Realtime feed: Kalshi and Polymarket in Tokyo, Coinbase in Ohio and Tokyo
Self-serve realtime access now streams three more markets: Kalshi and Polymarket at a new Tokyo endpoint (AWS ap-northeast-1), and Coinbase Spot at our Ohio and Tokyo endpoints — bought by the UTC day, one API key for every market.
Same prices as the Binance markets: €79.20 per market-day (public-beta price, 20 % off the list price of €49 / €99 for every day bought during the beta); Coinbase instruments also by the instrument-day (€39.20).
Prediction markets: the whole market, by the day
Kalshi and Polymarket are sold as whole markets only. Their contracts list and settle around the clock — a 15-minute contract is over before a paid UTC day begins — so a market-day covers every contract, and you subscribe to the ones you trade. The instrument directory (with your key) lists every listed and open contract and keeps up through a delta feed; prices are probabilities between 0 and 1.
What streams
Full order-book depth (snapshot + incremental updates) and every trade, per instrument. These markets have no separate top-of-book stream and no derivatives topics — the Binance markets keep theirs.
Endpoints
- Ohio (AWS us-east-2) — Coinbase (Ashburn) → Ohio over dedicated fiber, ~4.6 ms one-way
- Tokyo (AWS ap-northeast-1) — Coinbase (Ashburn) → Tokyo over dedicated fiber, ~67.7 ms one-way
- Tokyo (AWS ap-northeast-1) — Kalshi (Ohio) → Tokyo over dedicated fiber, ~64.1 ms one-way
- Tokyo (AWS ap-northeast-1) — Polymarket (London) → Tokyo over dedicated fiber, ~69.8 ms one-way
Every latency figure is one-way line latency from the site where the venue is captured to our endpoint — the venue's own latency and the on-ramp to your client come on top.
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