Best Polymarket historical data APIs and datasets in 2026
Polymarket keeps one price series per token and nothing else from the past, so every provider on this list is a recorder, and the differences are what each one recorded, since when, at what resolution, and for what price. Facts are read from each vendor's own site; entries carry the date they were read, August 3, 2026 unless stated. Marketlens is on the list and the "best for" lines say plainly when another provider is the better pick.
marketlens
polymarketdata.co
depthfeed.com
polyhistorical.com
pmdata.dev
polybacktest.com
polytest.io
telonex.io
polyorderbooks.com
predexon.com
resolvedmarkets.com
tardis.dev
Best for
Every Polymarket market type with full depth history and a backtest engine that replays the books.
Minute prices and 1-minute books across categories, with the deepest window on its top tier.
Crypto up/down on four venues with an in-browser backtest lab and paper trading.
Cheap 300 ms snapshots on BTC, ETH, and SOL up/down over a rolling window.
Tick-by-tick crypto up/down Parquet with an hftbacktest path.
An AI agent that writes and runs strategies on a rolling crypto window.
Sub-second BTC, ETH, and SOL replay aimed at AI coding tools.
Parquet file pipelines across Polymarket, perpetuals, Predict.fun and Binance.
Crypto up/down L2 over a REST API with a low entry price.
On-chain history back to 2020, wallet analytics, and a live WebSocket across two venues.
High-rate crypto book snapshots with a SQL-shaped backend for research.
Teams already on Tardis for exchange data who want Polymarket in the same CSV and API format.
The official Polymarket API
Free, no key for reads, and the right source for the current book and live updates. For history it offers the CLOB prices-history endpoint: one price per bucket for one outcome token, minute fidelity. No past order books, no trade history, no bulk. The API guide covers all four official surfaces and price history shows the endpoint in use.
Free datasets
Sample files sized for a notebook: Marketlens publishes a full day of BTC 5 minute order books, the 2026 World Cup final, and every resolved market on Hugging Face and Kaggle, listed on the dataset page. Community GitHub repositories and Kaggle datasets carry self-recorded slices of varying span and resolution; check the capture method and the gaps before building on one.
How to choose
Four questions settle it. Which markets: crypto up or down only, or sports, weather, politics, and events too. How deep: a price line, minute snapshots, or every price change with full depth. How far back: a rolling month, or a complete archive from a fixed date. What you do with it: charts, research, or a backtest that needs the book to fill against. Marketlens answers every market type, every price change at millisecond resolution, complete since March 1, 2026 (903,238 markets, 37.9B order book rows), with the backtest engine built in; the per vendor pages under compare say where each alternative wins.
FAQ
Common questions
What is the best Polymarket historical data API?
It depends on the market types and the depth you need. For every Polymarket market type with full depth order book history and a backtest engine, Marketlens. For crypto up or down books at a low entry price, polyorderbooks.com, polyhistorical.com, polytest.io, or pmdata.dev. For on-chain trade history back to 2020 and Kalshi in the same API, predexon.com. For Parquet pipelines that also cover perpetuals and Binance, telonex.io. The table on this page lists what each keeps and charges, with the date each entry was read.
Does Polymarket provide historical data itself?
Only one price series per outcome token (the CLOB prices-history endpoint). Past order books, trade history, candles, and bulk downloads come from third party recorders, which is why this list exists.
Which Polymarket data providers have a free tier?
As of the dates in the table: Marketlens (25 million rows per day, full archive), polyorderbooks.com (3 days of history, 1,000 requests per day), predexon.com (1 request per second, 1,000 premium requests per month), resolvedmarkets.com (5,000 credits per month), depthfeed.com (7 days), polyhistorical.com (limited BTC), polybacktest.com (recent BTC markets), polytest.io (30 recent markets), polymarketdata.co (prices without books), telonex.io (5 file downloads), and pmdata.dev (a capped trial).
Are there free Polymarket datasets?
Yes. Marketlens publishes samples on Hugging Face and Kaggle (a day of BTC 5 minute order books, the 2026 World Cup final, every resolved market), and several community GitHub repositories and Kaggle datasets carry self-recorded slices. See marketlens.trade/polymarket-dataset.
Try it
Try the one with every market type
Full depth order book history and a backtest engine on the free tier: 25M rows per day, no card required.
$ pip install marketlens