curl --request GET \
  --url https://app.arxena.com/people-api/taxonomy/constants

const options = {method: 'GET'};

fetch('https://app.arxena.com/people-api/taxonomy/constants', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://app.arxena.com/people-api/taxonomy/constants"

response = requests.get(url)

print(response.text)

{
  "status": "ok",
  "gradeLevels": [
    {
      "id": "leadership",
      "label": "Leadership",
      "description": "Senior leaders and heads of function."
    }
  ],
  "gradeCategories": [
    {
      "id": "senior",
      "label": "Senior",
      "description": "Senior / leadership band within a function root."
    }
  ],
  "functionRoots": [
    {
      "id": "human resources",
      "label": "Human Resources",
      "description": "Department family: human resources."
    }
  ]
}