Polymarket

Finance

gamma-api.polymarket.com

Prediction market data: events, markets, outcome prices, order books and price history from Polymarket's public Gamma and CLOB APIs.

Runs on your machine under the source's own terms

The crw MCP on your computer calls Polymarket directly. Calls cost no credits and the data does not pass through fastCRW. Install it once for Claude Code, Cursor, Codex, Windsurf, Gemini CLI or OpenCode, with your fastCRW API key in place of the placeholder:

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Capabilities (13)

polymarket/clob-marketFree, runs locally

The exchange's own record for a market: its tokens, tick size, minimum order size and whether it accepts orders.

conditionId

polymarket/eventFree, runs locally

One event with every market under it, including each market's outcomes and prices.

eventId

polymarket/eventsFree, runs locally

Events grouping related markets, with aggregate volume, liquidity and the markets inside each.

limit?offset?order?ascending?active?closed?archived?tag_id?slug?id?

polymarket/marketFree, runs locally

One market in full: question, description, outcomes, prices, volume, the CLOB token ids and resolution details.

marketId

polymarket/marketsFree, runs locally

Open and resolved markets with their question, outcomes, current prices, volume, liquidity and resolution dates.

limit?offset?order?ascending?active?closed?archived?tag_id?slug?id?liquidity_num_min?volume_num_min?start_date_min?end_date_min?

polymarket/midpointFree, runs locally

The midpoint between best bid and best ask for one outcome token.

token_id

polymarket/order-bookFree, runs locally

The live bids and asks for one outcome token, each with price and size.

token_id

polymarket/priceFree, runs locally

The current best price for one outcome token on one side of the book.

token_idside

polymarket/price-historyFree, runs locally

Historical prices for one outcome token over an interval, at the requested resolution.

token_idintervalfidelity

polymarket/searchFree, runs locally

Search events, markets and profiles by text, returning typed matches.

qlimit?events_status?search_tags?search_profiles?

polymarket/seriesFree, runs locally

Recurring market series, such as a monthly figure that is re-run each period.

limit?offset?order?ascending?slug?

polymarket/spreadFree, runs locally

The bid-ask spread for one outcome token.

token_id

polymarket/tagsFree, runs locally

The topic tags markets are filed under, with their ids for filtering.

limit?offset?order?ascending?

Licence

You agree that you will not: Access or use any data, content, or information contained on our Site, any Interface or Features directly or through an API, or any other means, including on-chain, whether in raw, derived, aggregated, or anonymized form (the “Data”) if you are (i) a non-retail, professional entity that engages in capital markets activities (e.g., brokerage, market making, proprietary trading, index calculation, or ETF issuance), including but not limited to broker-dealers, futures commission merchants, registered investment advisors, hedge funds, investment managers, proprietary trading firms, commodity pool operators, financial technology companies, banks, clearing houses, and exchanges or an affiliate of any such entity (each, a “Capital Market Client”), or (ii) a market data distributor, in each case unless otherwise agreed to in writing by us.

https://polymarket.com/tos

Attribution

Display this wherever you show the data. It arrives on every response as provenance.attributionText.

Data from Polymarket

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