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Prediction Market Search & Filter API
x402
Prediction Market Search & Filter API is a paid API for AI agents from api.predictionmarketdata.io, paid per call via x402, $0.001/call, not verified (last probed 2026-10-27); live alternatives: agentsvc.io Prediction Markets Search ($0.009) and Seerium Ending-Soon Prediction Markets API ($0.001).
Agents call it through Zero, which pays per call: no API key and no wallet of your own. New accounts start with $5. Live alternatives for the same use case: agentsvc.io Prediction Markets Search ($0.009) · Seerium Ending-Soon Prediction Markets API ($0.001).
Search, filter, sort, and paginate prediction markets across exchanges like Kalshi, Polymarket, and Gemini.
Price / call$0.001
Success—
StatusUnknown
How this service works
Search, filter, and sort prediction markets across exchanges.
Output
A paginated list of prediction market records matching the query, including event tickers, market names, exchange codes, status, open interest in USD, volume metrics (1hr, 24hr, total), trade counts, and outcome types.
Example use cases
Example prompt
“Search prediction market data for open binary markets related to 'US recession' on Kalshi, sorted by 24-hour volume descending, and return the top 10 results.”
Technical details
Endpoint
GEThttps://api.predictionmarketdata.io/prediction-markets?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to discover, search, or filter prediction markets across multiple exchanges with flexible criteria like volume thresholds, outcome type, category, or free-text search. Prefer this over exchange-specific APIs when you want cross-exchange visibility. Use sibling endpoints for narrative recaps, similar market discovery, or time-series volume data.
Side effects
- Invalid entity_code returns empty results or 400 error
- Unrecognized pmcs_category code returns no results — use /prediction-markets/taxonomy to get valid codes
- Overly restrictive volume_min/volume_max combo returns empty result set
- Invalid sort_by key may return 400 or default sort fallback
- Payment not included or insufficient USDC results in 402 payment required error
- event_ticker not found returns empty results
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"limit": "10",
"offset": "0",
"search": "artificial intelligence",
"status": "open",
"sort_by": "total_volume_24hr",
"sort_dir": "desc",
"outcome_type": "Binary"
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"pagination": {
"limit": 10,
"total": 0,
"offset": 0,
"hasMore": false
},
"predictionMarkets": []
}Schema · Response
{
"type": "json",
"example": {
"pagination": {
"limit": 2,
"total": 30834,
"offset": 0,
"hasMore": true,
"nextOffset": 2
},
"predictionMarkets": [
{
"end_ts": "2026-06-23T00:30:00Z",
"is_series": true,
"event_name": "Game 3: San Antonio at New York",
"entity_code": "KALSHI",
"event_ticker": "KXNBAGAME-26JUN08SASNYK.KALSHI",
"event_outcomes": [
{
"status": "Open",
"volume": 7872349.97,
"market_id": "KXNBAGAME-26JUN08SASNYK-NYK_yes.KALSHI",
"percentage": 0.54,
"outcome_name": "New York"
}
],
"pmcs_categories": [
"SPT",
"BSKTBL",
"NBA"
],
"event_outcome_type": "Multi",
"entity_event_category": "Sports"
}
]
}
}Tags
x402
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