01 · Overview
What is PredictionData.dev?
PredictionData.dev delivers historical Polymarket and Kalshi datasets in analysis-friendly formats including CSV and Parquet. Best for: Quantitative researchers who need downloadable, reproducible market data. Less suitable for: Live traders who need an execution interface or wallet analytics. Key limitations: Dataset coverage and sampling differ by venue and product; inspect the data dictionary before comparing markets.
02 · Best for
Who is PredictionData.dev best for?
Best for
Quantitative researchers who need downloadable, reproducible market data.
Not ideal for
Live traders who need an execution interface or wallet analytics.
Dataset coverage and sampling differ by venue and product; inspect the data dictionary before comparing markets.
03 · Access & execution
How do access and execution work?
04 · Sources & verification
How was PredictionData.dev verified?
Detailed catalog review passed on 2026-08-25. Current availability, scope, official-source coverage, taxonomy, bilingual copy, commercial facts, permissions, execution behavior, and risk framing were checked. Any unconfirmed facts are recorded separately as editorial uncertainty.