curl --request POST \
  --url http://localhost:8080/anthropic/v1/messages/count_tokens \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "claude-3-opus-20240229",
  "max_tokens": 123,
  "messages": [
    {
      "role": "user",
      "content": "<string>"
    }
  ],
  "system": "<string>",
  "metadata": {
    "user_id": "<string>"
  },
  "stream": true,
  "temperature": 0.5,
  "top_p": 123,
  "top_k": 123,
  "stop_sequences": [
    "<string>"
  ],
  "tools": [
    {
      "type": "custom",
      "name": "<string>",
      "description": "<string>",
      "input_schema": {},
      "cache_control": {
        "type": "ephemeral",
        "ttl": "<string>"
      },
      "display_width_px": 123,
      "display_height_px": 123,
      "display_number": 123,
      "enable_zoom": true,
      "max_uses": 123,
      "allowed_domains": [
        "<string>"
      ],
      "blocked_domains": [
        "<string>"
      ],
      "user_location": {
        "type": "approximate",
        "city": "<string>",
        "country": "<string>",
        "timezone": "<string>"
      }
    }
  ],
  "tool_choice": {
    "type": "auto",
    "name": "<string>",
    "disable_parallel_tool_use": true
  },
  "mcp_servers": [
    {
      "type": "<string>",
      "name": "<string>",
      "url": "<string>",
      "authorization_token": "<string>",
      "tool_configuration": {
        "enabled": true,
        "allowed_tools": [
          "<string>"
        ]
      }
    }
  ],
  "thinking": {
    "type": "enabled",
    "budget_tokens": 123
  },
  "output_format": {},
  "fallbacks": [
    "<string>"
  ]
}
'

{
  "input_tokens": 123
}