Get 5m/15m/1h crypto up-or-down prediction markets for a window
Returns the crypto up/down markets (BTC/ETH/SOL/XRP on Kalshi + Polymarket, plus DOGE/HYPE/BNB and predict.fun on some intervals) for one time window. window_offset shifts by whole windows of the chosen interval (0=current, -1=previous, +1=next, etc.). Responses are cached so UI "previous/next window" navigation doesn't repeatedly re-fetch from upstream. Confirmed past windows are cached longer; historical Polymarket payloads with unresolved or unavailable results expire within 30 seconds. Future/current windows are refreshed more often since they're still filling in. A window is only cached once it has enough data from both venues; past windows relax that requirement for Kalshi, since Kalshi removes settled contracts from its API. Price scale note: price is a raw 0–1 decimal probability read/derived directly from each venue's order book — NOT the platform's usual 0–100 cents scale.
Request
- Base URLhttps://data.kairos.trade
- AuthAPI key in header X-Client-Id and API key in header X-Api-Key and API key in header X-Api-Secret
Query parameters
Number of windows from current (0=now, -1=previous, +1=next). Bounded so an absurd offset is rejected with 422 rather than overflowing the window arithmetic.
Response
Crypto markets for the requested window.
Example response
{
"markets": [
{
"price": 0.47
}
]
}Changes
No recorded changes to this operation across all 1 revision of this API.