A: Hi SolarBang, no API keys are needed. Contral comes with hosted AI models included, so you just sign in and start using Build mode and the teaching features, and usage counts against your plan's daily allowances. If you'd like, you can optionally bring your own key (OpenAI, Anthropic, Google Gemini, xAI, OpenRouter, Groq, Mistral, Ollama for local models, or any OpenAI-compatible provider). BYOK messages are counted separately, are unlimited on every AppSumo tier, and are billed directly by your provider. Thanks for checking out Contral!