curl --request GET \
  --url https://api.arcuserp.com/v1/products/{id}/inventory \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "product_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "on_hand": 123,
    "allocated": 123,
    "available": 123,
    "total_value": 123,
    "by_location": [
      {
        "location_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "location_name": "<string>",
        "on_hand": 123,
        "allocated": 123,
        "available": 123
      }
    ]
  }
}