curl https://api.tracklysms.com/api/v2/messages/a1b2c3d4 \
  -H "X-Api-Key: trk_your_api_key"

{
  "message": {
    "id": "a1b2c3d4",
    "from_number": "+18005551234",
    "to_number": "+14155551234",
    "body": "Hi",
    "status": "delivered",
    "segment_count": 1,
    "encoding": "GSM-7",
    "sending_list_id": 88,
    "timestamp": "2026-07-20T14:03:11.000000Z",
    "updated_at": "2026-07-20T14:05:00.000000Z",
    "dlr_status": "delivered",
    "is_terminal": true,
    "is_delivered": true,
    "provider_message_id": "O3iFf1Eu",
    "cost_state": "billed",
    "external_ids": { "external_location_id": "loc_west" }
  }
}

{ "error": "Message not found", "code": "message_not_found" }