OpenChainBench
Full benchmark: Prediction market API rate limits, tested with a daily ramp
TradingKalshi

Kalshi API rate limits

As of July 31, 2026, Kalshi warm book latency is 316 ms at the median (p50, 24h window), with 385 ms at p90 and 436 ms at p99. Kalshi ranks #3 of 4 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: 316 ms.

How Kalshi compares

Live p50 over the last 24 hours across every chain on this benchmark, ranked lowest first.

  1. #1Polymarket200 ms
  2. #2Limitless312 ms
  3. #3Kalshi316 ms
  4. #4Myriad1.28 s

Methodology, charts and the full ledger live on the Prediction market API rate limits, tested with a daily ramp page. Raw data: JSON endpoint.