curl https://api.v2.dealmachine.com/v1/mail/wallet/pricing \
  -H "Authorization: Bearer dm_sk_live_xxx"

{
  "data": {
    "plan_slug": "shared_volume",
    "sizes": [
      { "size": "4x6", "price_cents": 62, "label": "Plan price" },
      { "size": "6x9", "price_cents": 77, "label": "Plan price" },
      { "size": "6x11", "price_cents": 88, "label": "Plan price" }
    ],
    "plans": [
      {
        "plan_name": "Basic",
        "prices": [
          { "size": "4x6", "price_cents": 72 },
          { "size": "6x9", "price_cents": 87 },
          { "size": "6x11", "price_cents": 98 }
        ]
      },
      {
        "plan_name": "Pro",
        "prices": [
          { "size": "4x6", "price_cents": 62 },
          { "size": "6x9", "price_cents": 77 },
          { "size": "6x11", "price_cents": 88 }
        ]
      }
    ]
  }
}