# Stellarhound — stargazing forecasts, dark-sky sites & aurora (remote · stellarhound.com)

Live stargazing forecasts: per-night sky scores, dark-sky sites, aurora & light pollution anywhere.

- Trust score: 65/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-20

## Components

- remote · `stellarhound.com`: 65/100 (this document), [markdown](https://verifymcp.io/servers/com-stellarhound-stellarhound-mcp/stellarhound.md), [page](https://verifymcp.io/servers/com-stellarhound-stellarhound-mcp/stellarhound)

## Channel facts

- Endpoint: `https://stellarhound.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.1.0`

## Trust breakdown

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. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-20.

- **Endpoint Security**: 74/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 67/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 1295 tokens (~259/item across 5 items; 5 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 3/100
  - Stability observed for 1 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 67/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 0% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http com-stellarhound-stellarhound-mcp https://stellarhound.com/mcp
```

### Codex

```toml
[mcp_servers.com-stellarhound-stellarhound-mcp]
url = "https://stellarhound.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-stellarhound-stellarhound-mcp": {
      "type": "remote",
      "url": "https://stellarhound.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-stellarhound-stellarhound-mcp --url https://stellarhound.com/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-stellarhound-stellarhound-mcp:
    url: "https://stellarhound.com/mcp"
```

### Other

```json
{
  "mcpServers": {
    "com-stellarhound-stellarhound-mcp": {
      "type": "http",
      "url": "https://stellarhound.com/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-20 (score 65, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-08-19 (score 65)

First indexed and scored.

## MCP tools (5)

### `get_stargazing_conditions` (~267 tokens)

Score the next nights for stargazing at a location (0-100 per night).

    Use for "when should I stargaze this week near X", "is Saturday any good
    for the Milky Way", trip planning. Each night combines the three-layer
    cloud-cover forecast, moon illumination and up-fraction, and the
    astronomical-darkness window; `best_window` names the best upcoming night.
    Also returns the location's light-pollution estimate (approximate Bortle
    class + what's visible at that darkness).

    Args:
        lat: Latitude in decimal degrees (-90..90). You know city coordinates — pass them.
        lon: Longitude in decimal degrees (-180..180).
        nights: How many nights ahead to score, 1-16 (default 7; forecasts
            beyond ~7 nights are increasingly uncertain).

    Returns {timezone, light_pollution, nights:[{date, darkness, moon, cloud,
    score:{value, band, summary}}], best_window, uncertainty_note, attribution}.
    Present scores/verdicts verbatim; skies beyond ~7 days are provisional.

Input parameters:

- `lat` (number, required)
- `lon` (number, required)
- `nights` (integer)

### `get_tonight_agenda` (~153 tokens)

Get tonight's stargazing plan for a location: score, darkness window, and what to observe.

    Use when the user asks "what can I see tonight" / "is tonight worth going
    out". Returns tonight's sky score and darkness window plus a ranked agenda
    of observing targets appropriate for the location's sky darkness.

    Args:
        lat: Latitude in decimal degrees (-90..90).
        lon: Longitude in decimal degrees (-180..180).

    Returns {timezone, light_pollution, tonight:{date, darkness, weather,...},
    targets/agenda entries, attribution}. Report as returned.

Input parameters:

- `lat` (number, required)
- `lon` (number, required)

### `find_dark_sky_sites` (~236 tokens)

Recommend dark-sky sites near a location, ranked by whether the drive is worth it.

    Use for "where should I drive to stargaze near X". Sites are grouped by
    drivability (how far), then ranked by a drive-worth score combining the
    best weather window over the next 7 nights, how much darker the site is
    than the user's location, and drive time. Drive times are approximate
    (straight-line x 1.3), not routed.

    Args:
        lat: Latitude in decimal degrees (-90..90).
        lon: Longitude in decimal degrees (-180..180).
        limit: Max sites to return, 1-12 (default 5).

    Returns {ranking (methodology note), tiers:[{tier, label, hint, sites:[...]}],
    nearest_km, uncertainty_note, attribution} — sites grouped into drivability
    tiers. Include the methodology note when presenting — it explains the
    ordering honestly.

Input parameters:

- `lat` (number, required)
- `limit` (integer)
- `lon` (number, required)

### `get_aurora_forecast` (~164 tokens)

Get the aurora (northern/southern lights) outlook for a location.

    Use for "any chance of aurora tonight near X". Combines the Kp-index
    forecast with the location's geomagnetic latitude to say whether aurora
    could be visible there, and when.

    Args:
        lat: Latitude in decimal degrees (-90..90).
        lon: Longitude in decimal degrees (-180..180).

    Returns {kp_forecast:[{time, kp, flag: observed|estimated|predicted}, ...],
    visibility assessment fields, attribution}. Kp entries are flagged by how
    firm they are — keep those labels when presenting.

Input parameters:

- `lat` (number, required)
- `lon` (number, required)

### `get_light_pollution` (~192 tokens)

Estimate light pollution at any point: approximate Bortle class and what's visible there.

    Use for "how dark is the sky at X" / "can I see the Milky Way from X".
    Returns the zenith-brightness-derived estimate (mpsas, approximate Bortle
    class) and a plain-language ceiling: what the Milky Way, naked-eye and
    telescope views are like under that sky. This is a satellite-data estimate,
    not a field measurement — say so.

    Args:
        lat: Latitude in decimal degrees (-90..90).
        lon: Longitude in decimal degrees (-180..180).

    Returns {light_pollution:{bortle_approx, mpsas, ceiling:{label, milky_way,
    naked_eye, telescope}, note}, attribution}.

Input parameters:

- `lat` (number, required)
- `lon` (number, required)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-stellarhound-stellarhound-mcp/stellarhound#diagnostics

## Score history

- 2026-08-20: 65
- 2026-08-19: 65

## Links

- Remote endpoint: https://stellarhound.com/mcp
- Website: https://stellarhound.com/
- Changelog RSS feed: https://verifymcp.io/servers/com-stellarhound-stellarhound-mcp/stellarhound.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-stellarhound-stellarhound-mcp/stellarhound.json
- HTML version of this page: https://verifymcp.io/servers/com-stellarhound-stellarhound-mcp/stellarhound