OpenChainBench
Full benchmark: Polymarket WebSocket latency, live connection and update speed from 3 regions
TradingKalshi

Kalshi WebSocket

As of July 29, 2026, Kalshi WS connect to snapshot is 10.00 s at the median (p50, 24h window), with 10.00 s at p90 and 10.00 s at p99. Kalshi ranks #2 of 2 chains measured on this benchmark.

Kalshi's WebSocket API at wss://api.elections.kalshi.com/trade-api/ws/v2 requires RSA-PSS-SHA256 signed authentication headers (KALSHI-ACCESS-KEY, KALSHI-ACCESS-TIMESTAMP, KALSHI-ACCESS-SIGNATURE) and a US IP address. The us-east probe node connects with a keyed account and records connect-to-snapshot and inter-arrival metrics. The eu-west and sgp probe nodes return 403 even with valid credentials, so Kalshi's latency in the rank matrix reflects us-east only. The connect-to-snapshot number shown for Kalshi is therefore comparable to Polymarket's us-east column, not its global average.

How Kalshi compares

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

  1. #1Polymarket2.02 s
  2. #2Kalshi10.00 s

Methodology, charts and the full ledger live on the Polymarket WebSocket latency, live connection and update speed from 3 regions page. Raw data: JSON endpoint.