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Prediction Market Price History
x402
Prediction Market Price History is a paid API for AI agents from clink-lithium-vault.fly.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-10).
Returns implied-probability time series with OHLC-style stats for a given Polymarket or Kalshi prediction market over 1d, 1w, 1m, or max intervals
Price / call$0.02
Success—
StatusUnknown
How this service works
Prediction market price history - one market's implied-probability series over 1d, 1w, 1m or max, with first/last/high/low/change, for a Polymarket market (condition id, slug or numeric id) or a Kalshi market (ticker). Ids come from /pm/search. Backtesting, charting, trend confirmation. ?id=<market id>&interval=1d|1w|1m|max.
Output
Returns a JSON object with a 'stats' block (first, last, high, low, change, point count), a 'market' block (platform, question), and a 'points' array of timestamped implied-probability values (p, t) covering the requested interval.
Example use cases
Backtest a trading strategy on market sentiment
“I want to backtest a strategy on the Polymarket 'Will the Fed cut rates in Q3?' market — can you pull the max history of implied probabilities for that market so I can see how it trended over time?”
Chart weekly probability for Kalshi market
“Show me the implied probability chart data for the Kalshi market KXBTC-JAN for the past 1 week — I need the time series points plus the high, low, and change stats.”
Confirm trend before placing a prediction market trade
“Before I buy YES shares on this Polymarket market (slug: fed-cut-2025), can you get the 1-month probability history so I can see if the trend is moving up or down?”
Technical details
Endpoint
GEThttps://clink-lithium-vault.fly.dev/pm/history?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need historical implied-probability time series data — including OHLC-style stats — for a specific Polymarket or Kalshi market. Prefer this over general financial data APIs when the asset is a prediction market contract rather than a stock or crypto asset. Ideal for backtesting, trend confirmation, and charting workflows where you already have a market id or slug from /pm/search.
Side effects
- Invalid or unknown market id returns an error or empty response
- Interval enum value not one of 1d|1w|1m|max causes a validation error
- Kalshi ticker or Polymarket slug not found returns no data
- Missing required 'id' query param returns a 400-style error
- Market with very few trades may return sparse or single-point series
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"stats": {
"low": 0.04,
"high": 0.09,
"last": 0.05,
"first": 0.08,
"change": -0.03,
"points": 57
},
"market": {
"platform": "polymarket",
"question": "..."
},
"points": [
{
"p": 0.08,
"t": "2026-09-09T00:00:00.000Z"
}
]
}
}Tags
x402
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