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Lukka Prediction Markets Open Interest API
x402
Lukka Prediction Markets Open Interest API is a paid API for AI agents from api.predictionmarketdata.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Returns time-bucketed open interest (USD) data for prediction market exchanges like Polymarket, aggregated by source and time interval.
Price / call$0.001
Success—
StatusUnknown
How this service works
Time-series of prediction-market open interest by exchange (USD).
Output
A JSON array of time-bucketed open interest records, each containing a timestamp, source exchange name and code, source ID, and total open interest in USD — plus a total record count and data type label.
Example use cases
Example prompt
“Can you pull Polymarket open interest data from Lukka for the past 7 days, bucketed into daily intervals (86400000ms), starting from 2026-05-31T00:00:00Z to 2026-06-07T00:00:00Z?”
Technical details
Endpoint
GEThttps://api.predictionmarketdata.io/open-interestWhen to prefer
Use this endpoint when you need time-series open interest data specifically for prediction market exchanges (e.g. Polymarket), especially when you want to analyze trends, compare platforms, or monitor capital deployed in prediction markets over a defined time range.
Side effects
- Missing required query parameters (from, to, interval) returns a 400 error
- Invalid ISO-8601 timestamp format causes a parse error
- Interval value not in milliseconds or malformed causes unexpected bucketing
- Date range too large may result in timeout or truncated response
- Payment not included or insufficient USDC results in 402 Payment Required
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"to": "2026-06-07T00:00:00Z",
"from": "2026-05-31T00:00:00Z",
"interval": "86400000"
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"data": [
{
"time": "2026-05-31T00:00:00Z",
"sourceId": 4137,
"entityCode": "POLYMARK",
"entityName": "Polymarket",
"openInterestUsd": "304614269.5513886"
},
{
"time": "2026-06-01T00:00:00Z",
"sourceId": 4137,
"entityCode": "POLYMARK",
"entityName": "Polymarket",
"openInterestUsd": "242259986.80077267"
},
{
"time": "2026-06-02T00:00:00Z",
"sourceId": 4137,
"entityCode": "POLYMARK",
"entityName": "Polymarket",
"openInterestUsd": "236993507.46824074"
},
{
"time": "2026-06-03T00:00:00Z",
"sourceId": 4137,
"entityCode": "POLYMARK",
"entityName": "Polymarket",
"openInterestUsd": "252438860.81328094"
},
{
"time": "2026-06-04T00:00:00Z",
"sourceId": 4137,
"entityCode": "POLYMARK",
"entityName": "Polymarket",
"openInterestUsd": "306267505.30597925"
},
{
"time": "2026-06-05T00:00:00Z",
"sourceId": 4137,
"entityCode": "POLYMARK",
"entityName": "Polymarket",
"openInterestUsd": "299945766.3940836"
},
{
"time": "2026-06-06T00:00:00Z",
"sourceId": 4137,
"entityCode": "POLYMARK",
"entityName": "Polymarket",
"openInterestUsd": "297536855.05545914"
},
{
"time": "2026-05-31T00:00:00Z",
"sourceId": 4141,
"entityCode": "KALSHI",
"entityName": "Kalshi",
"openInterestUsd": "676021342.0"
},
{
"time": "2026-06-01T00:00:00Z",
"sourceId": 4141,
"entityCode": "KALSHI",
"entityName": "Kalshi",
"openInterestUsd": "582686226.0"
},
{
"time": "2026-06-02T00:00:00Z",
"sourceId": 4141,
"entityCode": "KALSHI",
"entityName": "Kalshi",
"openInterestUsd": "702450989.0"
},
{
"time": "2026-06-03T00:00:00Z",
"sourceId": 4141,
"entityCode": "KALSHI",
"entityName": "Kalshi",
"openInterestUsd": "659814902.0"
},
{
"time": "2026-06-04T00:00:00Z",
"sourceId": 4141,
"entityCode": "KALSHI",
"entityName": "Kalshi",
"openInterestUsd": "734506826.0"
},
{
"time": "2026-06-05T00:00:00Z",
"sourceId": 4141,
"entityCode": "KALSHI",
"entityName": "Kalshi",
"openInterestUsd": "753727402.0"
},
{
"time": "2026-06-06T00:00:00Z",
"sourceId": 4141,
"entityCode": "KALSHI",
"entityName": "Kalshi",
"openInterestUsd": "720078346.0"
}
],
"count": 14,
"dataType": "prediction-open-interest-summary"
}Schema · Response
{
"type": "json",
"example": {
"data": [
{
"time": "2026-06-07T00:00:00Z",
"sourceId": 4137,
"entityCode": "POLYMARK",
"entityName": "Polymarket",
"openInterestUsd": "297477595.47"
}
],
"count": 48,
"dataType": "prediction-open-interest-summary"
}
}Tags
x402
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