curl --request GET \
  --url https://api.example.com/api/v1/plans \
  --header 'x-api-key: <x-api-key>'

[
  {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "name": "<string>",
    "amount": 123,
    "currency": "<string>",
    "interval": "<string>",
    "interval_count": 123,
    "trial_period_days": 123,
    "is_active": true,
    "created_at": "2023-11-07T05:31:56Z"
  }
]