Polymarket Scraper - Prediction Market Odds & Volume

Read Polymarket prediction market data without an API key or a wallet. Choose the markets with most volume in the last 24 hours, a topic such as politics or crypto, or a single event, and the Actor returns one row per market with the question, outcomes, probabilities, last trade, bid and ask, spread, volume, liquidity, dates and resolution rules. Schedule it and markets whose odds moved since the previous run are reported with the difference. Forecasting research, news and sentiment signals, dashboards and datasets at $0.0005 per market.

This Actor only reads public data. It does not place orders or connect to any wallet, and its output is not financial advice.

What you get

Market (one row each): id, question, url, eventTitle, eventSlug, outcomes, probabilities, leadingOutcome, leadingProbability, lastTradePrice, bestBid, bestAsk, spread, volume, volume24h, volume1w, liquidity, startDate, endDate, active, closed, resolutionSource, description, position.

Source on every row: source.

Changes on scheduled runs: probabilityChange is the change of the first outcome since the previous run (null on the first run).

Events that do not exist return a row with an error field and are not charged.

How to use it

1. Open the Input tab.
2. Add Sources, one per line (up to 200 per run): top for the markets with most 24-hour volume, tag:politics or tag:crypto for a topic, or an event as https://polymarket.com/event/<slug> or its slug.
3. Set Max markets per source (up to 500).
4. Click Start and export the rows as JSON, CSV or Excel.
5. Schedule the Actor to follow how the odds move.

Input

{
  "sources": ["top", "tag:politics"],
  "maxMarkets": 50
}

Output

{
  "source": "top",
  "position": 1,
  "id": "6430628",
  "question": "Counter-Strike: Nemiga vs FURIA (BO5) - PGL Masters Bucharest Playoffs",
  "url": "https://polymarket.com/event/cs2-nemi1-furia-2026-10-31",
  "eventTitle": "Counter-Strike: Nemiga vs FURIA (BO5) - PGL Masters Bucharest Playoffs",
  "eventSlug": "cs2-nemi1-furia-2026-10-31",
  "outcomes": ["Nemiga", "FURIA"],
  "probabilities": [0.405, 0.595],
  "leadingOutcome": "FURIA",
  "leadingProbability": 0.595,
  "lastTradePrice": 0.37,
  "bestBid": 0.4,
  "bestAsk": 0.41,
  "spread": 0.01,
  "volume": 2980708.35,
  "volume24h": 3013342.67,
  "volume1w": 3013342.67,
  "liquidity": 30308.96,
  "startDate": "2026-10-30T18:45:22Z",
  "endDate": "2026-10-31T17:00:00Z",
  "active": true,
  "closed": false,
  "resolutionSource": "https://hltv.org",
  "description": "This market refers to the Counter-Strike Grand final match...",
  "probabilityChange": null,
  "timestamp": "2026-10-31T10:00:00.000Z"
}

Pricing

Pay per event: $0.0005 per market and $0.0005 per market whose odds moved on a scheduled run. Unknown events are free. Top 50 markets every hour cost at most $1.20 a day.

Limits and notes

• Probabilities are the outcome prices published by Polymarket, from 0 to 1.
• Order books and trade history are not included.
• A tag: source reads the 20 open events with most 24-hour volume in that topic and returns their markets up to your limit.

Related Actors

• Yahoo Finance: quotes and price history.
• Google News: news behind a move.
• Finviz Screener: stock screens.