curl -X PATCH 'https://app.filemonk.io/api/v1/external/digital_products/b2c3d4e5-f6a7-8901-bcde-f12345678901' \
  -H 'X-Auth-Token: fm_api_key_your_key_here' \
  -H 'Content-Type: application/json' \
  -d '{
    "digital_product": {
      "asset_ids": [
        "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
        "c3d4e5f6-a7b8-9012-cdef-123456789012"
      ]
    }
  }'

curl -X PATCH 'https://app.filemonk.io/api/v1/external/digital_products/b2c3d4e5-f6a7-8901-bcde-f12345678901' \
  -H 'X-Auth-Token: fm_api_key_your_key_here' \
  -H 'Content-Type: application/json' \
  -d '{
    "digital_product": {
      "preorder_enabled": true,
      "preorder_launch_date": "2026-05-01T09:00:00Z",
      "custom_message": "Your download will be available on launch day!",
      "preorder_heading": "Coming Soon",
      "preorder_description": "Your files will be ready on May 1st."
    }
  }'

const productId = 'b2c3d4e5-f6a7-8901-bcde-f12345678901';
const response = await fetch(
  `https://app.filemonk.io/api/v1/external/digital_products/${productId}`,
  {
    method: 'PATCH',
    headers: {
      'X-Auth-Token': 'fm_api_key_your_key_here',
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({
      digital_product: {
        asset_ids: [
          'a1b2c3d4-e5f6-7890-abcd-ef1234567890',
          'c3d4e5f6-a7b8-9012-cdef-123456789012'
        ]
      }
    })
  }
);
const data = await response.json();

import requests

product_id = 'b2c3d4e5-f6a7-8901-bcde-f12345678901'
response = requests.patch(
    f'https://app.filemonk.io/api/v1/external/digital_products/{product_id}',
    headers={'X-Auth-Token': 'fm_api_key_your_key_here'},
    json={
        'digital_product': {
            'asset_ids': [
                'a1b2c3d4-e5f6-7890-abcd-ef1234567890',
                'c3d4e5f6-a7b8-9012-cdef-123456789012'
            ]
        }
    }
)
data = response.json()

{
  "digital_product": {
    "id": "b2c3d4e5-f6a7-8901-bcde-f12345678901",
    "shopify_product_id": 8847261098265,
    "shopify_variant_id": null,
    "assets": [
      {
        "id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
        "type": "external",
        "name": "Photoshop Brushes Pack",
        "filename": "brushes-pack-v2.zip",
        "external_url": "https://cdn.example.com/files/brushes-pack-v2.zip",
        "content_type": "application/zip",
        "byte_size": 0,
        "created_at": "2026-03-01T14:30:00Z"
      },
      {
        "id": "c3d4e5f6-a7b8-9012-cdef-123456789012",
        "type": "external",
        "name": "Bonus Textures Pack",
        "filename": "bonus-textures.zip",
        "external_url": "https://cdn.example.com/files/bonus-textures.zip",
        "content_type": "application/zip",
        "byte_size": 0,
        "created_at": "2026-03-10T08:00:00Z"
      }
    ],
    "upsert_always": false,
    "custom_message": "Thanks for your purchase!",
    "preorder_enabled": false,
    "preorder_launch_date": null,
    "preorder_subject": null,
    "preorder_heading": null,
    "preorder_description": null,
    "created_at": "2026-03-05T10:00:00Z",
    "updated_at": "2026-04-08T10:00:00Z"
  }
}

{
  "error": "Digital product not found"
}

{
  "errors": ["Preorder launch date must be in the future"]
}