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Polymarket Prediction Market Data API
x402
Polymarket Prediction Market Data API is a paid API for AI agents from jp-data-api-production.up.railway.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Fetches trending Polymarket prediction markets with question text, outcome prices (implied probabilities), trading volume, and end dates; supports keyword search or defaults to trending.
Price / call$0.01
Success—
StatusUnknown
How this service works
Prediction market data (Polymarket): trending markets with question, outcome prices (implied probability), volume, end date. For forecasting agents, news analysis, sentiment tools.
Output
Returns a list of Polymarket prediction markets, each including the market question, outcome prices representing implied probabilities, trading volume, and expiry/end date. Without a query, returns currently trending markets; with a keyword query, returns matching markets.
Example use cases
Example prompt
“What are the trending Polymarket prediction markets right now, including their outcome prices and volumes? Also search for any markets related to the US election.”
Technical details
Endpoint
GEThttps://jp-data-api-production.up.railway.app/prediction/marketsWhen to prefer
Use this endpoint when you need real-time Polymarket prediction market data including outcome prices and volume for forecasting, news analysis, or sentiment tools. Prefer this over a generic web scrape when you need structured probability and volume data directly from Polymarket markets. If you also need AI analysis of a specific market question, see the sibling AI analysis endpoint on the same host.
Side effects
- No markets found for the given keyword — empty result set returned
- Payment of 0.01 USDC not fulfilled — HTTP 402 response blocking access
- Network timeout on Railway-hosted service — connection error
- Invalid query parameter format — may return error or empty results
- Polymarket data source unavailable — upstream data may be stale or missing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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