Official MCP RegistryListed
groundhog.markets
groundhog.markets: free weather forecasts in one call, plus Kalshi and Polymarket market rules.
First seen 28 Oct 2026. Evidence as of 28 Oct 2026.
8
Tools
From an anonymous probe
1
Source listings
Each with its own history
1
Recorded changes
Since first seen
Tools
| Tool | Description | Behaviour |
|---|---|---|
| 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. | Read-only |
| 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 runs by day with run_utc and fetched_at; NBM adds XND, P12, Q12. variable=rain: members' share of 0.01 in or more and heavier (n = model families), NBM calibrated, amounts by source, so far today, month to date; rain line ≈647 tok, table ≈1,955. | Read-only |
| 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 | lead=N (+cycle=H: the run issued N days before) | asof=ISO (what was known then). Rows carry fetched_at and origin (bf:* = backfilled). TSV by default. | Read-only |
| 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. With neither: the list of market cities. | Read-only |
| places | Find a place slug by name, City, ST, airport code or lat,lon; says full blend or grid only. | Read-only |
| receipts | How often our settle value matched the venue's result, with every miss. No prices. | Read-only |
| search | Search places by name, City, ST, airport code or lat,lon. Returns {results: [{id, title, url, text}]}; pass an id to fetch. | Read-only |
| sources | Open sources groundhog uses: licence, latest run, age, status. | Read-only |
Change history
- Listed (registry)
| Source | Listing | First seen | Last seen | Versions |
|---|---|---|---|---|
| Official MCP Registry | markets.groundhog/weather | 28 Oct 2026 | 28 Oct 2026 | 1 |