Koskamo

TianJi Astrology MCP

An MCP server that enables AI agents to compute Swiss Ephemeris-grade natal charts, retrieve current planetary transits, and access zodiac sign profiles. It supports Western astrology, tarot, and BaZi with real-time planetary positions and house systems.

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.

TianJi Astrology MCP logo, by TianJi AstrologyCommunity listingStreamable HTTPNo sign-inEndpoint checked 2026-11-01Published by TianJi Astrology
MCP endpoint (Streamable HTTP)
https://mcp.tianji-astrology.com/mcp
Vendor documentation

What you can do with it

  • Compute natal charts with planetary positions and aspects
  • Get current planetary transits for a specific date
  • Retrieve detailed zodiac sign profiles

Source and maintenance

Community listingRegistry 1.0.0
mcp-registry: io.github.feifeizhao25-ship-it/tj-mcp@1.0.0Source repositoryProject website
Maintenance checked

Protocol and capabilities

Server
TianJi Astrology 4.1.3
MCP protocol
2025-06-18
Tools
4 advertised
Resources
0 advertised
Resource templates
0 advertised
Prompts
0 advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": true
  },
  "logging": {},
  "prompts": {
    "listChanged": true
  },
  "resources": {
    "subscribe": false,
    "listChanged": true
  }
}

Server-provided instructions

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

TianJi computes real astrological charts (ephemeris-grade planetary positions, houses, aspects) — not generic sun-sign content. Use compute_natal_chart for birth charts, get_current_transits for today's sky, get_sign_profile for reference facts. All computation, no horoscope fluff. By tianji-astrology.com.

Tools

4 advertised

compute_natal_chart — Compute Natal Chart
Advertised by the server during the last successful anonymous check.

Compute a full natal (birth) chart: 10 planets (sign/degree/house/retrograde), 12 Placidus house cusps, and inter-planetary aspects (major aspects, classic orbs). Pass lng/lat/tz_str (e.g. -74.01, 40.71, 'America/New_York') for exact offline computation; otherwise city+nation are geocoded online.

compute_natal_chart input schema
{
  "type": "object",
  "required": [
    "name",
    "year",
    "month",
    "day"
  ],
  "properties": {
    "day": {
      "type": "integer"
    },
    "lat": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "lng": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "city": {
      "type": "string",
      "default": "Greenwich"
    },
    "hour": {
      "type": "integer",
      "default": 12
    },
    "name": {
      "type": "string"
    },
    "year": {
      "type": "integer"
    },
    "month": {
      "type": "integer"
    },
    "minute": {
      "type": "integer",
      "default": 0
    },
    "nation": {
      "type": "string",
      "default": "GB"
    },
    "tz_str": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    }
  },
  "additionalProperties": false
}
compute_natal_chart output schema
{
  "type": "object",
  "required": [
    "result"
  ],
  "properties": {
    "result": {
      "type": "string"
    }
  },
  "x-fastmcp-wrap-result": true
}
get_current_transits — Get Current Transits
Advertised by the server during the last successful anonymous check.

Today's planetary positions (UTC now at Greenwich) — the current sky, for transit analysis, daily overviews, and timing work.

get_current_transits input schema
{
  "type": "object",
  "properties": {},
  "additionalProperties": false
}
get_current_transits output schema
{
  "type": "object",
  "required": [
    "result"
  ],
  "properties": {
    "result": {
      "type": "string"
    }
  },
  "x-fastmcp-wrap-result": true
}
get_sign_profile — Get Sign Profile
Advertised by the server during the last successful anonymous check.

Reference card for a zodiac sign: element, modality, ruling planet.

get_sign_profile input schema
{
  "type": "object",
  "required": [
    "sign"
  ],
  "properties": {
    "sign": {
      "type": "string"
    }
  },
  "additionalProperties": false
}
get_sign_profile output schema
{
  "type": "object",
  "required": [
    "result"
  ],
  "properties": {
    "result": {
      "type": "string"
    }
  },
  "x-fastmcp-wrap-result": true
}
validate_interpretation — Validate Interpretation
Advertised by the server during the last successful anonymous check.

Anti-hallucination confirmation gate (kosma-style): verify interpretation claims are grounded in the chart before publishing them. chart_json = exact JSON from compute_natal_chart or get_current_transits. claims = JSON array: [{"text": "...", "factors": [ {"type": "aspect", "a": "Sun", "b": "Moon"}, # aspect exists in chart {"type": "planet_house", "a": "Sun", "b": 5}, # planet is in that house {"type": "planet_sign", "a": "Sun", "b": "Leo"}, # planet is in that sign {"type": "house_sign", "a": 5, "b": "Leo"}]}] # house cusp is in that sign A claim is supported only if >= 2 of its factors independently exist in the chart. Returns per-claim verdicts; gate = "blocked" if any claim is unsupported — rewrite the claim against verified factors or drop it.

validate_interpretation input schema
{
  "type": "object",
  "required": [
    "chart_json",
    "claims"
  ],
  "properties": {
    "claims": {
      "type": "string"
    },
    "chart_json": {
      "type": "string"
    }
  },
  "additionalProperties": false
}
validate_interpretation output schema
{
  "type": "object",
  "required": [
    "result"
  ],
  "properties": {
    "result": {
      "type": "string"
    }
  },
  "x-fastmcp-wrap-result": true
}

Prompts

0 advertised

No prompt definitions available.

Resources

0 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
530 ms
95th percentile latency
530 ms

Maintenance history

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

  • · probe · passed · 530 ms · metadata changed · 4 tool(s), 0 resource(s), 0 resource template(s), 0 prompt(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 tianji-astrology-mcp https://mcp.tianji-astrology.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 tianji-astrology-mcp --url https://mcp.tianji-astrology.com/mcp

Cursor

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

Cline

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

VS Code

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

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