curl --request GET \
  --url 'https://api.511.org/transit/lines?api_key='

{
  "Siri": {
    "ServiceDelivery": {
      "DataObjectDelivery": {
        "dataObjects": {
          "ServiceFrame": {
            "lines": {
              "Line": [
                {
                  "id": "SF:49",
                  "Name": "Van Ness/Mission",
                  "TransportMode": "bus",
                  "PublicCode": "49"
                }
              ]
            }
          }
        }
      }
    }
  }
}