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Prediction Market Price History
x402
Prediction Market Price History is a paid API for AI agents from clinkagent.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-02).
Returns implied-probability price history (OHLC + change) for a 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
A time-series of implied probability values for the requested market over the chosen interval, along with summary statistics: first price, last price, high, low, and net change — suitable for charting, trend analysis, or backtesting.
Example use cases
Trend confirmation before trading
“Get me the 1-month price history for the Polymarket market with condition id 0xabc123 — I want to see if the implied probability has been trending up or down before I take a position.”
Backtesting a market prediction strategy
“Fetch the max history for the Kalshi market with ticker FOMC-25JAN-T5.00 so I can backtest how the market moved around past Fed decisions.”
Charting a market for a dashboard
“I need the 1-day implied-probability series for Polymarket slug 'us-recession-2025' — give me the open, high, low, close, and net change so I can plot it on my dashboard.”
Technical details
Endpoint
GEThttps://clinkagent.com/pm/history?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need historical implied-probability data (OHLC + change) for a specific Polymarket or Kalshi market for charting, trend analysis, or backtesting. It is purpose-built for prediction market history and supports both Polymarket (condition id, slug, numeric id) and Kalshi (ticker) identifiers. Use /pm/search first to discover market ids if you don't have them.
Side effects
- Invalid or unknown market id returns an error (market not found)
- Unsupported interval value (must be 1d, 1w, 1m, or max)
- Market id not provided returns a 400 bad request
- Market with no historical data may return an empty series
- Payment not completed (x402) results in a 402 Payment Required response
- Rate limiting or quota exhaustion returns a 429 error
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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