?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to compare prediction market probabilities across multiple platforms in a single call rather than querying each individually. It is ideal for answering 'what are the odds of X' questions with both real-money (Polymarket, Kalshi) and play-money crowd forecasts (Manifold) simultaneously. Prefer this over the single-platform Polymarket endpoint when cross-platform comparison or breadth of coverage matters more than deep order book data for one specific market.
Side effects
- No matching markets found on any platform for the query
- One or more upstream platforms (Polymarket, Kalshi, Manifold) is temporarily unavailable, returning partial results
- Query too vague to return relevant markets
- limit parameter out of range (must be 1-15) returns validation error
- Rate limiting or payment failure due to insufficient USDC balance
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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