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

Metaculus API latency

Metaculus API latency (price endpoint) is measured continuously on this benchmark. Live numbers will appear here as soon as the harness reports fresh samples.

Metaculus is a public forecasting aggregator with no real-money markets, probed via its /api2/questions/{id}/ endpoint every 5 seconds from three regions. No authentication is required and no CDN cache layer was detected on the single-question endpoint. Metaculus has no order book and no WebSocket: all data access is REST. The uptime panel shows the live health gauge for the question API; the latency reflects the Django origin server without a CDN buffer. For builders querying aggregate community forecasts rather than market prices, Metaculus is the only venue in this cohort with a purely public read API at sub-second latency.

How Metaculus compares

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

  1. #1Limitless95 ms
  2. #2Polymarket200 ms
  3. #3Kalshi322 ms
  4. #4Manifold500 ms
  5. #5Myriad1.26 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.