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KALSHI APIPUBLIC MARKET DATA · NO KEY
Kalshi API reference
Public market-data endpoints (series, events, markets, orderbook) need no authentication. Trading calls are signed: Ed25519 recommended; RSA (2048-bit) with RSA-PSS SHA-256 still supported. Recommended host: external-api.kalshi.com.
MARKETS ENDPOINT
GET /trade-api/v2/markets?series_ticker=KXBTCD&limit=1&status=open
Host: external-api.kalshi.com
200 OK, no auth header (7 OCT 2026)
{ "cursor": "…", "markets": [ … ] }
AUTH
Key + Ed25519 sig
RATE LIMIT
200 reads/s (Basic)
WEBSOCKET
Yes
WHAT WE ADD
Each series carries its fee rule. Reading all 14,698 is how we know 163 charge maker fees, a list Kalshi's help centre describes only as special events.
SPONSORSHIP
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