List stages

curl --request GET \
  --url https://{instance}/api/v2/concepts/stage-masters \
  --header 'X-API-Key: <api-key>'

const options = {method: 'GET', headers: {'X-API-Key': '<api-key>'}};

fetch('https://{instance}/api/v2/concepts/stage-masters', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://{instance}/api/v2/concepts/stage-masters"

headers = {"X-API-Key": "<api-key>"}

response = requests.get(url, headers=headers)

print(response.text)

{
  "values": [
    {}
  ]
}