curl --request POST \
  --url https://api.oneinbox.ai/v1/calls/web \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "agent_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "variables": {},
  "overrides": {
    "llm": {
      "model": "<string>",
      "temperature": 123,
      "system_prompt": "<string>"
    },
    "transcriber": {
      "model": "<string>",
      "language": "<string>"
    },
    "tts": {
      "voice_id": "<string>",
      "model": "<string>",
      "speed": 123,
      "stability": 123
    },
    "first_message": "<string>"
  },
  "metadata": {}
}
'

{
  "id": "<string>",
  "agent_id": "<string>",
  "type": "<string>",
  "status": "<string>",
  "room_name": "<string>",
  "server_url": "<string>",
  "participant_token": "<string>",
  "created_at": "2023-11-07T05:31:56Z"
}