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Polymarket Top 25 Prediction Markets Feed
x402
Polymarket Top 25 Prediction Markets Feed is a paid API for AI agents from x402.ottoai.services, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Returns the 25 highest-volume open Polymarket prediction markets with live odds, bid/ask, volume, liquidity, and price change data, refreshed every 5 minutes.
Price / call$0.001
Success—
StatusUnknown
How this service works
Top Polymarket prediction markets RIGHT NOW: the 25 highest-volume open markets with live odds (outcome probabilities), best bid/ask, spread, last trade price, 24h + total volume, liquidity, 1d/7d price change, end date and event link. Flat JSON, refreshed every 5 minutes. Prediction market odds, Polymarket data, event probabilities, market sentiment. $0.001 per call.
Output
A flat JSON object with status, meta (including generatedAt timestamp), and data array containing up to 25 market entries — each with market name, outcome probabilities, best bid, best ask, spread, last trade price, 24h and total volume, liquidity, 1-day and 7-day price change, end date, and a direct link to the event on Polymarket. Data is cached and refreshed every 5 minutes.
Example use cases
Example prompt
“Pull up the top Polymarket prediction markets right now — I want to see the 25 highest-volume open markets with their current odds, bid/ask spreads, and how prices have moved over the past day and week.”
Technical details
Endpoint
GEThttps://x402.ottoai.services/pm-marketsWhen to prefer
Use this endpoint when you need a broad, curated snapshot of the most active Polymarket prediction markets across all topics (politics, sports, crypto, etc.) with full market microstructure data. Prefer the sibling crypto-specific Polymarket endpoint if you only care about BTC/ETH/crypto markets. Prefer this endpoint over manually scraping Polymarket when you need structured, machine-readable odds and volume data in a single call.
Side effects
- Payment failure: 402 response if USDC micropayment not included or insufficient
- Stale data: cache may be up to 5 minutes old during refresh cycle
- Empty data: no markets returned if Polymarket API is unreachable
- Service outage: 5xx if underlying data pipeline is down
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"venue": "polymarket",
"markets": [
{
"url": "https://polymarket.com/event/fed-decision-in-july-181",
"slug": "will-the-fed-cut-rates-in-july",
"spread": 0.01,
"bestAsk": 0.89,
"bestBid": 0.88,
"endDate": "2026-07-29T00:00:00Z",
"marketId": "516710",
"outcomes": [
{
"outcome": "Yes",
"probability": 0.885
},
{
"outcome": "No",
"probability": 0.115
}
],
"question": "Will the Fed cut rates in July?",
"eventTitle": "Fed Decision in July?",
"conditionId": "0x86f5b0f1934bb39421651ad2ba0f04494700ba9e95663a5c141a8674c4978c15",
"liquidityUsd": 3395614.54,
"volume24hUsd": 4821055.2,
"lastTradePrice": 0.885,
"volumeTotalUsd": 48348772.09,
"oneDayPriceChange": 0.015,
"oneWeekPriceChange": 0.0725
}
],
"generatedAt": "2026-07-10T12:00:00.000Z",
"marketCount": 25,
"totalVolume24hUsd": 92401882.4
},
"meta": {
"degraded": false,
"validUntil": "",
"generatedAt": "",
"stalenessSec": 0
},
"status": "success"
}
}Tags
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