curl --request GET \
  --url https://api.helicone.ai/v2/experiment/{experimentId}/prompt-versions \
  --header 'Authorization: <api-key>'

{
  "data": [
    {
      "created_at": "<string>",
      "experiment_id": "<string>",
      "helicone_template": "<string>",
      "id": "<string>",
      "major_version": 123,
      "metadata": "<string>",
      "minor_version": 123,
      "model": "<string>",
      "organization": "<string>",
      "prompt_v2": "<string>",
      "soft_delete": true
    }
  ],
  "error": null
}