Magento – Get all categories with custom attributes in Magento 2 REST Api

I am using Magento 2 rest api for listing all the catgories.

{{production_url}}/index.php/rest/V1/categories

It will return all the categories,

{
    "id": 2,
    "parent_id": 1,
    "name": "Default Category",
    "is_active": true,
    "position": 1,
    "level": 1,
    "product_count": 0,
    "children_data": [{
        "id": 3,
        "parent_id": 2,
        "name": "T-shirts",
        "is_active": true,
        "position": 1,
        "level": 2,
        "product_count": 8,
        "children_data": []
    }, {
        "id": 4,
        "parent_id": 2,
        "name": "Phants",
        "is_active": true,
        "position": 2,
        "level": 2,
        "product_count": 0,
        "children_data": []
    }, {
        "id": 5,
        "parent_id": 2,
        "name": "Chridar",
        "is_active": true,
        "position": 3,
        "level": 2,
        "product_count": 0,
        "children_data": []
    }]
}

But i need custom attributes for every categories in the result.But now i have to call the below api for getting custom attributes.

{{production_url}}/index.php/rest/V1/categories/3

It will return ,

{
    "id": 3,
    "parent_id": 2,
    "name": "T-shirts",
    "is_active": true,
    "position": 1,
    "level": 2,
    "children": "",
    "created_at": "2017-06-02 11:21:16",
    "updated_at": "2017-06-02 11:21:16",
    "path": "1/2/3",
    "available_sort_by": [],
    "include_in_menu": true,
    "custom_attributes": [
        {
            "attribute_code": "description",
            "value": "<p>retest</p>"
        },
        {
            "attribute_code": "image",
            "value": "Screen_Shot_2017-06-16_at_4.06.35_PM.png"
        },
        {
            "attribute_code": "display_mode",
            "value": "PRODUCTS"
        },
        {
            "attribute_code": "is_anchor",
            "value": "1"
        },
        {
            "attribute_code": "path",
            "value": "1/2/3"
        },
        {
            "attribute_code": "children_count",
            "value": "0"
        },
        {
            "attribute_code": "custom_use_parent_settings",
            "value": "0"
        },
        {
            "attribute_code": "custom_apply_to_products",
            "value": "0"
        },
        {
            "attribute_code": "url_key",
            "value": "redwine"
        },
        {
            "attribute_code": "url_path",
            "value": "redwine"
        }
    ]
}

Suppose if there are n catgories i need to call n api for getting custom attributes.Is there any single api for getting all the attributes for all categories in a single API?