DMXAPI (Large Model API) is an intelligent API aggregation service platform launched by LangChain Chinese website to help developers easily connect to various large models and quickly enter the field of AI application development. It supports RMB pricing and directly connects more than 300 multimodal large models at home and abroad, covering text-to-text, text-to-image, text-to-video, and text-to-audio modalities. One key can be used for all models.