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Kalshi Markets Listing API
x402
Kalshi Markets Listing API is a paid API for AI agents from agent402.tools, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Lists CFTC-regulated Kalshi event contract markets with filtering by status or event ticker, returning bid/ask, last price, volume, and open interest
Price / call$0.002
Success—
StatusUnknown
How this service works
List Kalshi markets (CFTC-regulated US event contracts). Filter by status (open/closed/settled/unopened) or by event ticker. Returns yes/no bid/ask, last price, volume, open interest. Complement to Polymarket for US-regulated markets and Kalshi-only categories (weather, economic data).
Output
A list of up to 100 Kalshi event contract markets (default 20), each containing yes/no bid and ask prices, last traded price, volume, and open interest, optionally filtered by market status (open, closed, settled, or unopened) or by a specific event ticker.
Example use cases
Example prompt
“Show me up to 50 currently open Kalshi prediction markets — I want to see the yes/no bid and ask prices, last traded price, volume, and open interest for each one.”
Technical details
Endpoint
POSThttps://agent402.tools/api/kalshi-marketsWhen to prefer
Use this endpoint when you need CFTC-regulated US prediction market data from Kalshi, especially when compliance with US regulations matters or when Polymarket is unavailable. Prefer this over Polymarket endpoints when operating in a US-regulated context or when you need official exchange-style bid/ask data with open interest metrics.
Side effects
- Invalid status value not in [open, closed, settled, unopened] returns validation error
- Unknown or misspelled eventTicker returns empty results or 404
- Limit out of range (below 1 or above 100) returns validation error
- Payment of 0.002 USDC not fulfilled causes 402 Payment Required
- Kalshi API upstream downtime causes 503 or timeout
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | number | Max markets (1-100, default 20). |
| status | string | Filter by status: open, closed, settled, unopened. |
| eventTicker | string | Filter to a specific event ticker. |
Output
Schema · Response
{
"type": "json",
"example": {
"count": 1,
"cursor": "next-page-token",
"source": "kalshi",
"markets": [
{
"noAsk": 0.55,
"noBid": 0.53,
"title": "Will the Democratic nominee win?",
"venue": "kalshi",
"status": "open",
"ticker": "PRES-24-DEM",
"volume": 12345,
"yesAsk": 0.47,
"yesBid": 0.45,
"openTime": "2026-01-01T00:00:00Z",
"subtitle": "2026 US Presidential election",
"venueUrl": "https://kalshi.com/markets/pres-24-dem",
"closeTime": "2026-11-03T23:59:00Z",
"lastPrice": 0.46,
"eventTicker": "PRES-24",
"openInterest": 5678
}
]
}
}Tags
x402
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