Koskamo

Lunonis Astrology MCP

This official MCP server provides read-only access to Lunonis's in-house astrology calculations. It allows AI agents to generate detailed natal charts (including Sun, Moon, Rising, planets, and aspects), search for birth places to resolve ambiguities, and calculate synastry compatibility between two individuals. The server is public, requires no authentication, and stores no user data.

Visit Lunonis

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Lunonis Astrology MCP logo, by LunonisVendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-01Operated by Lunonis
MCP endpoint (Streamable HTTP)
https://lunonis.com/mcp
Vendor documentation

What you can do with it

  • Generate a full natal chart with planetary positions and aspects
  • Search for birth cities to disambiguate location inputs
  • Calculate synastry compatibility between two people's charts

Source and maintenance

Vendor evidenceRegistry 1.0.0
mcp-registry: com.lunonis/astrology@1.0.0Project website

Protocol and capabilities

Server
lunonis 1.0.0
MCP protocol
2025-06-18
Tools
3 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": true
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

Lunonis calculates real natal charts (tropical zodiac, Placidus houses) and synastry from a birth date, time and city. To get a chart ask the user for the birth date, the birth time if they know it, and the birth city, then call natal_chart. If a result has status "ambiguous_place", show the candidates, ask which one and call again with that candidate's id as place. Use only the values returned; never invent or recompute placements. Without a birth time there is no rising sign or houses: say so. Present astrology as reflection, not prediction or advice. Give the user the returned links.

Tools

3 advertised

natal_chart — Natal chart
Advertised by the server during the last successful anonymous check.
Advertised read-only

Calculate a real natal (birth) chart from a birth date, optional birth time and a city. Returns the Sun, Moon and rising signs, every planet with sign, degree and house, the five tightest aspects, an element and modality summary, and a link to the free full chart with the wheel on lunonis.com. Calculated in-house with an ephemeris (tropical zodiac, Placidus houses); nothing is stored. If the city name matches several places it returns status "ambiguous_place" with candidates: ask the user which one, then call again with that id as place.

natal_chart input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "date",
    "place"
  ],
  "properties": {
    "date": {
      "type": "string",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "description": "Birth date, YYYY-MM-DD (1900-2100)"
    },
    "lang": {
      "enum": [
        "en",
        "es",
        "pt",
        "fr",
        "de",
        "it",
        "pl",
        "tr",
        "ja",
        "zh",
        "uk"
      ],
      "type": "string",
      "description": "Language of the returned links (site language code). Default en."
    },
    "time": {
      "type": "string",
      "pattern": "^([01]\\d|2[0-3]):[0-5]\\d$",
      "description": "Birth time, 24-hour HH:MM local time. Omit if unknown: the rising sign and houses are then left out, never guessed."
    },
    "place": {
      "type": "string",
      "maxLength": 80,
      "minLength": 1,
      "description": "Birth city name (e.g. \"Lviv\" or \"Lviv, Ukraine\"), or a place id from search_places. A name shared by several cities returns candidates to choose from."
    }
  }
}
natal_chart annotations
{
  "title": "Natal chart",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
search_places — Search places
Advertised by the server during the last successful anonymous check.
Advertised read-only

Find birth cities by name. Returns up to 6 candidates { id, name, region, country }, the biggest first. Use it to disambiguate a city, then pass the chosen id as the place of natal_chart or compatibility.

search_places input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "query"
  ],
  "properties": {
    "query": {
      "type": "string",
      "maxLength": 80,
      "minLength": 2,
      "description": "City name, at least 2 characters (e.g. \"Paris\")"
    }
  }
}
search_places annotations
{
  "title": "Search places",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
compatibility — Compatibility (synastry)
Advertised by the server during the last successful anonymous check.
Advertised read-only

Compare two people's charts (synastry) from their birth data. Returns the overall tone (flowing, mixed or charged), whether the Sun elements match, the classic pairings (Venus-Mars, Sun-Moon, Moon-Moon, Venus-Venus), the tightest Moon, Venus, Mars and Sun contacts between the two charts, and a link to the free full comparison on lunonis.com. Counted aspects only: there is no compatibility score. Nothing is stored.

compatibility input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "personA",
    "personB"
  ],
  "properties": {
    "personA": {
      "type": "object",
      "required": [
        "date",
        "place"
      ],
      "properties": {
        "date": {
          "type": "string",
          "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
          "description": "Birth date, YYYY-MM-DD (1900-2100)"
        },
        "time": {
          "type": "string",
          "pattern": "^([01]\\d|2[0-3]):[0-5]\\d$",
          "description": "Birth time, 24-hour HH:MM local time. Omit if unknown: the rising sign and houses are then left out, never guessed."
        },
        "place": {
          "type": "string",
          "maxLength": 80,
          "minLength": 1,
          "description": "Birth city name (e.g. \"Lviv\" or \"Lviv, Ukraine\"), or a place id from search_places. A name shared by several cities returns candidates to choose from."
        }
      },
      "description": "First person"
    },
    "personB": {
      "type": "object",
      "required": [
        "date",
        "place"
      ],
      "properties": {
        "date": {
          "type": "string",
          "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
          "description": "Birth date, YYYY-MM-DD (1900-2100)"
        },
        "time": {
          "type": "string",
          "pattern": "^([01]\\d|2[0-3]):[0-5]\\d$",
          "description": "Birth time, 24-hour HH:MM local time. Omit if unknown: the rising sign and houses are then left out, never guessed."
        },
        "place": {
          "type": "string",
          "maxLength": 80,
          "minLength": 1,
          "description": "Birth city name (e.g. \"Lviv\" or \"Lviv, Ukraine\"), or a place id from search_places. A name shared by several cities returns candidates to choose from."
        }
      },
      "description": "Second person"
    }
  }
}
compatibility annotations
{
  "title": "Compatibility (synastry)",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
1018 ms
95th percentile latency
1018 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 1018 ms · metadata changed · 3 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http lunonis-astrology-mcp https://lunonis.com/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add lunonis-astrology-mcp --url https://lunonis.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable lunonis-astrology-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "lunonis-astrology-mcp": {
      "url": "https://lunonis.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "lunonis-astrology-mcp": {
      "type": "streamableHttp",
      "url": "https://lunonis.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start lunonis-astrology-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "lunonis-astrology-mcp": {
      "type": "http",
      "url": "https://lunonis.com/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http lunonis-astrology-mcp https://lunonis.com/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.
Claude Desktop configuration
{
  "mcpServers": {
    "lunonis-astrology-mcp": {
      "url": "https://lunonis.com/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "lunonis-astrology-mcp": {
      "serverUrl": "https://lunonis.com/mcp"
    }
  }
}

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