# Environment Variables # OpenAI API OPENAI_API_KEY=sk-xxx # Anthropic API ANTHROPIC_API_KEY=sk-ant-xxx # DeepSeek API DEEPSEEK_API_KEY=sk-xxx # OpenRouter API (for accessing multiple models) OPENROUTER_API_KEY=sk-or-xxx # Google AI API GOOGLE_API_KEY=xxx # xAI API XAI_API_KEY=xxx # Optional: Custom API endpoints # CUSTOM_API_ENDPOINT=http://localhost:8080