groundhog.markets

Connect it to your AI

Claude Code

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

Claude, ChatGPT, Cursor and other apps

Add it as a custom connector with this URL (Streamable HTTP):

https://groundhog.markets/mcp

Cursor, VS Code and other apps (mcp.json)

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

Tools it offers

8 tools, as the server itself reported during our check on Oct 31, 2026.

• forecastDaily 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
• placesFind a place slug by name, City, ST, airport code or lat,lon; says full blend or grid only.
• sourcesOpen sources groundhog uses: licence, latest run, age, status.
• marketsWeather 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 pri
• receiptsHow often our settle value matched the venue's result, with every miss. No prices.
• searchSearch places by name, City, ST, airport code or lat,lon. Returns {results: [{id, title, url, text}]}; pass an id to fetch.
• fetchThe 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.
• historyAs-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,

Questions