Pricing

$0.50 / 1,000 prediction market rows

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Polymarket & Kalshi Prediction Markets Scraper (odds, volume)

Try for free

Pricing

$0.50 / 1,000 prediction market rows

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0.0

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Developer

Arthur

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17 hours ago

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Polymarket & Kalshi Prediction Markets Scraper (odds, volume, liquidity)

Export live prediction-market data from Polymarket and Kalshi through their public APIs — no login, no browser, no proxies. One clean row per market or event, ready for dashboards, research, alerts and trading models.

What you get

Polymarket markets: question, YES/NO prices (implied odds), best bid/ask, last trade price, volume (total and 24 h), liquidity, start/end date, status, parent event, slug and URL.
Polymarket events: event title, description, tags, dates, volume/liquidity and the nested markets with their outcome prices.
Kalshi markets: ticker, title, yes/no bid, yes ask, last price (in dollars), volume, 24 h volume, open interest, liquidity, open/close/expiration times, status, rules, URL.
Kalshi events: event ticker, title, category, series, status and nested markets.

Filter by keyword (e.g. fed, bitcoin, election, nba), by status (open / closed / settled) or, for Kalshi, by series ticker (KXBTC, KXFED…). Results are sorted by 24 h volume on Polymarket and paginated with cursors on Kalshi.

Pricing

Pay per result: $0.0005 per stored row. Errors are never charged. 1,000 markets ≈ $0.50.

Input example

{"mode": "polymarketMarkets", "query": "fed", "status": "open", "maxItems": 100}

Output example (Polymarket market)

{"source":"polymarket","mode":"market","id":"3989342","title":"Will the Fed cut rates in September?","slug":"fed-decision-in-september","url":"https://polymarket.com/market/fed-decision-in-september","outcomes":["Yes","No"],"outcomePrices":[0.83,0.17],"yesPrice":0.83,"noPrice":0.17,"volume":1250000.5,"volume24h":84000.2,"liquidity":310000.0,"endDate":"2026-09-17T00:00:00Z","status":"open","fetchedAt":"2026-09-12T20:36:00Z"}

Notes

Data comes from the public Gamma API (Polymarket) and the public trade API v2 (Kalshi). Prices are probabilities between 0 and 1 (Polymarket) or dollars (Kalshi).
No personal data is collected. Use in line with the platforms' terms.
Typical run: 200 markets in under 10 seconds.

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