Prediction market API rate limits, tested with a daily ramp
TradingPredictIt
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Smarkets
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PredictIt vs Smarkets
PredictIt vs Smarkets on 2 shared OpenChainBench benchmarks, awaiting live measurements.
PredictIt
CFTC-regulated US political prediction market. Real-money contracts on US elections, legislation and political events. REST API returns market data without authentication; rate-limited to 5 requests per minute.
Smarkets
UK-regulated peer-to-peer betting exchange with a public CLOB REST API. Covers political, sports and entertainment markets. No authentication required for market data including full order book quotes.
Side by side measurements
Best prediction market API, ranked by live latency and uptime
TradingPredictIt
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Smarkets
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Frequently asked questions
PredictIt vs Smarkets: which one is better?
PredictIt and Smarkets are compared on 2 shared OpenChainBench benchmarks. See the live table on this page for every metric.
How is the PredictIt vs Smarkets comparison measured?
Every benchmark on this page uses the same open methodology, published at https://openchainbench.com/methodology. Data is CC-BY-4.0. Measurement harnesses are MIT-licensed.
How this pair was selected
A pair is published when all four conditions hold. Both providers run in the same OpenChainBench benchmark for at least seven consecutive days. Each provider has at least 1000 samples in the measurement window. The head to head query has observable third party search demand. Both providers have a public /products/[slug] page on OCB. The full pair ledger is versioned in the public repo so the methodology is externally verifiable.