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HostDeFi Polymarket Prediction History
x402
HostDeFi Polymarket Prediction History is a paid API for AI agents from rpc.hostdefi.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-01).
Returns historical probability time-series data for a given Polymarket prediction market identified by its conditionId
Price / call$0.02
Success—
StatusUnknown
How this service works
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Output
Returns a JSON object with ok status, a count of data points, the market title, an array of [timestamp, yes-probability, no-probability] tuples, the source (polymarket), and the market ID. Example: {ok:true, count:120, title:'Will it settle?', points:[[0,0.62,0.39]], source:'polymarket', marketId:'...'}
Example use cases
Charting prediction market odds over time
“Show me the full probability history for this Polymarket market — the condition ID is 0x3a4b5c6d7e8f — I want to see how the odds shifted from start to now.”
Research prior to placing a prediction bet
“Before I trade on Polymarket, can you pull the historical probability points for market ID 0xdeadbeef1234 so I can see whether the market has been volatile or stable?”
Monitoring a market for resolution signals
“Has the probability on Polymarket market 0x9f8e7d6c5b4a been trending toward YES or NO lately? Grab its full history and summarize the recent trend.”
Technical details
Endpoint
GEThttps://rpc.hostdefi.com/api/v1/x402/predict/history?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need historical probability time-series data for a specific Polymarket prediction market and have the conditionId on hand. It is useful for charting odds evolution, backtesting, and pre-trade research. Prefer it over manual Polymarket API scraping when you need a simple paid API call with structured output.
Side effects
- Invalid or unknown marketId returns empty result or error
- Missing required marketId query parameter may return a 400 or empty response
- Network or RPC node downtime causes endpoint unavailability
- Polymarket market not indexed yet returns no data
- Payment failure (x402) if USDC not provided correctly blocks the request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"count": 120,
"title": "Will it settle?",
"points": [
[
0,
0.62,
0.39
]
],
"source": "polymarket",
"marketId": "…"
}
}Tags
x402
Reviews
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