curl https://api.mintfax.com/v1/account/webhooks \
  -H "Authorization: Bearer fx_test_abc123..."

{
  "data": [
    {
      "id": "e1f2a3b4-c5d6-7890-abcd-ef0123456789",
      "url": "https://acme.com/webhooks/mintfax",
      "is_active": true,
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z",
      "events": [
        "fax.delivered",
        "fax.failed"
      ],
      "description": "Production notifications"
    }
  ]
}