curl --request POST \
  --url https://www.anyfast.ai/v1/messages \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "claude-opus-4-8",
  "messages": [
    {
      "role": "user",
      "content": "Hello!"
    }
  ],
  "max_tokens": 8192,
  "temperature": 1,
  "frequency_penalty": 0,
  "presence_penalty": 0,
  "stream": false,
  "stop": "<string>"
}
'

{
  "id": "chatcmpl-abc123",
  "object": "chat.completion",
  "created": 123,
  "model": "claude-opus-4-8",
  "choices": [
    {
      "index": 123,
      "message": {
        "role": "assistant",
        "content": "Hello! How can I help you today?"
      }
    }
  ],
  "usage": {
    "prompt_tokens": 123,
    "completion_tokens": 123,
    "total_tokens": 123
  }
}