curl --request POST \
  --url https://app.autoposting.ai/api-proxy/features/interest \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "feature": "webhooks",
  "comment": "Need real-time delivery events."
}
'

{
  "success": true,
  "data": {
    "registered": true
  }
}