curl --request GET \
  --url https://api-prod.blaaiz.com/api/external/customer/{customer}/document/{document} \
  --header 'Authorization: Bearer <token>'

{
  "message": "Document retrieved successfully",
  "data": {
    "id": "019a6e10-1fb3-7b2f-8f8b-ad1e92c4017a",
    "business_customer_id": "019a6da3-4a9a-7033-81b9-12489eff13ee",
    "type": "CERTIFICATE_OF_INCORPORATION",
    "name": "Acme Inc — Certificate of Incorporation.pdf",
    "extension": "pdf",
    "description": "Filed 2019-03-12, Companies House",
    "status": "APPROVED",
    "admin_comments": null,
    "url": "https://s3.amazonaws.com/...?X-Amz-Signature=...",
    "created_at": "2026-04-20T10:14:31.000000Z",
    "updated_at": "2026-04-22T08:01:12.000000Z"
  }
}