## Get a custom field

`GET https://getkollek.com/api/collection-types/{collectionType}/custom-fields/{customField}`

Retrieve a single custom field by its ID. The field must belong to the collection type in the URL.

**Permissions:** Any member of the account.

### Path parameters

- `collectionType` (integer, required): The ID of the collection type the field belongs to.
- `customField` (integer, required): The ID of the custom field.

**Returns:** A custom_field object, or 404 when the field or the type does not belong to your account.

### Example request

```bash
curl https://getkollek.com/api/collection-types/1/custom-fields/2 \
  -H "Authorization: Bearer $API_KEY" \
  -H "Accept: application/json"
```

### Example response

`Status: 200`

```json
{
    "data": {
        "type": "custom_field",
        "id": "2",
        "attributes": {
            "name": "Grade",
            "field_type": "select",
            "options": [
                "NM",
                "VF",
                "FN"
            ],
            "position": 2,
            "group_id": null,
            "created_at": 1752537600,
            "updated_at": 1752537600
        },
        "links": {
            "self": "https://getkollek.com/api/collection-types/1/custom-fields/2"
        }
    }
}
```