PredictionScan
ChatGPT pluginPrediction market data
PredictionScan brings prediction market data into ChatGPT for anyone tracking real-world events. Ask whether something will happen (an election, a Federal Reserve decision, a recession, a ceasefire, a court ruling, a crypto price or an award show) and get the current market-implied probability of each outcome, how it has changed, and what is moving it.
What you can ask
- Search markets: find open markets on any topic with their current odds.
- Market odds: the outcomes of a market or event, ranked by probability, with its status, end date and resolution rules.
- Price history: a chart of how the odds moved over a day, a week, a month, three months or all time.
- Biggest moves: the markets whose probabilities swung the most in the last 24 hours, with already-decided markets left out.
- Trending markets: the most-traded markets right now, overall or by category.
- Large trades: the largest recent trades across all markets or in one market, with dollar size, price and the trader's public name.
- Market flow: who is buying and selling a market, with net flow by outcome, the largest trades and the top holders.
- Trader leaderboard: top traders by profit or by volume for a day, week, month or all time.
- Trader profiles: a public trader's stats, top positions and recent trades, by username or wallet address.
- Trader positions: up to 50 of a public trader's open positions, sorted by value or by profit.
- Market news: recent headlines from major news outlets about a market or topic.
Answers include plain-text summaries. Interactive views (odds bars, charts, tables or headlines) are available in supported ChatGPT surfaces; not every chat answer displays a card. Market and trader results link to read-only analytics pages on predictionscan.org, operated by PM Data Services.
Beyond raw prices PredictionScan adds its own analysis to the public market data: it ranks the outcomes of multi-outcome events, keeps already-decided markets and individual sports matches out of the default movers and trending lists, shows who is buying and selling a market, scans the public trade feed for the largest trades, matches markets with headlines from its own news index, and summarizes every result in plain English.
How to read the numbers A price of 74 cents means the market puts the chance at about 74%. These are crowd forecasts from traders on Polymarket.com. They are not certainties, not PredictionScan's own predictions, and not advice.
Read-only and informational PredictionScan only reads public data. It cannot place or cancel trades, move funds, connect a wallet or sign in to any account. Links in its answers open those analytics pages, except news headlines, which open the publisher's article. Everything it returns is informational only, not financial advice, and never a recommendation to buy or sell. Trading is risky; 100% loss can occur.
Data sources and privacy Odds, prices, trades, holders and leaderboards come from the public APIs of Polymarket.com. Headlines come from PredictionScan's own news feed of major outlets. No account or sign-in is needed. PredictionScan receives the arguments in tool requests sent by ChatGPT (for example a search phrase or a market name); ChatGPT may derive these arguments from relevant chat context. For usage counts it records the tool name, the time, the client's user agent and a keyed one-way hash of the IP address. Details: predictionscan.org/privacy.
About PredictionScan is operated by PM Data Services. Independent. Not affiliated with or endorsed by Polymarket.
- Featured
- No
not on the featured shelf
Movement
From our daily snapshots over the last 30 days.
Rank by placement
Rank in Data & analytics
In its category
How this plugin compares with others in the same category. Positions are counted within the category, not across the whole directory.
Data & analytics617th of 623 by placement
| # | Plugin | Position | 7d |
|---|---|---|---|
| 615 | #10486 | — | |
| 616 | #10499 | — | |
| 617 | #10506 | — | |
| 618 | #10538 | — | |
| 619 | #10547 | — |
Example prompts
- “What are the odds the Fed cuts rates at its next meeting? Show every rate-change size and the market end date.”
- “Who will win the 2028 US presidential election, according to prediction markets?”
- “What prediction markets moved the most today?”
- Categories
- Made by
- PM Data Services · Website
- Sign-in
- On Install
- Capabilities
- Search open prediction markets on any topic, Show market-implied odds for every outcome of a market, Rank the candidates or outcomes of multi-outcome events, Explain a market's status, end date and resolution rules, Chart how a market's odds changed over a day, week, month or longer, List the markets with the biggest probability moves in the last 24 hours, List the most-traded markets right now, overall or by category, Show recent large trades across all markets or in one market, Show buy and sell flow, largest trades and top holders for a market, Rank top traders by profit or volume for a day, week, month or all time, Look up a public trader's stats, positions and recent trades, Find recent headlines from major outlets about a market or topic, Answer "will it happen?" questions about real-world events with market-implied probabilities, Track the odds on elections, Fed decisions, geopolitics, the economy, crypto prices and award shows, Read-only: cannot place trades, move funds or sign in to accounts
- Availability
- Available
- Version
- 1.1.0
- Keywords
- prediction markets, Polymarket, odds, market odds, election odds, forecast, probability, market-implied probability, politics, elections, economics, Federal Reserve, interest rates, crypto, world events, price history, trending markets, large trades, trader leaderboard, news, real-world events, event tracking, event odds, will it happen, chances, likelihood, crowd forecast, geopolitics, recession odds, Fed rate cut odds, court rulings, award shows
- Created
- October 29, 2026
- More info
- Sponsorship
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