Open-Source MCP Server Connects Claude/Cursor to ComfyUI with 50+ Tools
Less_Actuary_9441 · reddit · 2026-09-24
A developer released mcp-comfy-ui-builder (MIT), an open-source MCP server that connects Claude Desktop, Claude Code, and Cursor to a local ComfyUI instance. Describe a workflow in natural language and the model checks GPU VRAM, assembles the node graph from templates, validates compatibility, and executes via WebSockets with sub-100ms per-node progress streaming (vs 1.5s HTTP polling). Features include 50+ MCP tools (node discovery, dynamic graph construction, model management, queue inspection), a knowledge base pre-indexing 62 core nodes with custom-node sync via npm run sync-nodes, 9 built-in templates (txt2img, img2img, inpainting, upscale, LoRA, ControlNet, batch chains), and pre-run getsystemresources checks to avoid OOM. Install via npm or Docker; config is a one-liner in claudedesktopconfig..
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