SERVER

astronomy-mcp-server

Rank #4,360

io.github.cyanheads/astronomy-mcp-server

Offline observational astronomy: positions, rise/set, moon phases, eclipses, and seasons.

18 versions

3 GitHub stars

by cyanheads (165 servers)View repository ↗

First listed

Jun 26, 2026

Last publish date

Oct 15, 2026

PURPOSE

What you can do with astronomy-mcp-server

astronomy-mcp-server is a Model Context Protocol (MCP) server published by cyanheads. It ranks #4,360 of 151,203 active servers on MCP Toplist, and its repository has 3 GitHub stars. astronomy-mcp-server is listed across 4 registries — Official MCP, PulseMCP, Smithery and Glama, with 18 tracked versions. It was first listed on Jun 26, 2026 and most recently updated on Oct 15, 2026.

Not verifiedMCP Toplist has not yet written a checked profile for this server, so the paragraph above is assembled from registry data only. The repository README is the authority on what it does.

CAPABILITIES AND LIMITATIONS

What astronomy-mcp-server can and cannot do

Not verifiedMCP Toplist has not catalogued this server's tools or limitations. The repository README lists them.

REQUIREMENTS

What you need before using astronomy-mcp-server

DeclaredNo credentialsNo credentials declared

The registry listing declares no required environment variables or authentication. This is declared metadata, not a verified install — the repository README is the authority.

MCP Toplist probed the public endpoint on Oct 15, 2026 and could not complete the MCP handshake (jsonrpc error). Requirements remain unverified.

Declared by Glama, last synced Oct 23, 2026. Not independently verified by MCP Toplist.

Declared in the registry install config

MCP_LOG_LEVEL · optional
ASTRONOMY_ENABLE_HORIZONS · optional
ASTRONOMY_ENABLE_SATELLITES · optional
ASTRONOMY_DEFAULT_TIMEZONE · optional
MCP_TRANSPORT_TYPE · optional
MCP_HTTP_HOST · optional
MCP_HTTP_PORT · optional
MCP_HTTP_ENDPOINT_PATH · optional
MCP_AUTH_MODE · optional

Hosted endpoint declared as public.

INSTALLATION AND FIRST TASK

Connect astronomy-mcp-server and confirm it works

Remote · HTTP

claude mcp add --transport http astronomy-mcp-server https://astronomy.caseyjhand.com/mcp

npm package

claude mcp add astronomy-mcp-server -e "MCP_LOG_LEVEL=<your MCP_LOG_LEVEL>" -e "ASTRONOMY_ENABLE_HORIZONS=<your ASTRONOMY_ENABLE_HORIZONS>" -e "ASTRONOMY_ENABLE_SATELLITES=<your ASTRONOMY_ENABLE_SATELLITES>" -e "ASTRONOMY_DEFAULT_TIMEZONE=<your ASTRONOMY_DEFAULT_TIMEZONE>" -- npx -y @cyanheads/astronomy-mcp-server

Replace each placeholder with your own value before saving.

npm package

claude mcp add astronomy-mcp-server -e "MCP_TRANSPORT_TYPE=<your MCP_TRANSPORT_TYPE>" -e "MCP_HTTP_HOST=<your MCP_HTTP_HOST>" -e "MCP_HTTP_PORT=<your MCP_HTTP_PORT>" -e "MCP_HTTP_ENDPOINT_PATH=<your MCP_HTTP_ENDPOINT_PATH>" -e "MCP_AUTH_MODE=<your MCP_AUTH_MODE>" -e "MCP_LOG_LEVEL=<your MCP_LOG_LEVEL>" -e "ASTRONOMY_ENABLE_HORIZONS=<your ASTRONOMY_ENABLE_HORIZONS>" -e "ASTRONOMY_ENABLE_SATELLITES=<your ASTRONOMY_ENABLE_SATELLITES>" -e "ASTRONOMY_DEFAULT_TIMEZONE=<your ASTRONOMY_DEFAULT_TIMEZONE>" -- npx -y @cyanheads/astronomy-mcp-server

Replace each placeholder with your own value before saving.

Remote · HTTP

[mcp_servers.astronomy-mcp-server]
url = "https://astronomy.caseyjhand.com/mcp"

Add to ~/.codex/config.toml.

npm package

[mcp_servers.astronomy-mcp-server]
command = "npx"
args = ["-y", "@cyanheads/astronomy-mcp-server"]

[mcp_servers.astronomy-mcp-server.env]
MCP_LOG_LEVEL = "<your MCP_LOG_LEVEL>"
ASTRONOMY_ENABLE_HORIZONS = "<your ASTRONOMY_ENABLE_HORIZONS>"
ASTRONOMY_ENABLE_SATELLITES = "<your ASTRONOMY_ENABLE_SATELLITES>"
ASTRONOMY_DEFAULT_TIMEZONE = "<your ASTRONOMY_DEFAULT_TIMEZONE>"

Add to ~/.codex/config.toml. Replace each placeholder with your own value before saving.

npm package

[mcp_servers.astronomy-mcp-server]
command = "npx"
args = ["-y", "@cyanheads/astronomy-mcp-server"]

[mcp_servers.astronomy-mcp-server.env]
MCP_TRANSPORT_TYPE = "<your MCP_TRANSPORT_TYPE>"
MCP_HTTP_HOST = "<your MCP_HTTP_HOST>"
MCP_HTTP_PORT = "<your MCP_HTTP_PORT>"
MCP_HTTP_ENDPOINT_PATH = "<your MCP_HTTP_ENDPOINT_PATH>"
MCP_AUTH_MODE = "<your MCP_AUTH_MODE>"
MCP_LOG_LEVEL = "<your MCP_LOG_LEVEL>"
ASTRONOMY_ENABLE_HORIZONS = "<your ASTRONOMY_ENABLE_HORIZONS>"
ASTRONOMY_ENABLE_SATELLITES = "<your ASTRONOMY_ENABLE_SATELLITES>"
ASTRONOMY_DEFAULT_TIMEZONE = "<your ASTRONOMY_DEFAULT_TIMEZONE>"

Add to ~/.codex/config.toml. Replace each placeholder with your own value before saving.

Remote · HTTP

https://astronomy.caseyjhand.com/mcp

Settings → Connectors → “Add custom connector”, then paste this URL.

npm package

{
  "mcpServers": {
    "astronomy-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/astronomy-mcp-server"
      ],
      "env": {
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>",
        "ASTRONOMY_ENABLE_HORIZONS": "<your ASTRONOMY_ENABLE_HORIZONS>",
        "ASTRONOMY_ENABLE_SATELLITES": "<your ASTRONOMY_ENABLE_SATELLITES>",
        "ASTRONOMY_DEFAULT_TIMEZONE": "<your ASTRONOMY_DEFAULT_TIMEZONE>"
      }
    }
  }
}

Add to claude_desktop_config.json (Settings → Developer → Edit Config). Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "astronomy-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/astronomy-mcp-server"
      ],
      "env": {
        "MCP_TRANSPORT_TYPE": "<your MCP_TRANSPORT_TYPE>",
        "MCP_HTTP_HOST": "<your MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<your MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<your MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<your MCP_AUTH_MODE>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>",
        "ASTRONOMY_ENABLE_HORIZONS": "<your ASTRONOMY_ENABLE_HORIZONS>",
        "ASTRONOMY_ENABLE_SATELLITES": "<your ASTRONOMY_ENABLE_SATELLITES>",
        "ASTRONOMY_DEFAULT_TIMEZONE": "<your ASTRONOMY_DEFAULT_TIMEZONE>"
      }
    }
  }
}

Add to claude_desktop_config.json (Settings → Developer → Edit Config). Replace each placeholder with your own value before saving.

Remote · HTTP

{
  "mcpServers": {
    "astronomy-mcp-server": {
      "url": "https://astronomy.caseyjhand.com/mcp"
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project).

npm package

{
  "mcpServers": {
    "astronomy-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/astronomy-mcp-server"
      ],
      "env": {
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>",
        "ASTRONOMY_ENABLE_HORIZONS": "<your ASTRONOMY_ENABLE_HORIZONS>",
        "ASTRONOMY_ENABLE_SATELLITES": "<your ASTRONOMY_ENABLE_SATELLITES>",
        "ASTRONOMY_DEFAULT_TIMEZONE": "<your ASTRONOMY_DEFAULT_TIMEZONE>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project). Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "astronomy-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/astronomy-mcp-server"
      ],
      "env": {
        "MCP_TRANSPORT_TYPE": "<your MCP_TRANSPORT_TYPE>",
        "MCP_HTTP_HOST": "<your MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<your MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<your MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<your MCP_AUTH_MODE>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>",
        "ASTRONOMY_ENABLE_HORIZONS": "<your ASTRONOMY_ENABLE_HORIZONS>",
        "ASTRONOMY_ENABLE_SATELLITES": "<your ASTRONOMY_ENABLE_SATELLITES>",
        "ASTRONOMY_DEFAULT_TIMEZONE": "<your ASTRONOMY_DEFAULT_TIMEZONE>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project). Replace each placeholder with your own value before saving.

Remote · HTTP

{
  "servers": {
    "astronomy-mcp-server": {
      "type": "http",
      "url": "https://astronomy.caseyjhand.com/mcp"
    }
  }
}

Save as .vscode/mcp.json in your workspace.

npm package

{
  "servers": {
    "astronomy-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/astronomy-mcp-server"
      ],
      "env": {
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>",
        "ASTRONOMY_ENABLE_HORIZONS": "<your ASTRONOMY_ENABLE_HORIZONS>",
        "ASTRONOMY_ENABLE_SATELLITES": "<your ASTRONOMY_ENABLE_SATELLITES>",
        "ASTRONOMY_DEFAULT_TIMEZONE": "<your ASTRONOMY_DEFAULT_TIMEZONE>"
      }
    }
  }
}

Save as .vscode/mcp.json in your workspace. Replace each placeholder with your own value before saving.

npm package

{
  "servers": {
    "astronomy-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/astronomy-mcp-server"
      ],
      "env": {
        "MCP_TRANSPORT_TYPE": "<your MCP_TRANSPORT_TYPE>",
        "MCP_HTTP_HOST": "<your MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<your MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<your MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<your MCP_AUTH_MODE>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>",
        "ASTRONOMY_ENABLE_HORIZONS": "<your ASTRONOMY_ENABLE_HORIZONS>",
        "ASTRONOMY_ENABLE_SATELLITES": "<your ASTRONOMY_ENABLE_SATELLITES>",
        "ASTRONOMY_DEFAULT_TIMEZONE": "<your ASTRONOMY_DEFAULT_TIMEZONE>"
      }
    }
  }
}

Save as .vscode/mcp.json in your workspace. Replace each placeholder with your own value before saving.

Remote · HTTP

{
  "mcpServers": {
    "astronomy-mcp-server": {
      "serverUrl": "https://astronomy.caseyjhand.com/mcp"
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

npm package

{
  "mcpServers": {
    "astronomy-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/astronomy-mcp-server"
      ],
      "env": {
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>",
        "ASTRONOMY_ENABLE_HORIZONS": "<your ASTRONOMY_ENABLE_HORIZONS>",
        "ASTRONOMY_ENABLE_SATELLITES": "<your ASTRONOMY_ENABLE_SATELLITES>",
        "ASTRONOMY_DEFAULT_TIMEZONE": "<your ASTRONOMY_DEFAULT_TIMEZONE>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json. Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "astronomy-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/astronomy-mcp-server"
      ],
      "env": {
        "MCP_TRANSPORT_TYPE": "<your MCP_TRANSPORT_TYPE>",
        "MCP_HTTP_HOST": "<your MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<your MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<your MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<your MCP_AUTH_MODE>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>",
        "ASTRONOMY_ENABLE_HORIZONS": "<your ASTRONOMY_ENABLE_HORIZONS>",
        "ASTRONOMY_ENABLE_SATELLITES": "<your ASTRONOMY_ENABLE_SATELLITES>",
        "ASTRONOMY_DEFAULT_TIMEZONE": "<your ASTRONOMY_DEFAULT_TIMEZONE>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json. Replace each placeholder with your own value before saving.

Remote · HTTP

{
  "mcpServers": {
    "astronomy-mcp-server": {
      "url": "https://astronomy.caseyjhand.com/mcp"
    }
  }
}

npm package

{
  "mcpServers": {
    "astronomy-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/astronomy-mcp-server"
      ],
      "env": {
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>",
        "ASTRONOMY_ENABLE_HORIZONS": "<your ASTRONOMY_ENABLE_HORIZONS>",
        "ASTRONOMY_ENABLE_SATELLITES": "<your ASTRONOMY_ENABLE_SATELLITES>",
        "ASTRONOMY_DEFAULT_TIMEZONE": "<your ASTRONOMY_DEFAULT_TIMEZONE>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "astronomy-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/astronomy-mcp-server"
      ],
      "env": {
        "MCP_TRANSPORT_TYPE": "<your MCP_TRANSPORT_TYPE>",
        "MCP_HTTP_HOST": "<your MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<your MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<your MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<your MCP_AUTH_MODE>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>",
        "ASTRONOMY_ENABLE_HORIZONS": "<your ASTRONOMY_ENABLE_HORIZONS>",
        "ASTRONOMY_ENABLE_SATELLITES": "<your ASTRONOMY_ENABLE_SATELLITES>",
        "ASTRONOMY_DEFAULT_TIMEZONE": "<your ASTRONOMY_DEFAULT_TIMEZONE>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

First successful task

After adding the config, ask your client to list this server's tools. A tool list confirms the connection; an empty list or an error means the server did not start or needs credentials.

ALTERNATIVES

When to choose another server

Other servers by cyanheads

View all cyanheads servers →

No task-specific alternatives are catalogued for astronomy-mcp-serveryet; the list above is its publisher's other servers.

MAINTENANCE AND EVIDENCE

What changed, and when this was checked

First listed: Jun 26, 2026
Latest version published: Oct 15, 2026
Version history: 18 versions tracked (below)
Requirements evidence: MCP Toplist probed the public endpoint on Oct 15, 2026 and could not complete the MCP handshake (jsonrpc error). Requirements remain unverified.
Profile checked: Not yet — purpose, capabilities and requirements above come from registry data only
Ranking data as of: Oct 23, 2026

Registry sightings

PulseMCP ↗listed since Jul 5, 2026 · still listed
Smithery ↗listed since Jul 11, 2026 · delisted, last seen Aug 25, 2026
Official MCP ↗listed since Jul 24, 2026 · still listed
Glama ↗listed since Jul 31, 2026 · still listed

Do you maintain astronomy-mcp-server? to correct or enrich this profile.

VERSIONS

Available versions (18)

Version	Published
0.4.2	Oct 15, 2026
0.4.1	Oct 8, 2026
0.4.0	Sep 24, 2026
0.3.1	Sep 24, 2026
0.3.0	Sep 24, 2026
0.2.10	Sep 19, 2026
0.2.9	Aug 25, 2026
0.2.8	Aug 18, 2026
0.2.7	Aug 18, 2026
0.2.6	Aug 18, 2026
0.2.5	Aug 18, 2026
0.2.4	Aug 18, 2026
0.2.3	Jul 31, 2026
0.2.2	Jul 31, 2026
0.2.1	Jul 30, 2026
0.2.0	Jul 30, 2026
0.1.3	Jun 28, 2026
0.1.2	Jun 28, 2026

STANDING

#4,360of 151,203 active serversTop 5%

Ranks ahead of 146,843 of 151,203 servers on MCP Toplist.

BADGE

Show your rank

Maintain this server? Add the live rank badge to your README — it updates automatically as the leaderboard changes.

Markdown

[![MCP Toplist](https://mcptoplist.com/badge/io.github.cyanheads%2Fastronomy-mcp-server.svg)](https://mcptoplist.com/server/io.github.cyanheads%2Fastronomy-mcp-server)

HTML

<a href="https://mcptoplist.com/server/io.github.cyanheads%2Fastronomy-mcp-server"><img src="https://mcptoplist.com/badge/io.github.cyanheads%2Fastronomy-mcp-server.svg" alt="MCP Toplist: Top 5% of 151,203" /></a>

Variants: append ?metric=score or ?metric=stars to the image URL.

FAQ

Frequently asked questions

Who maintains astronomy-mcp-server?: astronomy-mcp-server is maintained by cyanheads, which publishes 165 MCP servers (2813 total versions) tracked on MCP Toplist.
Is astronomy-mcp-server listed on the Official MCP Registry?: Yes — astronomy-mcp-server is listed on the Official MCP Registry, alongside PulseMCP, Smithery and Glama.
How many versions does astronomy-mcp-server have?: MCP Toplist tracks 18 versions of astronomy-mcp-server, most recently published on Oct 15, 2026.
Where can I find the source code for astronomy-mcp-server?: The source code for astronomy-mcp-server is hosted at github.com/cyanheads/astronomy-mcp-server.

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