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Polymarket Market Price History
x402
Polymarket Market Price History is a paid API for AI agents from aiworker.duckdns.org, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).
Returns daily close prices, VWAP, volume, and summary statistics for a Polymarket prediction market over a configurable date window.
Price / call$0.02
Success—
StatusUnknown
How this service works
Deterministic-first data for agents, paid per call in USDC over x402 v2: DeFi yields, Base token and wallet cards, Polymarket odds and backtests, news, fact checks, cited briefs. 20 routes, $0.005-$1
Output
Returns a JSON object containing: market metadata (slug, question, condition ID, resolution status, end date), a daily time-series array (date, close price, VWAP, trade count, USD volume, data source), a window object (from/to dates, number of days), and a summary object (open, high, low, last price, 1-day change, 1-week change, total USD volume, days to end, number of days with data).
Example use cases
Track prediction market price trend
“Show me the daily closing prices for the Polymarket market 'will-the-fed-cut-rates-in-2025' over the last 60 days, including the volume and how much the price has changed this week.”
Research resolved market outcome
“Get me the full price history for Polymarket condition ID 0xa467b14d51f01b957109d9cbb1d6c124fab2a089d52ed8f471d23c2812e743b7 over the past 90 days so I can see how the market moved before resolution.”
Monitor live market momentum
“What are the current price, high, low, and 1-day change for the Polymarket market with slug 'trump-wins-2024-election'? Pull the last 7 days of data.”
Technical details
Endpoint
GEThttps://aiworker.duckdns.org/v1/polymarket/historyWhen to prefer
Choose this endpoint when you need structured daily price history, VWAP, and volume statistics for a specific Polymarket prediction market — especially when you need a clean summary (open/high/low/last, 1d/1w change) without scraping Polymarket directly. Ideal for agents doing trend analysis, backtesting, or monitoring a market's probability movement over time. Prefer over raw Polymarket API access when you want normalized, ready-to-use data at low per-call cost.
Side effects
- Invalid or unrecognized market slug/condition ID returns an error
- Market with no stored close data returns empty series array
- Days parameter out of range (1-365) rejected with validation error
- Payment of $0.02 USDC required; missing x402 payment header returns 402
- Market exists but has no trading history within the requested window
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"market": {
"id": "559651",
"slug": "xi-jinping-out-before-2027",
"end_date": "2027-01-01",
"question": "Xi Jinping out before 2027?",
"event_slug": "xi-jinping-out-before-2027",
"resolution": "open",
"resolved_at": null,
"condition_id": "0xa467b14d51f01b957109d9cbb1d6c124fab2a089d52ed8f471d23c2812e743b7"
},
"series": [
{
"day": "2026-08-11",
"vwap": 0.0398,
"close": 0.04,
"source": "clob",
"trades": 41,
"volume_usd": 1520.5
}
],
"window": {
"to": "2026-09-09",
"days": 30,
"from": "2026-08-11"
},
"summary": {
"low": 0.037,
"high": 0.045,
"last": 0.0385,
"open": 0.04,
"n_days": 30,
"change_1d": -0.001,
"change_1w": -0.003,
"days_to_end": 479,
"volume_usd_total": 48210.2
},
"disclaimer": "…",
"generation": 1,
"attribution": "…",
"data_cutoff": "2026-09-09",
"generated_at": "2026-09-10T12:00:00.000Z"
}
}Tags
x402
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