curl --request GET \
  --url https://api.kit.com/v4/snippets/{id} \
  --header 'X-Kit-Api-Key: <api-key>'

{
  "snippet": {
    "id": 24,
    "name": "Welcome message",
    "snippet_type": "inline",
    "archived": false,
    "key": "welcome-message",
    "created_at": "2023-02-17T11:43:55Z",
    "updated_at": "2023-02-17T11:43:55Z",
    "content": "Hello {{ subscriber.first_name }}",
    "document": {
      "id": 139,
      "value": null,
      "value_html": "content",
      "value_plain": null,
      "version": 1
    }
  }
}