curl --request POST \
  --url https://realtime-api.voiceflow.com/v1/stable/function-variable/batch \
  --header 'Authorization: Bearer <token>'
  --header 'Content-Type: application/json' \
  --data '{
  "functionID": "<string>",
  "variables": [
    {
      "name": "<string>",
      "type": "input",
      "description": "<string>"
    }
  ]
}'

const response = await fetch('https://realtime-api.voiceflow.com/v1/stable/function-variable/batch?projectID=<projectID>&environmentAlias=<environmentAlias>', {
  method: 'POST',
  headers: {
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "functionID": "<string>",
    "variables": [
      {
        "name": "<string>",
        "type": "input",
        "description": "<string>"
      }
    ]
  }),
});
const data = await response.json();

import requests

response = requests.post(
    'https://realtime-api.voiceflow.com/v1/stable/function-variable/batch?projectID=<projectID>&environmentAlias=<environmentAlias>',
    headers={'Authorization': 'Bearer <token>'},
    json={
      "functionID": "<string>",
      "variables": [
        {
          "name": "<string>",
          "type": "input",
          "description": "<string>"
        }
      ]
    },
)
data = response.json()

vf function variable create-many --project-id <projectID> --environment-alias <environmentAlias> \
  < body.json