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ifc-bonsai-mcp

An MCP server that connects LLMs to IFC-based BIM workflows in Blender using the Bonsai add-on.

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Data offered docs-verified: IFC element creation and editing (walls, doors, roofs, stairs) within Blender · IFC scene and object inspection · Trimesh-based procedural geometry converted to IFC elements · IFC/IfcOpenShell knowledge search (RAG)
Formats docs-verified: IFC
Access llm-inferred: Open source, MIT licence (per metadata); no credentials documented in README. Requires a local install of Blender 4.4+ with the Bonsai add-on 0.8.2+ and Python 3.10+.

Use cases llm-inferred: Parametric wall, slab and roof creation in an IFC model from natural-language prompts · Scene and object property review of an IFC model via get_ifc_scene_overview and get_object_info · Converting Trimesh-generated custom geometry into native IFC elements for civils BIM models · Screenshot-based QA of BIM model state in Blender
Audience llm-inferred: BIM/civils engineers · BIM coordinators · architects

Constraints llm-inferred: Requires a local Blender 4.4+ installation with the Bonsai add-on and the BlenderMCP add-on connected · An empty IFC file must be saved before operations, otherwise changes do not reach the Blender scene · The general execute_code tool is unreliable for IFC operations and may be disabled · Knowledge base features need a local ChromaDB index and an embedding server · The author points users to a newer repository (bonsai-mcp) with a stronger code-generation focus, so this repo may receive less maintenance · Not an official Blender, Bonsai or IfcOpenShell project

Tools/install/auth auto-extracted from README; quality score heuristic (stars, recency, tool count, licence).

Metadata observed 15/10/2026 · research sweep: github-search