curl --request POST \
  --url https://dev.voice.ai/api/v1/connection/connection-details \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "agent_id": "<string>",
  "metadata": "<string>",
  "environment": "<string>"
}
'

{
  "server_url": "<string>",
  "participant_token": "<string>",
  "call_id": "<string>"
}