UnoRouter

UnoRouter is an AI API with a genuinely free lane for hobbyists and builders that opens Claude, GPT, Gemini, Qwen and other models through a single key. Models tagged free cost nothing and need no credit card, so you can try a chatbot idea or a script before spending anything. The endpoint is OpenAI-compatible, so Claude Code, Cline, OpenCode and most AI clients accept it as a custom base URL. If a provider goes down, requests fail over to another one on their own. When you outgrow the free tier you simply pay as you go. The project is open source, and its web chat stores conversations locally in your browser.