HeFu is an AI API gateway that gives you one OpenAI-compatible key for every major model — GPT, Claude, Gemini, plus first-class access to Chinese models (DeepSeek, Qwen, Kimi, GLM, MiniMax) that normally require a Chinese phone number and local billing. USD pay-as-you-go, no monthly minimum, Stripe checkout with GrabPay / PayNow / FPX for Southeast Asia.