curl https://sandbox.core.linkio.world/api/customers/cus_4hT9pL2mQx8VnR3tY7wZ1cB5dE/details \
  -H "X-BRIDGE-API-Key: $BRIDGE_API_KEY" \
  -H "API-Version: 2026-10-29-atlas"

{
  "status": "success",
  "message": "Customer details retrieved",
  "customer": {
    "id": "cus_4hT9pL2mQx8VnR3tY7wZ1cB5dE",
    "type": "retail",
    "name": "Ada Obi",
    "email": "ada@example.com",
    "phone": "+2348012345678",
    "address": null,
    "country": null,
    "metadata": {}
  }
}

{
  "error": {
    "type": "resource_not_found",
    "code": "customer_not_found",
    "message": "Customer cus_4hT9pL2mQx8VnR3tY7wZ1cB5dE not found",
    "request_id": "req_3VnR7tY1wZ4cB6dE8fK2mQ9xLp",
    "status": 404
  }
}