Polymart is now Voxel Shop! We're upgrading many features of the site, and during this open beta you will experience occasional bugs. Learn more
serverside mod framework for custom items, blocks, recipes and more

Looking for a seamless way to add custom blocks, items, furniture, and recipes to your Minecraft server—without forcing clients to install mods? CraftEngine is a powerful, server-side framework that lets you design, deploy, and manage unique in-game content while keeping full vanilla compatibility.
What Can CraftEngine Do?
Zero Client Modifications – Leverages smart packet interception to deliver custom assets directly to vanilla clients, ensuring a hassle-free player experience.
Automated Resource Pack Generation – Dynamically builds and distributes models and textures —with support for S3, Dropbox, Lobfile, or custom API hosting.
Advanced Custom Blocks – Utilizes ByteBuddy runtime class generation for dynamic block states, enabling deep customization without breaking vanilla mechanics.
Configuration-Driven Workflow – Define content through structured YAML with template processing, version conditional logic, and multilingual support—no coding expertise needed.
Optimized for Performance – Features chunk caching, compression, and efficient injection methods to minimize server overhead.
Broad Plugin Compatibility – Integrates smoothly with WorldEdit, PlaceholderAPI, and external item/model systems for extended functionality.

Versions on the polymart are only released every 2 to 4 weeks. We recommend joining our Discord community to access the latest development (dev) builds, as they provide faster bug fixes and early access to experimental features. |