Best Polymarket historical data APIs
Full matrix — official Polymarket APIs plus PolyOrderbooks, PolymarketData, Telonex, DepthFeed, Predexon, Dune, PolyBackTest, PolyTest, and polyReplay. Pricing, L2, Python, and bulk export.
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Polymarket Data API Comparisons
Factual, source-linked guides for historical Polymarket data providers — APIs, order-book archives, pricing models, and developer workflows. Facts are taken from current public documentation and reverified periodically.
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Compare the full provider landscape
When you need the full landscape — official APIs plus every major archive we track.
Before comparing features, it is worth checking whether a provider's data is internally consistent at all. The provider comparison has a four-line test you can run on any sample.
Prefer describing the strategy to writing the replay loop? Backtest AI turns a plain-English idea into a run against the same L2 archive, with AI analysis of every backtest.
Alternatives
Provider-specific comparisons
Focused guides when you are evaluating or migrating from a particular vendor.
Migration Dome API alternative
Migration guide after Dome’s end-of-life — what to replace for historical Polymarket workflows.
Read comparison →Commercial PolymarketData alternative
Side-by-side on L2 resolution, API limits, pricing model, and developer workflow.
Read comparison →Workflow Telonex alternative
Queryable REST archive vs daily Parquet tick pipelines — when each workflow fits.
Read comparison →Depth capture DepthFeed alternative
Event-driven full-depth capture vs query-resolution historical APIs.
Read comparison →On-chain Dune alternative
On-chain analytics vs stored L2 — why Dune SQL cannot rebuild the off-chain book.
Read comparison →Backtesting PolyBackTest alternative
BTC/ETH Up/Down full-depth order book backtesting vs ongoing 250ms Polymarket crypto L2.
Read comparison →Backtesting PolyTest alternative
Sub-second BTC/ETH/SOL Up/Down backtesting with 8-level depth vs broader 250ms full-ladder coverage.
Read comparison →Multi-venue Predexon alternative
Multi-venue data layer vs a Polymarket-specialized historical archive.
Read comparison →Tick archive polyReplay alternative
BTC/ETH Up/Down tick specialization vs broader Polymarket historical API coverage.
Read comparison →Adjacent PolyObserve alternative
Weather market intelligence vs a historical crypto L2 archive — a category split with published pricing.
Read comparison →
Rankings
Best-of rankings and venue comparisons
Ranked guides and head-to-heads that answer the question directly — where the matrix leaves off.
Best-of rankings
API Best Polymarket API
Ranked APIs for live prices, 250ms historical L2, 1-minute breadth, and bulk.
Read ranking →Providers Best data providers
Official API through enterprise archives — coverage, resolution, and pricing.
Read ranking →Historical Best historical data sources
Archives ranked by job: 250ms L2, on-chain fills, 1-minute L2, tick Parquet.
Read ranking →Order book Best order book data
Who captures depth, at what fidelity — 250ms on through tick-level Parquet.
Read ranking →Price history Best price history
Ranked by whether the price series ships with the book behind it.
Read ranking →Book API Best order book API
Depth endpoints compared on history, depth, and grid — the matrix facts.
Read ranking →Trading API Best trading-tool API
The live plane for execution and the historical plane for testing, split honestly.
Read ranking →Backtesting Best backtesting data
Which archives preserve executable depth and which windows are too shallow.
Read ranking →Research Best data for research
Depth studies, microstructure, flow, and on-chain settlement — sized samples.
Read ranking →Tools Best data tools
SDKs, MCP servers, SQL APIs, dashboards, and Parquet pipelines by workflow.
Read ranking →Free Best free Polymarket data
What each free tier really grants — a trial versus a working pipeline.
Read ranking →Live Best live data sources
State from the official API, history-under-construction from archives.
Read ranking →Strategies Best trading strategies
Five families that survive honest backtesting on bound-sitting books.
Read ranking →MCP Best MCP servers
What an MCP gives AI agents, and the honest limits of agent data access.
Read ranking →
Venue and provider head-to-heads
vs PredictIt Polymarket vs PredictIt
Regulated academic tool vs permissionless 250ms order-book venue.
Read comparison →vs Kalshi Polymarket vs Kalshi
CFTC-regulated event contracts vs a permissionless book — fees and data.
Read comparison →vs Manifold Polymarket vs Manifold
Play-money mana lab vs a USDC order book worth backtesting.
Read comparison →vs Metaculus Polymarket vs Metaculus
Forecast tournament with Brier scores vs a traded book.
Read comparison →vs NovaPredict Polymarket vs NovaPredict
Bonus-backed betting vs fee-free USDC order book.
Read comparison →vs Sportsbook Polymarket vs sportsbook odds
Vig, liquidity, and cadence against a 250ms recorded book.
Read comparison →PolyHistorical PolyHistorical vs PolyOrderBooks
300ms BTC/ETH/SOL spec vs the wider 250ms archive, on the facts.
Read comparison →Protodex Protodex vs PolyOrderBooks
A 15-minute flat CSV dataset vs a queryable 250ms archive.
Read comparison →PolyBackTest PolyBackTest vs PolyOrderBooks
A backtesting-first service compared straight on the deciding factors.
Read comparison →
FAQ
What is the best Polymarket data API?
It depends on workflow: official Polymarket APIs are free and best for price history and current books; archived full L2 needs a third-party provider. PolyOrderbooks, PolymarketData, DepthFeed, and Predexon serve REST historical L2; Telonex and polyReplay serve tick/Parquet archives. See the provider matrix for side-by-side facts.
Does Polymarket's official API provide historical order books?
The official API documents GET /book for current L2 order books and /prices-history for historical price series, but not a documented arbitrary historical full-L2 archive endpoint. Third-party providers store historical order books and expose them over REST, CSV, Parquet, or S3 delivery.
How are these comparisons verified?
Provider facts are taken from each provider's current public documentation and pricing pages at a stated verification date, and are reverified periodically. Measured claims (such as replay accuracy) state their sample size and method on the page.
Can I download the provider comparison?
Yes — a CSV export of the same provider fields is available on the best historical data APIs page and the datasets area, with no signup required.
Download the comparison
Prefer spreadsheets? Export the current provider matrix as CSV — same fields as the on-site tables, no signup required.