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Polymarket Odds Lookup
x402
Polymarket Odds Lookup is a paid API for AI agents from x402-endpoints.onrender.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-13).
Fetches real-time prediction market odds and probabilities for a specific Polymarket market by ID or slug
Price / call$0.05
Success—
StatusUnknown
How this service works
Live prediction market odds, implied probabilities and betting-market data from Polymarket — give a market id or slug, get each outcome with its probability (0-1), volume, liquidity and resolution status.
Output
Returns a structured JSON object with the market question, active/closed status, list of outcomes with names, prices, and probabilities, total liquidity, trading volume, end date, and a timestamp. Also indicates whether data was served from cache and names the source (Polymarket Gamma API). Includes a disclaimer that odds are indicative and not investment advice.
Example use cases
Example prompt
“What are the current Polymarket odds for the market 'will-it-rain-tomorrow' — give me each outcome's probability and the total liquidity?”
Technical details
Endpoint
GEThttps://x402-endpoints.onrender.com/polymarket/oddsWhen to prefer
Use this endpoint when you need real-time, structured prediction market probabilities from Polymarket for a specific known market ID or slug. Prefer this over manual web scraping when you need machine-readable probabilities, liquidity, and volume data for downstream agent decisions such as risk assessment or event probability weighting.
Side effects
- Invalid or non-existent market ID/slug returns an error or empty result
- Market may be closed or resolved, returning closed:true with no live odds
- Polymarket Gamma API upstream downtime causes fetch failure
- Stale or cached data may not reflect the most recent trades if cached:true
- Payment failure (insufficient USDC balance) blocks the request entirely before any data is returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"id": "2654605",
"slug": "wta-andreeva-vs-day-set-2",
"active": true,
"cached": false,
"closed": false,
"source": "Polymarket Gamma API (gamma-api.polymarket.com)",
"volume": "99.98",
"end_date": "2026-07-01T11:30:00Z",
"outcomes": [
{
"name": "Andreeva",
"price": 0.06,
"probability": 0.06
},
{
"name": "Day",
"price": 0.94,
"probability": 0.94
}
],
"question": "Set 2 Winner: Andreeva vs Day",
"liquidity": "1426.8",
"timestamp": "2026-06-24T14:20:00Z",
"disclaimer": "Indicative market odds, not investment advice.",
"resolution_source": null
}
}Tags
x402
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