Data vendorsAPIfree
Polymarket blockchain data: what it covers, what it costs, where it stops
Last checked 2026-09-08
Polymarket's Data Resources page is the venue's own pointer to on-chain data providers. Trades, balances, positions and redeems land on Polygon, and the page lists where to query them: Goldsky streaming pipelines, the Goldsky and ClickHouse CryptoHouse SQL service, Dune, and Allium. It also links seven analytics dashboards and four community Dune dashboards.
The page is for builders, researchers and analysts who want free, verifiable data rather than a vendor. It pairs with Polymarket's public subgraph repo, which defines the indexers those providers run.
What it covers
Goldsky: real-time streaming pipelines that push Polymarket on-chain activity into your own database or warehouse. Goldsky also partnered with ClickHouse on CryptoHouse, where Polymarket on-chain data is queryable with SQL.
Dune: SQL over the same activity, with three starter queries linked from the page (notional volume with maker and taker USDC volume, TVL as USDC locked in Polymarket contracts, and estimated open interest over time). Allium: another SQL analytics platform with Polymarket activity.
- Dashboards linked: Blockworks, Artemis, Dune, DeFiLlama, The Block, Token Terminal, Allium.
- Community Dune dashboards by @datadashboards (overview), @hildobby (volume, OI, markets, addresses, TVL), @alexmccullaaa (historical accuracy) and @defioasis (builders).
- The public subgraph repo (Polymarket/polymarket-subgraph, 218 stars, LGPL-3.0) defines activity, fpmm, oi, orderbook, pnl, polymarket and sports-oracle subgraphs and is built for deployment on Goldsky.
Pricing
The page and the subgraph repo are free. Goldsky, Dune and Allium each have their own plans; those were not checked here and the page does not state them.
Venues and data
Polymarket only, and only what reaches the chain: fills, splits, merges, redeems, balances and positions. Resting orders on the CLOB never touch Polygon, so order book depth and cancelled orders are not in any of these sources.
The maintainers of the poly_data pipeline (2,326 stars) report that Polymarket moved to new CTF Exchange contracts on April 28, 2026 and stopped supporting the old subgraph indexer, and that a Goldsky subgraph poll no longer returns complete data. Check which contract addresses a given Dune query or subgraph reads before trusting a series that spans that date.
Where it falls short
It is a link page, not a dataset. There is no download, no schema and no history floor stated; each provider has its own. Order book history is absent by construction, which is the gap polymarketdata.co and DepthFeed sell into.
Kalshi is a regulated exchange with no on-chain footprint, so none of this applies to Kalshi data.
Who should use it
Analysts who want to verify volume, open interest or a wallet's fills against the chain, and builders deciding between running the subgraph themselves and paying a vendor.
Traders who need depth or tick data should go to a recorded order book source instead.
Questions about Polymarket blockchain data
Where can I get Polymarket on-chain data for free?
Polymarket's Data Resources page lists Dune, Allium, Goldsky's CryptoHouse SQL service, and the public subgraph repo. The page itself is free; provider plans vary.
Does Polymarket have a subgraph?
Yes. Polymarket/polymarket-subgraph on GitHub (218 stars, LGPL-3.0) defines activity, orderbook, pnl, open interest and other subgraphs and is built for Goldsky deployment.
Can I get Polymarket order book history from the blockchain?
No. Only fills, splits, merges, redeems and balances land on Polygon. Resting orders live on the off-chain CLOB, so depth history has to come from a service that recorded it.
Official APIs for building. One book for trading.
Rather trade the spread than build the plumbing? The free Kairos terminal gives you Kalshi, Polymarket and Predict.fun in one order book.