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2s.io Prediction Market Cross-Venue Search
x402
2s.io Prediction Market Cross-Venue Search is a paid API for AI agents from 2s.io, paid per call via x402, $0.012/call, status unknown (last checked 2026-09-15).
Searches prediction market questions across Polymarket, Kalshi, and Limitless Exchange simultaneously, returning live prices, volume, and URLs for each matching market.
Price / call$0.012
Success—
StatusUnknown
How this service works
Cross-venue prediction-market keyword search across Polymarket, Kalshi, and Limitless Exchange in one call. Pass q (required); filter by status (open/closed) and cap per-venue with limit. Each hit is tagged with its venue and returns the question, live YES/NO price (0-1 implied probability), USD volume, close date, and the venue URL — for finding the same real-world question wherever it trades. Read-only, keyless.
Output
A list of market hits, each tagged with venue (Polymarket, Kalshi, or Limitless), the full market question text, live YES and NO prices as implied probabilities (0–1), USD trading volume, market close date, and the direct URL to that market on its venue.
Example use cases
Example prompt
“Search prediction markets across Polymarket, Kalshi, and Limitless for 'Fed rate cut' — only open markets, up to 10 results per venue — and show me the current YES price and volume for each.”
Technical details
Endpoint
GEThttps://2s.io/api/predict/searchWhen to prefer
Use this endpoint when you need to find prediction markets about a real-world topic across multiple venues in a single call, especially when comparing odds or liquidity across Polymarket, Kalshi, and Limitless simultaneously. Prefer this over venue-specific APIs when you don't know which venue has the best market for a given question, or when you want to aggregate and compare prices in one step. It requires no API key and costs a flat $0.0048 USDC per call.
Side effects
- Missing required 'q' parameter returns a 400 error
- Query shorter than 2 characters or longer than 120 characters is rejected
- No matching markets found returns an empty results array
- One or more venues may be unavailable, returning partial results
- Invalid 'status' enum value (not 'open' or 'closed') returns a 400 error
- Limit value outside 1–50 range is rejected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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