What is openephemeris-MCP?
openephemeris-MCP is a MCP server by openephemeris that astrology from the NASA JPL DE440 ephemeris: natal, synastry, progressions, transit search, Human Design, Vedic, BaZi and astrocartography. It is listed under Other and has 5 GitHub stars.
| Type | Mcp server |
|---|---|
| Author | openephemeris |
| Repository | openephemeris/openephemeris-MCP |
| Popularity | 5 GitHub stars |
| Category | Other |
| Security | Low risk (100/100) |
| Rank | #2,250 of 4,418 MCP servers; #330 in Other |
| License | MIT |
| Last commit | 2026-09-30 |
| Runs | Locally |
| Language | TypeScript |
| Platforms | macOS, Windows, Linux |
Is openephemeris-MCP safe to install?
openephemeris-MCP scores 100/100 on the MCPMods security check: Low risk. No checks raised a concern. It passed 6 of 6 checks.
MCP server results come from listing signals: who publishes it, where your data goes and what it can do. The code itself is not scanned yet.
| Check | Result |
|---|---|
| Published by the service itself | Pass |
| Runs on your machine only | Pass |
| No credentials mentioned | Pass |
| Read-only by description | Pass |
| No code execution | Pass |
| Source on GitHub | Pass |
How do I install openephemeris-MCP?
- Find the launch command. The README says how the server starts (npx, uvx, docker or a remote URL) and which API keys it needs.
https://github.com/openephemeris/openephemeris-MCP
- Add it to Claude Code. Replace the part after -- with the command from the README. Remote servers use --transport http with a URL.
claude mcp add openephemeris-mcp -- <command from README> claude mcp add --transport http openephemeris-mcp <server-url>
- Check it connected. This lists your MCP servers and their status.
claude mcp list
Or ask Claude to set it up
Paste this into Claude Code and it installs openephemeris-MCP for you:
Add the "openephemeris-MCP" MCP server from https://github.com/openephemeris/openephemeris-MCP to Claude Code. Read its README for the launch command and any API keys I need, run claude mcp add, then check that it connects.