Set the project's variants-prototype toggle

curl --request PUT \
  --url https://backend.branch.flowengineering.com/project/{projectId}/variants-enabled \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --header 'customer: <customer>' \
  --data '
{
  "enabled": true
}
'

import requests

url = "https://backend.branch.flowengineering.com/project/{projectId}/variants-enabled"

payload = { "enabled": True }
headers = {
    "customer": "<customer>",
    "X-API-Key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.put(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'PUT',
  headers: {
    customer: '<customer>',
    'X-API-Key': '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({enabled: true})
};

fetch('https://backend.branch.flowengineering.com/project/{projectId}/variants-enabled', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "enabled": true
}