curl https://api.bey.dev//v1/agent \
    -H 'Content-Type: application/json' \
    -H "x-api-key: $BEY_API_KEY" \
    -d '{
          "avatar_id": "01234567-89ab-cdef-0123-456789abcdef",
          "system_prompt": "You are a helpful assistant."
        }'

{
  "id": "01234567-89ab-cdef-0123-456789abcdef",
  "avatar_id": "01234567-89ab-cdef-0123-456789abcdef",
  "system_prompt": "You are a helpful assistant.",
  "name": "John Doe",
  "language": "en",
  "greeting": "Hello!",
  "max_session_length_minutes": 30,
  "capabilities": [
    "webcam_vision"
  ]
}