# POST smartwords

## Create or update smartwords

<mark style="color:green;">`POST`</mark> `/smartwords`

This endpoint updates key–value data stored in the smartwords (custom\_data) of the simulation space.

If the index exists then value data is overwritten, else a new entry created.

**Headers**

| Name          | Value              |
| ------------- | ------------------ |
| Content-Type  | `application/json` |
| Authorization | `Bearer <token>`   |

**Body**

The request body **must be an array** of Smartword index-value pairs - see example.

| Name    | Type   | Description                           |
| ------- | ------ | ------------------------------------- |
| `index` | string | Unique key for the custom data entry. |
| `value` | string | Text value associated with the index. |

**Example**

```
[
  {
    "index": "weather_condition",
    "value": "Heavy rain"
  },
  {
    "index": "fuel_supply",
    "value": "Low"
  },
  {
    "index": "public_alert_level",
    "value": "Amber"
  }
]
```

**Response**

{% tabs %}
{% tab title="202" %}
Success. Array has been updated.&#x20;

Not response body provided
{% endtab %}

{% tab title="400" %}
Bad request. Missing or invalid parameters

no response provided.
{% endtab %}

{% tab title="500" %}
Server error. Most likely bad or missing key
{% endtab %}
{% endtabs %}


---

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