curl --request GET \
  --url https://api.heffl.com/api/v2/sources \
  --header 'x-api-key: <api-key>'

{
  "data": [
    {
      "id": "<string>",
      "name": "<string>",
      "isActive": true,
      "description": "<string>"
    }
  ],
  "meta": {
    "hasMore": true,
    "nextCursor": "<string>"
  }
}