Local MCP server and Blockbench plugin for Minecraft model, UV, texture, animation, and export workflows.
View on GitHub ↗Ruin's BlockBenchMCP connects an MCP client to Blockbench Desktop 5.1.6. It provides typed model operations, a high-level task interface, native Blockbench controls, and inspection tools for modeling, UV, texture, animation, and export workflows.
The project is intended for local use. The MCP server communicates with the Blockbench plugin over an authenticated loopback WebSocket connection; it does not expose a public network service.
Ruin's BlockBenchMCP is designed first for GPT-6 Astra. Astra handles the visual decisions—reference comparison, Minecraft-style interpretation, per-face texture planning, and multi-view judgement—while this MCP provides the deterministic Blockbench operations, checkpoints, and verification needed to apply those decisions safely. The goal is an authoring loop in which Astra can inspect, create, and revise a complete Minecraft asset instead of producing an isolated model or flat image.
The MCP protocol itself is model-agnostic, but the included Minecraft authoring workflow is Astra-first. Other models can connect to the same tools, while their ability to retain the full reference, texture-density, and visual-review procedure may vary.
- Model creation and editing for groups, cubes, meshes, bones, and armatures - UV editing, seams, islands, projection, density, transforms, and selection - Textures, layers, raster painting, brush settings, presets, and color picking - Animation keys, events, controllers, IK configuration, and IK baking - Mesh topology operations, vertex weights, cleanup, merge, split, and knife tools - Native actions, menus,
From the project README.
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