curl --request PUT \
  --url https://realtime-api.voiceflow.com/v1/stable/environment/merge \
  --header 'Authorization: Bearer <token>'
  --header 'Content-Type: application/json' \
  --data '{
  "sourceEnvironmentAlias": "<string>",
  "targetEnvironmentAlias": "<string>",
  "removeSourceEnvironment": false
}'

const response = await fetch('https://realtime-api.voiceflow.com/v1/stable/environment/merge?projectID=<projectID>', {
  method: 'PUT',
  headers: {
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "sourceEnvironmentAlias": "<string>",
    "targetEnvironmentAlias": "<string>",
    "removeSourceEnvironment": false
  }),
});
const data = await response.json();

import requests

response = requests.put(
    'https://realtime-api.voiceflow.com/v1/stable/environment/merge?projectID=<projectID>',
    headers={'Authorization': 'Bearer <token>'},
    json={
      "sourceEnvironmentAlias": "<string>",
      "targetEnvironmentAlias": "<string>",
      "removeSourceEnvironment": False
    },
)
data = response.json()

vf environment merge --project-id <projectID> \
  < body.json