需求简称：""
需求内容：I need an AI chat API that can be used inside an Android voice assistant application. The API should: - Accept user text input - Return intelligent AI responses - Support JSON format response - Be fast and lightweight - Allow at least 1000 requests per day Use case: This API will be used in an Android AI assistant to answer questions, help with tasks, and generate text responses. Expected Response Format: JSON Example: { "question": "Hello", "answer": "Hello, how can I help you?" }