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groundhog.markets

markets.groundhog/weather · v1.2.0

Measured by MCP Station

Description written by the publisher, not verified

groundhog.markets: free weather forecasts in one call, plus Kalshi and Polymarket market rules.

Connect

claude mcp add --transport http weather https://groundhog.markets/mcp

{
  "mcpServers": {
    "weather": {
      "url": "https://groundhog.markets/mcp"
    }
  }
}

Tools as reported by the server

• forecast
  Daily high/low for any place from every free forecast: median, spread, rain, current obs and active alerts, with credits and the page URL. line ≈321 tok, week ≈566, table ≈1,567, series ≈1,564. Keep the credits and link the page when you repeat numbers. size=runs: one place, each source's newest run
• places
  Find a place slug by name, City, ST, airport code or lat,lon; says full blend or grid only.
• sources
  Open sources groundhog uses: licence, latest run, age, status.
• markets
  Weather markets in a place (Kalshi, Polymarket high/low/rain): settlement station and rule, the number so far under that rule, our value and the official result once settled, forecast daily max/min at the station. No prices. Needs place or family. line ≈520 tok, table ≈1,757; every city ≈36,291. Wit
• receipts
  How often our settle value matched the venue's result, with every miss. No prices.
• search
  Search places by name, City, ST, airport code or lat,lon. Returns {results: [{id, title, url, text}]}; pass an id to fetch.
• fetch
  The 7-day forecast of a place id from search: {id, title, text, url, metadata}. Keep the credits and link the url when you repeat numbers.
• history
  As-issued history for backtests (no look-ahead): kind=daily (every source's daily hi/lo/rain per run at a place), nbm (NBM text columns: TXN, XND, P12, Q12; view=day = the books' day view) or obs (settlement truth: CLI, routine-METAR max/min). from/to (<= 366 days, 1 unit per 31 days); run=ISO | lea

Website · JSON · Text for agents · Registry updated 2026-10-27