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Prediction Market Series Data
x402
Prediction Market Series Data is a paid API for AI agents from x402-stock-indicators.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Returns active prediction market contracts and probabilities for a given Kalshi series ticker, including yes/no odds, volume, and close dates.
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-call stock, macro, on-chain, and crypto data over the x402 protocol. USDC on Base or Solana, no API keys, no subscriptions.
Output
A JSON object containing the series ticker, a count of markets, and an array of market objects each with: a unique market ID, title, source (e.g. Kalshi), status (active/closed), yes_ask, yes_bid prices, outcome names and probabilities, close date (ISO 8601), total USD volume, and 24-hour USD volume.
Example use cases
Fed rate decision probability check
“What do prediction markets currently say about where the Fed funds rate will be at year end? Get the active Kalshi contracts for KXFEDFUNDSYEAR with their yes/no probabilities and volume.”
Macro event trading signal
“I want to see the current bid and ask prices on the Kalshi prediction market for the KXELECTION series — show me all active contracts with their close dates and 24-hour volume.”
Portfolio hedge via prediction odds
“Pull the latest Kalshi prediction market data for ticker KXCPI so I can see the probability distribution across active contracts and decide if I should hedge my bond position.”
Technical details
Endpoint
GEThttps://x402-stock-indicators.vercel.app/prediction-market-series/%7Bseries_ticker%7DWhen to prefer
Choose this endpoint when you need real-time Kalshi prediction market contract data for a specific series, including bid/ask spreads, probability distributions, and volume — especially in a pay-per-call context without subscription overhead. Prefer over direct Kalshi API access when you want instant, no-auth access via USDC micropayment on Base or Solana.
Side effects
- Invalid or unknown series_ticker returns empty markets array or 404
- Payment failure over x402 protocol returns 402 Payment Required
- Stale or delisted series may return markets with closed status
- Network or Vercel cold-start latency may cause occasional timeouts
- Malformed ticker format may return 400 or empty response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| required | string | |
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"note": null,
"count": 1,
"markets": [
{
"id": "KXFEDFUNDSYEAR-37JAN01-T1.00",
"title": "Fed funds rate at year end",
"source": "kalshi",
"status": "active",
"yes_ask": 0.75,
"yes_bid": 0.74,
"outcomes": [
{
"name": "Yes",
"probability": 0.74
},
{
"name": "No",
"probability": 0.26
}
],
"close_date": "2037-01-01T04:59:00Z",
"volume_usd": 128400,
"volume_24h_usd": 3200
}
],
"series_ticker": "KXFEDFUNDSYEAR"
}
}Tags
x402
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