# Bind Rune

`POST https://api.astroway.info/v1/runes/bind-rune`

Joins two to four runes on one stave (or the runes whose meanings name an `intent`), returning each rune with its poem stanza and SVG, the combined strokes as coordinates and a ready SVG of the bind rune.

Group: Elder Futhark Runes. Auth: `X-Api-Key` header. Operation ID: `runes_bind-rune`.

## 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 |
|---|---|---|---|
| `runes` | "fehu" \| "uruz" \| "thurisaz" \| "ansuz" \| "raidho" \| "kenaz" \| "gebo" \| "wunjo" \| …[] | no | Two to four Elder Futhark slugs to bind, e.g. ["algiz", "sowilo"]. |
| `intent` | string | no | Without runes: a word such as protection, wealth or journey; the runes whose meanings name it are bound (up to three). |

```json
{
  "runes": [
    "algiz",
    "sowilo"
  ]
}
```

## Responses

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

### Success fields, under `data`

| Field | Type | Required | Description |
|---|---|---|---|
| `intent` | object | no |  |
| `runes` | object[] | no |  |
| `bindRune` | object | no |  |
| `bindRune.name` | string | no |  |
| `bindRune.strokes` | object[] | no |  |
| `bindRune.svg` | string | no |  |
| `bindRune.coordinates` | string | no |  |
| `reading` | string | no |  |
| `basis` | string | no |  |
| `note` | string | no |  |
| `source` | string | no |  |

## Example

```bash
curl -X POST https://api.astroway.info/v1/runes/bind-rune \
  -H "X-Api-Key: aw_live_..." \
  -H "Content-Type: application/json" \
  -d '{ "runes": [ "algiz", "sowilo" ] }'
```

---

Rendered from https://api.astroway.info/v1/openapi.json. HTML page: https://api.astroway.info/docs/api/operations/runes_bind-rune/