curl https://api.neuraldraft.io/v1/product-categories \
  -H "Authorization: Bearer ndsk_live_yourkey"

const cats = await nd.productCategories.list();

cats = requests.get("https://api.neuraldraft.io/v1/product-categories",
  headers={"Authorization": f"Bearer {key}"}).json()["data"]

<?php
$cats = json_decode((string) $client->get('product-categories', [
  'headers' => ['Authorization' => 'Bearer '.$key],
])->getBody(), true)['data'];

{
  "data": [
    {
      "id": 4,
      "name": "Studio essentials",
      "slug": "studio-essentials",
      "parent_id": null,
      "is_active": true,
      "children": [
        {
          "id": 5,
          "name": "Blocks",
          "slug": "blocks",
          "parent_id": 4,
          "is_active": true
        },
        {
          "id": 6,
          "name": "Mats",
          "slug": "mats",
          "parent_id": 4,
          "is_active": true
        }
      ]
    }
  ]
}

{
  "type": "https://api.neuraldraft.io/errors/unauthorized",
  "title": "Unauthorized",
  "status": 401,
  "detail": "API key missing or invalid.",
  "code": "unauthorized",
  "instance": "req_2Nh4PqRsTuVw"
}