inventory_item_ids, location_ids, or both as filter parameters.curl --location --request GET 'https://demo.myshopify.com//admin/api//inventory_levels.json'{
    "inventory_levels": [
        {
            "inventory_item_id": 49148385,
            "location_id": 655441491,
            "available": 2,
            "updated_at": "2023-01-03T12:56:35-05:00",
            "admin_graphql_api_id": "gid://shopify/InventoryLevel/655441491?inventory_item_id=49148385"
        },
        {
            "inventory_item_id": 808950810,
            "location_id": 655441491,
            "available": 1,
            "updated_at": "2023-01-03T12:56:35-05:00",
            "admin_graphql_api_id": "gid://shopify/InventoryLevel/655441491?inventory_item_id=808950810"
        },
        {
            "inventory_item_id": 457924702,
            "location_id": 655441491,
            "available": 4,
            "updated_at": "2023-01-03T12:56:35-05:00",
            "admin_graphql_api_id": "gid://shopify/InventoryLevel/655441491?inventory_item_id=457924702"
        },
        {
            "inventory_item_id": 39072856,
            "location_id": 655441491,
            "available": 3,
            "updated_at": "2023-01-03T12:56:35-05:00",
            "admin_graphql_api_id": "gid://shopify/InventoryLevel/655441491?inventory_item_id=39072856"
        }
    ]
}