Open Ephemeris MCP server
{
"mcpServers": {
"open-ephemeris": {
"type": "http",
"url": "https://mcp.openephemeris.com/mcp"
}
}
}{
"mcpServers": {
"open-ephemeris": {
"type": "http",
"url": "https://mcp.openephemeris.com/mcp"
}
}
}{
"mcpServers": {
"open-ephemeris": {
"type": "http",
"url": "https://mcp.openephemeris.com/mcp"
}
}
}{
"servers": {
"open-ephemeris": {
"type": "http",
"url": "https://mcp.openephemeris.com/mcp"
}
}
}{
"mcpServers": {
"open-ephemeris": {
"type": "http",
"url": "https://mcp.openephemeris.com/mcp"
}
}
}file .mcp.json (in your project root)file claude_desktop_config.jsonfile ~/.cursor/mcp.jsonfile .vscode/mcp.jsonfile ~/.codeium/windsurf/mcp_config.jsonversion 4.15.1
What it does
An MCP server that provides astrological and astronomical calculations using NASA JPL DE440 ephemeris data. It covers 90 celestial bodies and 124 fixed stars across 1,100 years of data, supporting natal charts, transits, eclipses, and Human Design calculations. Useful for developers building astrology tools or integrating precise planetary position data into applications.
- Calculate a natal chart for a birth date, time, and location to get planetary positions and aspects.
- Check current planetary transits or upcoming eclipse events for a specific date and location.
- Retrieve precise positions of asteroids, trans-Neptunian objects, and fixed stars for custom astrological applications.
Tools this server exposes
| Tool | Does |
|---|---|
| ephemeris_natal_chart | Computes a natal chart with planetary positions for a given birth datetime and location. |
Before you enable it
An MCP server runs with whatever access you give it. Start with a development account rather than production, and check which tools the server exposes before you let an agent call them unattended.