curl --request GET \
  --url https://api.example.com/api/total_token_usage

{
  "total_calls": 123,
  "stt": {
    "deepgram": {
      "total_audio_seconds": 0,
      "total_audio_tokens": 0
    },
    "sarvam": {
      "total_audio_seconds": 0,
      "total_audio_tokens": 0
    }
  },
  "llm": {
    "openai": {
      "prompt_tokens": 0,
      "completion_tokens": 0,
      "total_tokens": 0
    },
    "openrouter": {
      "prompt_tokens": 0,
      "completion_tokens": 0,
      "total_tokens": 0
    }
  },
  "tts": {
    "elevenlabs": {
      "total_characters": 0,
      "total_tts_tokens": 0
    },
    "sarvam": {
      "total_characters": 0,
      "total_tts_tokens": 0
    }
  }
}