Precision-audited astrology MCP: natal charts, transits, synastry, moon phases. No API key.
Connect Runs on your machine
claude mcp add astral-mcp -e ASTRAL_MCP_TRANSPORT=<ASTRAL_MCP_TRANSPORT> -e ASTRAL_MCP_HOST=<ASTRAL_MCP_HOST> -e ASTRAL_MCP_PORT=<ASTRAL_MCP_PORT> -e ASTRAL_MCP_ALLOWED_ORIGIN=<ASTRAL_MCP_ALLOWED_ORIGIN> -- npx -y [email protected]{
"mcpServers": {
"astral-mcp": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"ASTRAL_MCP_TRANSPORT": "<ASTRAL_MCP_TRANSPORT>",
"ASTRAL_MCP_HOST": "<ASTRAL_MCP_HOST>",
"ASTRAL_MCP_PORT": "<ASTRAL_MCP_PORT>",
"ASTRAL_MCP_ALLOWED_ORIGIN": "<ASTRAL_MCP_ALLOWED_ORIGIN>"
}
}
}
}{
"mcpServers": {
"astral-mcp": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"ASTRAL_MCP_TRANSPORT": "<ASTRAL_MCP_TRANSPORT>",
"ASTRAL_MCP_HOST": "<ASTRAL_MCP_HOST>",
"ASTRAL_MCP_PORT": "<ASTRAL_MCP_PORT>",
"ASTRAL_MCP_ALLOWED_ORIGIN": "<ASTRAL_MCP_ALLOWED_ORIGIN>"
}
}
}
}{
"servers": {
"astral-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"ASTRAL_MCP_TRANSPORT": "<ASTRAL_MCP_TRANSPORT>",
"ASTRAL_MCP_HOST": "<ASTRAL_MCP_HOST>",
"ASTRAL_MCP_PORT": "<ASTRAL_MCP_PORT>",
"ASTRAL_MCP_ALLOWED_ORIGIN": "<ASTRAL_MCP_ALLOWED_ORIGIN>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
ASTRAL_MCP_TRANSPORTOptional | Transport to run. Defaults to stdio. Set to http to expose a streamable HTTP endpoint instead. |
ASTRAL_MCP_HOSTOptional | Host to bind when ASTRAL_MCP_TRANSPORT=http. Defaults to 127.0.0.1. |
ASTRAL_MCP_PORTOptional | Port to bind when ASTRAL_MCP_TRANSPORT=http. Defaults to 3000. |
ASTRAL_MCP_ALLOWED_ORIGINOptional | Allowed CORS origin for the HTTP transport. Defaults to the bound host:port. |
Details
| Package | [email protected] (NPM, stdio) |
| First published | 7 Jun 2026 |
| Last updated | 7 Jun 2026 |
| Registry name | io.github.davidmosiah/astral-mcp |
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