Can't fetch model files or image files directly via URL with their extension

Can't fetch model files or image files directly via URL with their extension: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). I'm using Manyfold to manage my 3D model library and wanted to grab files directly by URL — e.g. hitting /libraries/1/models/2/model files/3.stl…