curl --request POST \
  --url https://api.kapso.ai/platform/v1/customers \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "customer": {
    "name": "Acme Corp",
    "external_customer_id": "cus_abc123"
  }
}
'

{
  "data": {
    "id": "550e8400-e29b-41d4-a716-446655440000",
    "name": "Acme Corp",
    "external_customer_id": "cus_abc123",
    "created_at": "2025-01-15T10:00:00Z",
    "updated_at": "2025-01-15T10:00:00Z"
  }
}