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Financial Data x402 – Prediction Market Series
x402
Financial Data x402 – Prediction Market Series is a paid API for AI agents from x402financialdata.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-10).
Returns all active prediction market contracts within a named series (e.g. Fed funds rate, election outcomes), including prices, probabilities, volume, and close dates, paid per-call via USDC over x402.
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, total market count, and an array of market objects. Each market includes a unique ID, title, source (e.g. Kalshi), status (active/closed), yes ask/bid prices, outcome probabilities for Yes and No, close date, total USD volume, and 24-hour USD volume.
Example use cases
Fed rate outlook probability check
“What probability are prediction markets currently assigning to the Fed funds rate staying above 1% through the end of 2037? Pull the full KXFEDFUNDSYEAR series so I can see all the contracts.”
Macro research dashboard feed
“I'm building a macro dashboard — can you fetch the latest prediction market data for the KXFEDFUNDSYEAR series so I can show live probabilities and 24-hour volume for each contract?”
Algorithmic trading signal generation
“Get me the current yes_ask, yes_bid, and outcome probabilities for every market in the KXFEDFUNDSYEAR prediction series — I want to compare them against my model's forecasts.”
Technical details
Endpoint
GEThttps://x402financialdata.com/prediction-market-series/%7Bseries_ticker%7DWhen to prefer
Choose this endpoint when you need structured prediction market data for a named series (e.g. macroeconomic rate forecasts) without API key setup or subscriptions. Ideal for agents that can pay micro-amounts in USDC via x402 and need real-time market probabilities, bid/ask spreads, and volume data from Kalshi. Prefer over traditional financial data APIs when you want pay-per-call pricing with no commitment.
Side effects
- Invalid or unknown series_ticker returns empty markets array or 404
- Payment failure (insufficient USDC balance) results in 402 response and no data returned
- Series with no active markets returns count:0 and empty markets array
- Stale data if underlying Kalshi feed is delayed
- Rate-limiting or node issues on Base/Solana may cause payment processing delays
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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