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Quotient Prediction Market Semantic Search
x402
Quotient Prediction Market Semantic Search is a paid API for AI agents from quotient-api-gateway.onrender.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).
Search prediction markets by semantic meaning across Polymarket, Kalshi, and Limitless, returning ranked markets with live odds, tags, categories, and relevance scores
Price / call$0.01
Success—
StatusUnknown
How this service works
Use this to search market titles plus the latest Q summary for a shortlist of recent, open contracts. Returns 10 results by default, at most 20. Use direct topic keywords. Useful alternate angles may use focused searches within a 10-second discovery budget. On a timeout, return candidates already found instead of retrying. Use explicit as_of only for historical questions. Search does not expand graph relationships or run embedding search.
Output
A ranked list of prediction markets matching the semantic query, each including the market name, parent event, venue (Polymarket/Kalshi/Limitless), live odds, tags, categories, and a relevance score. Results can optionally be grouped by parent event for easier comparison of related markets.
Example use cases
Election outcome market discovery
“Search for prediction markets about the 2024 US presidential election and congressional races on Polymarket — group them by event so I can compare odds across related markets.”
Geopolitical risk trading research
“Find me the most relevant prediction markets about Middle East conflict escalation and oil supply disruptions across Polymarket and Kalshi, ranked by relevance.”
Macro theme market scouting
“I want to trade around the Fed's next decision — can you find prediction markets about interest rate cuts or hikes on Kalshi, grouped by event?”
Technical details
Endpoint
GEThttps://quotient-api-gateway.onrender.com/api/v1/markets/search?utm_source=zero.xyzWhen to prefer
Use this endpoint when you know the topic or theme you want to trade but don't know the exact market name or slug. It excels at semantic discovery across multiple venues simultaneously, making it superior to keyword search when the topic is broad (e.g. 'rate cuts') or when you want to compare related markets grouped by event. Prefer this over direct market browsing endpoints when the user's intent is exploratory research rather than fetching a specific known market.
Side effects
- No markets found for highly niche or misspelled queries — returns empty results
- Invalid venue enum value returns a validation error
- Query string too vague may return loosely related markets with low relevance scores
- Rate limit or payment failure returns 402 or 429 error
- Service on Render free tier may have cold-start latency on first request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| outputrequired | object |
Tags
x402
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