curl https://flameproxies.com/api/customer/packages/PACKAGE_ID/add-data \
  -H "Authorization: Bearer fp_live_xxx" \
  -H "Content-Type: application/json" \
  -d '{"quantity":2}'

import requests

package_id = 123
resp = requests.post(
    f"https://flameproxies.com/api/customer/packages/{package_id}/add-data",
    headers={"Authorization": "Bearer fp_live_xxx"},
    json={"quantity": 2},
)
print(resp.json()["order"])

const packageId = 123;
const resp = await fetch(
  `https://flameproxies.com/api/customer/packages/${packageId}/add-data`,
  {
    method: "POST",
    headers: {
      Authorization: "Bearer fp_live_xxx",
      "Content-Type": "application/json",
    },
    body: JSON.stringify({ quantity: 2 }),
  }
);
console.log(await resp.json());

{
  "package_id": 123,
  "internal_id": "70437286-78a1-427c-b9fd-c299baadf3a9",
  "subuser_id": "56789",
  "order": {
    "id": 988,
    "status": "paid",
    "action": "topup",
    "product": "premium_residential",
    "quantity": 2,
    "gb_credit_used": 1,
    "billable_quantity": 1,
    "total_amount": 3.5,
    "created_at": "2026-05-13T12:00:00.000Z"
  }
}