Advanced techniques

Sub-Sub-Lord Boundary Sensitivity

get_subsub_boundary

Quantifies how close every house cusp and planet sits to a sub-sub-lord boundary (the 2,187-cell KCIL precision grid). Returns per-position arc-seconds to nearest boundary, the alternate sub-sub-lord that would apply if the position shifted across the boundary, and a CRITICAL/WARNING/STABLE flag. Includes a 0-100 twin-divergence index estimating how strongly this chart's KCIL-level predictions depend on birth-second precision. Use for birth-time precision audits, twin-chart analysis, and boundary-sensitive rectification.

Parameters

Name	Type	Required	Description
birth_datetime	string	Yes	Birth date and time in ISO 8601 format (e.g., "1990-05-15T14:30:00").
latitude	number	Yes	Birth location latitude. Range: -90 to 90.
longitude	number	Yes	Birth location longitude. Range: -180 to 180.
utc_offset_minutes	number	Yes	UTC offset in minutes (e.g., 330 for IST, -300 for EST).
ayanamsa	enum: kp \| kp_new \| lahiri \| raman \| true_chitra \| khullar	No	Ayanamsa system. Defaults to kp.
threshold_arcsec	number	No	Critical-flag threshold in arc-seconds (default: 30).
include_planets	boolean	No	Include 9 planets in the analysis (default: true).
include_cusps	boolean	No	Include 12 house cusps (default: true).

Example call

Send the request as a standard MCP tools/call:

http

POST https://mcp.lumin.guru/mcp
Authorization: Bearer mcp_yourkey...
Accept: application/json, text/event-stream
Content-Type: application/json

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_subsub_boundary",
    "arguments": {
      "birth_datetime": "1992-08-14T04:32:00",
      "latitude": 6.927,
      "longitude": 79.861,
      "utc_offset_minutes": 330,
      "ayanamsa": "kp"
    }
  }
}

Birth data

This tool requires birth data on every call. The MCP server is stateless, so calling set_birth_profile first validates the data and returns the reading plan, but it does not store anything. Repeat the same five fields here.