# Lo Shu grid

`POST https://api.astroway.info/v1/numerology/lo-shu-grid`

The 3x3 Lo Shu square (4 9 2 / 3 5 7 / 8 1 6) filled from the digits of a birth date, with the driver (moolank) and conductor (bhagyank) added as Indian practice does (each can be switched off): present, missing and repeated numbers, the six planes (mental, emotional, practical, thought, will, action) and the arrows, the full and empty lines of the square.

Group: Numerology: Indian. Auth: `X-Api-Key` header. Operation ID: `numerology_lo-shu-grid`.

## Parameters

| Name | In | Required | Type | Description |
|---|---|---|---|---|
| `fields` | query | no | string | Comma-separated dotted paths, relative to `data`, to keep in the response. A path is applied to every element of an array, so `planets.name` means the name of each planet. Paths that match nothing come back in `_fields_unmatched`; a list where nothing matches at all is a 400, because an empty object would be a confident wrong answer. |
| `precision` | query | no | integer | Round every non-integer number in the response to this many decimal places. Integers are left alone, because an id is not a measurement. Ecliptic longitudes ship with fourteen decimals by default; 2 is about a tenth of an arcminute. |
| `Idempotency-Key` | header | no | string | Unique per logical operation, kept across retries. For 24 hours from the first request, a repeat with the same key, method, path, body and query string returns the stored response with `Idempotent-Replayed: true` and costs 0 credits. The same key with a different body or query string is a 409 `IDEMPOTENCY_KEY_REUSED`; a repeat while the first is still running is a 409 `IDEMPOTENCY_IN_PROGRESS`. Only 2xx responses are kept. See /idempotency/. |

## Request body

| Field | Type | Required | Description |
|---|---|---|---|
| `date` | string | yes |  |
| `addDriver` | boolean | no | Add the driver (moolank) to the grid. Default true. |
| `addConductor` | boolean | no | Add the conductor (bhagyank) to the grid. Default true. |

```json
{
  "date": "1990-05-15"
}
```

## Responses

| Status | Meaning |
|---|---|
| 200 | Successful calculation |
| 400 | Validation error |
| 401 | Missing or invalid API key |

### Success fields, under `data`

| Field | Type | Required | Description |
|---|---|---|---|
| `date` | string | no |  |
| `driver` | object | no |  |
| `driver.number` | number | no |  |
| `driver.planet` | string | no |  |
| `conductor` | object | no |  |
| `conductor.number` | number | no |  |
| `conductor.planet` | string | no |  |
| `digits` | number[] | no |  |
| `added` | object[] | no |  |
| `grid` | number[][] | no |  |
| `cells` | object[] | no |  |
| `present` | number[] | no |  |
| `missing` | number[] | no |  |
| `repeated` | object[] | no |  |
| `planes` | object[] | no |  |
| `arrows` | object | no |  |
| `arrows.strength` | object[] | no |  |
| `arrows.weakness` | object[] | no |  |
| `notes` | string[] | no |  |

## Example

```bash
curl -X POST https://api.astroway.info/v1/numerology/lo-shu-grid \
  -H "X-Api-Key: aw_live_..." \
  -H "Content-Type: application/json" \
  -d '{ "date": "1990-05-15" }'
```

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Rendered from https://api.astroway.info/v1/openapi.json. HTML page: https://api.astroway.info/docs/api/operations/numerology_lo-shu-grid/