curl --request GET \
  --url https://api.realtimelca.com/epd/api/material/epdspecificationform \
  --header 'Authorization: Bearer <token>'

{
  "0": {
    "Enum": "EN15804A1",
    "DisplayName": "EN15804A1"
  },
  "1": {
    "Enum": "EN15804A2",
    "DisplayName": "EN15804A2"
  }
}