OpenChainBench
Full benchmark: Best prediction market API, ranked by live latency and uptime
TradingPredexon

Predexon API latency

As of July 15, 2026, Predexon API latency (price endpoint) is 351 ms at the median (p50, 24h window), with 582 ms at p90 and 2.11 s at p99. Predexon ranks #4 of 6 chains measured on this benchmark.

Predexon is a multi-venue aggregator that unifies Polymarket, Kalshi and Limitless behind one schema. Its API answers at 351 ms p50 (24h, all regions), measured on the same market-price endpoint the harness probes on the native venues, so the direct comparison of a unified aggregator against three venue-native APIs is head to head. Predexon aggregates upstream data; a Predexon latency higher than the sum of its three underliers is the cost of unification. Lower is the value of having one contract instead of three.

How Predexon compares

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

  1. #1Limitless118 ms
  2. #2Polymarket201 ms
  3. #3Kalshi323 ms
  4. #4Predexon351 ms
  5. #5Manifold363 ms
  6. #6Myriad1.26 s

Methodology, charts and the full ledger live on the Best prediction market API, ranked by live latency and uptime page. Raw data: JSON endpoint.