This is a

LabFREED attribute server

Capabilities

Available Attribute Groups
https://mettorius.com/terms/attribute_group_demo
https://mettorius.com/terms/attribute_group_demo_lists
https://labfreed.org/terms/example/cat_analyzer

Supported Languages: en , fr

Default Language: en

Make a POST request to http://webtools.labfreed.org/attributes with the following body:

{
  "pac_ids": [
    "HTTPS://PAC.METTORIUS.COM/EXAMPLE"
  ],
  "language_preferences": [
    "fr",
    "de"
  ]
}

Consult the specification for details.

Demo https://webtools.labfreed.org/attributes/demo