curl --request GET \
  --url https://api.agentpowers.ai/v1/purchases \
  --header 'Authorization: Bearer <token>'

{
  "items": [
    {
      "purchase_id": "<string>",
      "skill_slug": "<string>",
      "skill_title": "<string>",
      "amount_cents": 123,
      "currency": "<string>",
      "status": "<string>",
      "purchased_at": "<string>",
      "license_code": "<string>",
      "author_display_name": "<string>",
      "author_display_name_slug": "<string>"
    }
  ],
  "total": 123
}