groundhog.markets
REMOTE · GROUNDHOG.MARKETS
groundhog.markets: free weather forecasts in one call, plus Kalshi and Polymarket market rules.
Available components
Last scanned (8 hours ago)
Scores higher than 60% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Maps and Location
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security80
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability53
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 1384 tokens (~173/item across 8 items; 8 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management27
- Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage94
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 82% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 8 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 9 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 5 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.
- 3 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.
- 1 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.
- 30 Oct 26 +1
- Tool “markets” rewrote its description, which is the text the model reads security
- 29 Oct 26 0
- Stability: unverified → 0.03 ▲ functional
- 28 Oct 26 69
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Probed https://groundhog.markets/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_256_GCM_SHA384 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=groundhog.markets | CN=YR2,O=Let's Encrypt,C=US | 23 Oct 2026 | 21 Jan 2027 | RSA 2048 | SHA256-RSA | 676e0dc34816ec0ddd97f02ab72a9043d80 |
| SANs: groundhog.markets | ||||||
| CN=YR2,O=Let's Encrypt,C=US (CA) | CN=Root YR,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | RSA 2048 | SHA256-RSA | 4ebd24947e24d394802d84a52fd5b319 |
| CN=Root YR,O=ISRG,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | RSA 4096 | SHA256-RSA | f24b6d17f9d9ad7cb1c9fea78782699f |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of groundhog.markets. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| markets. | present | 58144, 64757 | 8, 8 | Verified |
| groundhog.markets. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=300 |
| x-content-type-options | nosniff |
| x-frame-options | DENY |
| referrer-policy | same-origin |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://groundhog.markets/mcp | Verified | 200 | |
| http (plaintext) | http://groundhog.markets/mcp | HTTPS enforced | 301 | https://groundhog.markets/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
fetch Fetch a place ~49
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.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | – |
No output schema declared.
No examples provided.
forecast Forecast blend ~467
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.
| Name | Type | Req | Description |
|---|---|---|---|
| all | boolean | – | table: also twin and stale rows |
| credits | string | – | – |
| date | string | – | today | tomorrow | +N (0-7) | YYYY-MM-DD, each place's local date. Default: today before 15:00 local, else tomorrow. |
| days | integer | – | week/table days (default 7) |
| format | string | – | line md, others tsv |
| hours | integer | – | series hours (72) |
| include_6h | boolean | – | temp only: also count 6-hourly (~) days |
| place | – | yes | Slug, name, 'City, ST', 'City, Country', ICAO or 'lat,lon'. An array (up to 10) for line/week. |
| runs | integer | – | size=runs: newest runs per source (1) |
| size | string | – | default line; runs = each source's newest runs by day (trading fields) |
| step | integer | – | series step hours (temp 3, rain 6) |
| stn | string | – | rain: a settle station of the place, e.g. KORD |
| units | string | – | default F in the US, else C; rain in inches with F, mm with C |
| variable | string | – | temp (default) or rain |
| win | string | – | rain: lst = the climate day at a daily-rain settle station, cal = calendar day |
No output schema declared.
No examples provided.
history As-issued history ~414
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.
| Name | Type | Req | Description |
|---|---|---|---|
| asof | string | – | newest run fetched by this UTC time (no look-ahead) |
| cycle | integer | – | with lead: only runs at H UTC |
| els | string | – | kind=nbm: elements, comma list (TXN,XND,P12,Q12,TMP) |
| format | string | – | tsv (default) | json |
| from | string | yes | first target date YYYY-MM-DD |
| kind | string | – | daily (default) | nbm | obs |
| lead | integer | – | the run issued N UTC days before each date |
| place | string | – | slug, name or ICAO (kind=daily; nbm/obs: its station) |
| prod | string | – | kind=nbm: nbe (default) | nbs |
| product | string | – | kind=obs |
| run | string | – | one run, YYYY-MM-DDTHH:MMZ |
| source | string | – | kind=daily: source ids, comma list (e.g. nbm,gfs,ifs) |
| stn | string | – | ICAO (kind=nbm, obs) |
| to | string | – | last target date (default from) |
| view | string | – | kind=nbm: raw (default) | day |
No output schema declared.
No examples provided.
markets Weather markets ~206
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 ≈526 tok, table ≈1,757; every city ≈36,291. With neither: the list of market cities.
| Name | Type | Req | Description |
|---|---|---|---|
| credits | string | – | – |
| date | string | – | today | tomorrow | yesterday | YYYY-MM-DD, each place's local date (default today) |
| family | string | – | high | low | rain | all (default all); alone: every market city |
| format | string | – | line md, table tsv |
| place | – | – | Slug, name, 'City, ST' or ICAO; an array for up to 10 places |
| size | string | – | line (default with place) | table (default without) |
No output schema declared.
No examples provided.
places Find a place ~46
Find a place slug by name, City, ST, airport code or lat,lon; says full blend or grid only.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | – |
| q | string | yes | – |
No output schema declared.
No examples provided.
receipts Market receipts ~61
How often our settle value matched the venue's result, with every miss. No prices.
| Name | Type | Req | Description |
|---|---|---|---|
| days | integer | – | last N days (30) |
| family | string | – | – |
| format | string | – | default tsv |
| venue | string | – | – |
No output schema declared.
No examples provided.
search Search places ~50
Search places by name, City, ST, airport code or lat,lon. Returns {results: [{id, title, url, text}]}; pass an id to fetch.
| Name | Type | Req | Description |
|---|---|---|---|
| query | string | yes | – |
No output schema declared.
No examples provided.
sources Sources ~22
Open sources groundhog uses: licence, latest run, age, status.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
How do I install the groundhog.markets MCP server?
groundhog.markets is a hosted endpoint at https://groundhog.markets/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · groundhog.markets
claude mcp add --transport http markets-groundhog-weather 'https://groundhog.markets/mcp'
What is the groundhog.markets MCP server?
groundhog.markets is an MCP server listed in the public MCP registry as markets.groundhog/weather. groundhog.markets: free weather forecasts in one call, plus Kalshi and Polymarket market rules. This page covers its hosted endpoint (https://groundhog.markets/mcp).
Is the groundhog.markets MCP server safe to use?
groundhog.markets scores 73 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the groundhog.markets MCP server expose?
groundhog.markets exposes 8 tools: forecast, places, sources, markets, receipts, and 3 more. Their descriptions and schemas cost roughly 1,315 tokens of context every time the server is loaded.
Does the groundhog.markets MCP server require authentication?
No. We connected to groundhog.markets without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the groundhog.markets MCP server still maintained?
groundhog.markets is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.