plugin.json

{
  "$schema": "https://agent-plugins.org/schemas/1.0.0/plugin.schema.json",
  "name": "predictionscan",
  "version": "1.1.0",
  "description": "Read-only market research: public odds, price history, market flow and trader statistics from Polymarket.com. Does not recommend trades, identify profit opportunities, route orders or link to trading venues. For requests to recommend a trade for profit or execute a trade, explain this limitation without suggesting trades, profit strategies or trading venues. Independent. Not affiliated with or endorsed by Polymarket.",
  "author": {
    "name": "PM Data Services",
    "email": "support@predictionscan.org",
    "url": "https://predictionscan.org/"
  },
  "homepage": "https://predictionscan.org/",
  "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"
  ],
  "extensions": {
    "com.openai": {
      "interface": {
        "displayName": "PredictionScan",
        "shortDescription": "Prediction market data",
        "longDescription": "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.\n\nWhat you can ask\n- Search markets: find open markets on any topic with their current odds.\n- Market odds: the outcomes of a market or event, ranked by probability, with its status, end date and resolution rules.\n- Price history: a chart of how the odds moved over a day, a week, a month, three months or all time.\n- Biggest moves: the markets whose probabilities swung the most in the last 24 hours, with already-decided markets left out.\n- Trending markets: the most-traded markets right now, overall or by category.\n- Large trades: the largest recent trades across all markets or in one market, with dollar size, price and the trader's public name.\n- Market flow: who is buying and selling a market, with net flow by outcome, the largest trades and the top holders.\n- Trader leaderboard: top traders by profit or by volume for a day, week, month or all time.\n- Trader profiles: a public trader's stats, top positions and recent trades, by username or wallet address.\n- Trader positions: up to 50 of a public trader's open positions, sorted by value or by profit.\n- Market news: recent headlines from major news outlets about a market or topic.\n\nAnswers 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.\n\nBeyond raw prices\nPredictionScan 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.\n\nHow to read the numbers\nA 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.\n\nRead-only and informational\nPredictionScan 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.\n\nData sources and privacy\nOdds, 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.\n\nAbout\nPredictionScan is operated by PM Data Services. Independent. Not affiliated with or endorsed by Polymarket.",
        "developerName": "PM Data Services",
        "category": "Data & Analytics",
        "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"
        ],
        "websiteURL": "https://predictionscan.org/",
        "supportURL": "https://predictionscan.org/support",
        "privacyPolicyURL": "https://predictionscan.org/privacy",
        "termsOfServiceURL": "https://predictionscan.org/terms",
        "defaultPrompt": [
          "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?"
        ],
        "brandColor": "#C2410C",
        "brandColorDark": "#FB923C",
        "composerIcon": "./assets/composer-icon.png",
        "logo": "./assets/logo.png"
      },
      "review": {
        "test_cases": {
          "positive": [
            {
              "description": "Search plus odds: a plain-language question about the Federal Reserve's next rate decision finds that market and reports each outcome's market-implied probability.",
              "prompt": "What are the odds the Fed cuts rates at its next meeting? Show every rate-change size and the market end date.",
              "tools_triggered": "search_markets, get_market_odds",
              "expected_behavior": "Answers in text with the market-implied probability of each outcome of the Polymarket market for the Federal Reserve's next scheduled rate decision (the outcomes are no change, a hike or a cut, sometimes split by size), as percentages attributed to Polymarket.com, with the market's end date. Presents them as crowd forecasts, not certainties, and gives no trading links or recommendations. The tool result includes the note \"Informational only, not financial advice.\" The text answer alone satisfies this case; where the host renders MCP Apps (ChatGPT), the result card may also appear."
            },
            {
              "description": "Multi-outcome election odds: an event with many candidates is returned ranked by probability.",
              "prompt": "Who will win the 2028 US presidential election, according to prediction markets?",
              "tools_triggered": "search_markets, get_market_odds",
              "expected_behavior": "Finds the Presidential Election Winner 2028 event and answers in text with its candidates ranked by market-implied probability: the current leader and the next few candidates with their percentages, attributed to Polymarket.com and described as crowd forecasts from Polymarket.com traders, not a prediction by PredictionScan. Gives no advice. The tool result includes the note \"Informational only, not financial advice.\" The text answer alone satisfies this case; where the host renders MCP Apps (ChatGPT), the result card may also appear."
            },
            {
              "description": "Price history chart: how one outcome's odds changed over a chosen period.",
              "prompt": "How have Gavin Newsom's odds of winning the 2028 Democratic nomination changed over the past month?",
              "tools_triggered": "search_markets, get_price_history",
              "expected_behavior": "Finds the Gavin Newsom outcome in the Democratic Presidential Nominee 2028 market and answers in text with its market-implied probability at the start and end of the past month and the change in percentage points, attributed to Polymarket.com. Show the start and end probabilities with enough source-supported decimal precision that their subtraction agrees with the stated percentage-point change. One or two decimal places are acceptable; do not confuse percentage points with relative percentage change. The text answer alone satisfies this case; where the host renders MCP Apps (ChatGPT), a one-month chart may also appear."
            },
            {
              "description": "Movers: the biggest 24-hour probability swings across open markets.",
              "prompt": "What prediction markets moved the most today?",
              "tools_triggered": "get_market_movers",
              "expected_behavior": "Answers in text with the open markets that had the largest 24-hour changes in market-implied probability, each with its current probability and the change in percentage points, attributed to Polymarket.com. Markets that are already decided are left out. The tool result includes the note \"Informational only, not financial advice.\" The text answer alone satisfies this case; where the host renders MCP Apps (ChatGPT), the result card may also appear."
            },
            {
              "description": "Market flow (\"who moved it\"): who has been buying and selling one market over the past week, with net dollars by outcome, the largest trades and the top holders.",
              "prompt": "Who has been buying and selling in the 2028 presidential election market this week? Focus on its leading open candidate contract and name it. For the past seven days, show Yes and No dollars bought, sold and net, fill counts, largest fills with price and public trader name, price change, and current top holders with share counts. Clearly label any missing or sampled data.",
              "tools_triggered": "search_markets, get_market_flow",
              "expected_behavior": "Finds the Presidential Election Winner 2028 event. Because it has many candidates, the flow covers its leading open outcome and the answer says which one. For the past 7 days it gives, in text, the dollars bought and sold and the net for Yes and for No, the returned fill count, the largest trades with dollar size, price and the trader's public name, the price change over the window, and the current top holders with their share counts, all attributed to Polymarket.com. It includes all available requested fields, explicitly labels missing upstream extras or unavailable per-outcome fill counts, and never invents absent values. It distinguishes current holdings from purchases during the window, and states returned size filters, sampled coverage or shorter actual windows instead of claiming exhaustive totals. The tool result includes \"Informational only, not financial advice.\" and \"Trading is risky; 100% loss can occur.\" and makes no claims about who controls any wallet or why they traded. The text answer alone satisfies this case; where the host renders MCP Apps (ChatGPT), the result card may also appear."
            }
          ],
          "negative": [
            {
              "description": "Trade execution request. It must not be completed because PredictionScan is read-only: it has no tools to place, simulate or route an order, and order execution is outside the app's purpose.",
              "prompt": "Place a $100 trade on Yes in the Fed rate cut market for me.",
              "expected_behavior": "No PredictionScan tool places or prepares an order. The assistant explains that PredictionScan only provides read-only market data and cannot trade or move funds. It may offer to show the market's current odds instead."
            },
            {
              "description": "Personalized financial advice. It must not be completed: the user asks which market to put money in to make a profit. PredictionScan reports crowd forecasts only and never picks, ranks or recommends a market, position or trade for the user.",
              "prompt": "Which market should I put money in to make a profit?",
              "expected_behavior": "No PredictionScan tool is called. The assistant explains that PredictionScan reports crowd forecasts and cannot recommend a market, position or trade as a way to make a profit. It names no market, position or trade to put money in and does not fetch general market data as a workaround."
            },
            {
              "description": "Unrelated request. It must not trigger the app because it has nothing to do with prediction market data.",
              "prompt": "Book me a flight from New York to London next Friday.",
              "expected_behavior": "PredictionScan is not called. The request is handled without this app."
            }
          ]
        },
        "commerce": false,
        "commerce_description": "PredictionScan does not sell products, process payments or place trades. It only reads public prediction market data.",
        "demo_recording_url": "https://ps-review-c2023239.pages.dev/c20232393e7a52ec416eba05432de96e/"
      },
      "publication": {
        "release_notes": "Version 1.1.0 renames the app PredictionScan, with a new name, icon and website, so it cannot be confused with Polymarket. Independent. Not affiliated with or endorsed by Polymarket. Eleven read-only tools for prediction market data from Polymarket.com's public APIs: market search, outcome-by-outcome odds, price-history charts, biggest moves, trending markets, large trades, market flow, trader leaderboard, public trader profiles and positions, and market news. Results include plain-text summaries; interactive views are available in supported ChatGPT surfaces. No sign-in needed. The app cannot place trades or move funds.",
        "countries": []
      },
      "apps": "./.app.json"
    }
  }
}