Kalshi API rate limits and latency
As of June 16, 2026, Kalshi warm book latency is 121 ms at the median (p50, 24h window), with 366 ms at p90 and 541 ms at p99. Kalshi ranks #3 of 5 chains measured on this benchmark.
Kalshi documents a token bucket per access tier, around 20 requests per second for basic read access. Its order book and single market endpoints go to origin on every request, but the market list is served from CloudFront with max-age=15, so list reads measure the edge. The WebSocket requires authentication, so Kalshi is absent from the WS panel. Our ramp stops at the first 429. Warm book p50: 121 ms.
How Kalshi compares
Live p50 over the last 24 hours across every chain on this benchmark, ranked lowest first.
Methodology, charts and the full ledger live on the Prediction market API rate limits, tested with a daily ramp page. Raw data: JSON endpoint.