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Stellarhound MCP server

Which servers in the official MCP registry are Stellarhound's own, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-20

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Whose server it is
  • Registry namecom.stellarhound/stellarhound-mcpverified in the MCP registry

The registry name sits under stellarhound.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-20
  • Stateanswerschecked 2026-10-20
  • Tools5
  • Server calls itselfstellarhound
  • Server version1.29.0
  • Protocol version2025-06-18

On 2026-10-20 the server answered initialize and tools/list without a sign-in. First answer in 185 ms.

Should an agent connect itNot proven either way yet
  • Its tools do every use case we checked: check cloud and moon scores for the coming nights; find nearby dark sky sites within driving distance.
  • Checked on 3 of the 7 days it takes to judge reliability.

Once connected

  • For "check cloud and moon scores for the coming nights", the likely first call is get_stargazing_conditions.
  • For "find nearby dark sky sites within driving distance", the likely first call is find_dark_sky_sites.
  • Parameters are untyped or undescribed in 5 of 5 tools: check arguments before calling.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 3, the first on 2026-10-20
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 3 so far
  • What an agent can do with it2 of 2 use cases
  • Answeredmeasuring3 of the 7 daily checks it takes to print a share
  • Median first answer404 ms
  • Space in an agent's context≈ 1,285 tokensthe definitions of all its tools (5), which an agent carries on every turn
  • Tool definitionsB · 83 of 100
  • Typed results0 of 5 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 5 of 5

What an agent can do with it

  • can do · check cloud and moon scores for the coming nights
  • can do · find nearby dark sky sites within driving distance
  • not sure · time a meteor shower viewing around moonset

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (30%), doing the product's job (25%), definitions (20%), context (10%) and use (15%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers5 tools · read 2026-10-20
  • get_stargazing_conditions

    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…

  • get_tonight_agenda

    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…

  • find_dark_sky_sites

    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…

  • get_aurora_forecast

    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…

  • get_light_pollution

    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…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

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

Add it

Claude Code, in a terminal

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

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://stellarhound.com/mcp as a custom connector in the settings.

OpenAPI spec

12 paths, read 2026-10-20. Open the spec ↗

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.