What is the key difference between MCP Ephemeris and World Weather Online?

MCP Ephemeris belongs to the Aerospace & Astrodynamics category with local stdio execution, while World Weather Online belongs to the Aerospace & Astrodynamics category with cloud HTTP/SSE execution.

How do I install MCP Ephemeris or World Weather Online in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are MCP Ephemeris and World Weather Online free or paid?

MCP Ephemeris operates under a Free / Open Source model (No auth required). World Weather Online operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

MCP Ephemeris lists 19 tools with 0 views and 0 GitHub stars. World Weather Online lists 8 tools with 2 views and 1 GitHub stars.

Can I use both MCP Ephemeris and World Weather Online together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

MCP Ephemeris vs World Weather Online

In-depth architectural comparison of the MCP Ephemeris and World Weather Online MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

MCP Ephemeris

Aerospace & Astrodynamics · Local stdio

Quality: 53/100 (Good) | Auth: No auth required

World Weather Online

Aerospace & Astrodynamics · Remote HTTP/SSE

Quality: 47/100 (Fair) | Auth: No auth required

Verdict Summary: Choose MCP Ephemeris if you need specialized Aerospace & Astrodynamics tools running via a local process. Choose World Weather Online if your workspace requires Aerospace & Astrodynamics integration with remote web transport. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose MCP Ephemeris when:

You need dedicated capabilities in the Aerospace & Astrodynamics domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: get_planet_positions, get_moon_phase, get_current_sky.

Explore MCP Ephemeris Details

Choose World Weather Online when:

You need dedicated capabilities in the Aerospace & Astrodynamics domain.
You prefer remote streaming HTTP/SSE transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: get_weather, get_historical_weather, get_marine_weather.

Explore World Weather Online Details

Feature & Specification Comparison

Specification	MCP Ephemeris Aerospace & Astrodynamics	World Weather Online Aerospace & Astrodynamics
Summary
Category & Scope	Aerospace & Astrodynamics	Aerospace & Astrodynamics
Quality signal

Tools & Capabilities Breakdown

MCP Ephemeris Tools (19)

get_planet_positions

ecliptic positions of all bodies (sign, degree, retro)

get_moon_phase

moon phase, illumination %, description

get_current_sky

the sky right now (current transits) for a place

get_aspects

grid of major + minor aspects between bodies

get_natal_chart

full chart: houses, aspects, ASC/MC, moon phase, Hermetic Lots

get_transits

transit→natal aspects, sorted by orb

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

MCP Ephemeris Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "mcp-ephemeris": {
      "command": "npx",
      "args": [
        "-y",
        "@cosmosos/mcp-ephemeris"
      ]
    }
  }
}

World Weather Online Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "world-weather-online": {
      "url": "https://mcp.worldweatheronline.com/health"
    }
  }
}

Frequently Asked Questions

MCP Ephemeris is categorized under Aerospace & Astrodynamics and uses a local stdio subprocess. In contrast, World Weather Online belongs to Aerospace & Astrodynamics using remote streaming HTTP/SSE transport. Select MCP Ephemeris when you need capabilities focused on aerospace & astrodynamics and World Weather Online when you require tools for aerospace & astrodynamics.

More alternatives to MCP Ephemeris More alternatives to World Weather Online Aerospace & Astrodynamics category hub