www.shirt.sh provides a lightweight API for on-demand custom apparel, combining image-based uploads and AI-generated shirt designs with direct purchase capability. It exposes endpoints to create printable shirts from user images (/api/shirts/from-image) and to generate AI-driven designs plus checkout (/api/shirts), operating on the base network with a flat price entry. This is built for developers looking to integrate print‑on‑demand apparel, automated design generation, and order fulfillment into apps, marketplaces, or marketing workflows.