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Kalshi is a US event exchange regulated by the CFTC as a designated contract market. Contracts settle at $1 if the event happens and $0 if it does not, so a live price reads as an implied probability — the same shape as the other venues on this page. Unlike Polymarket and Predict.fun it is not a conditional-token market on a public chain: contracts are exchange-listed instruments, identified by a market ticker rather than an on-chain token id.
Kalshi order books are in rollout and are not callable yet. GET /stream/capabilities reports the live per-venue state and is the authoritative answer for what you can subscribe to today; it currently returns implemented: false for kalshi. Check that field rather than this page before you build.
Kalshi is a Market Data venue only. There is no Kalshi trading, copy-trading or trader analytics on Bravado, and none is in rollout — see product coverage below.

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What is in rollout

Live order books. When the venue goes live, Kalshi books are served over the same authenticated WebSocket surface, in the same message envelope, as the venues already documented in multi-venue order books: one socket, many assets multiplexed, prices and sizes as decimal strings. No connection details are published here, because there is nothing to connect to yet. When there is, GET /stream/capabilities will carry the path and the subscription shape for kalshi alongside the other venues, and this page will name them.

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Checking the live state

GET /stream/capabilities is the contract for what this venue serves, per organisation, right now. It separates three facts that are easy to read as one: While implemented is false, there is no path and no subscription to call. Treat a venue named in that payload as a published status, not an endpoint.

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Access

Kalshi is a read-only data entitlement, granted separately from the trading venues. Holding Polymarket or Predict.fun access does not include it. Market Data connections need a credential with stream.read on an eligible paid plan — see authentication and API credits.

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Product coverage

Tax statements, PMWAS reconciliation and entity rollups are Polymarket-only.

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Venue details