ComfyUI Builder MCP Server

Tell your AI assistant what image to generate - it builds and runs the ComfyUI workflow for you. Works with Claude Desktop, Cursor, and any MCP-compatible client. It runs locally over stdio via the published package.

People who work with comfyui and image generation and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-09-23 · ★ 3 · #68 OF 193 MAINTAINED MEDIA · VERIFIED 2026-09-30

MIT · TypeScript servers · how we verify → /methodology

01 · Install ComfyUI Builder

before you install - you'll need

COMFYUI_HOST

Environment variables documented in the project's README - it lists which are required and which have defaults.

Claude Code

claude mcp add mit9-mcp-comfy-ui-builder -- npx -y mcp-comfy-ui-builder

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "mit9-mcp-comfy-ui-builder": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-comfy-ui-builder"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

npm package mcp-comfy-ui-builder - unscoped; check the name against the project README before installing

registry namespace io.github.MIt9 is GitHub-verified and matches the repo owner

03 · Who maintains ComfyUI Builder

ComfyUI Builder is maintained by mit9. We track 2 MCP servers from mit9 - 1 actively maintained, 3 combined GitHub stars, oldest repo from Feb 2026.

04 · Facts

repository: github.com/mit9/mcp-comfy-ui-builder
category: media - ranked #68 of 193 actively-maintained media servers as of 2026-09-30.
registry: io.github.MIt9/comfy-ui-builder (active, first published 2026-02-03 · 15 versions)
packages: npm:mcp-comfy-ui-builder

05 · ComfyUI Builder FAQ

What is ComfyUI Builder?

Is ComfyUI Builder still maintained?

Yes - as of 2026-09-30, its last commit was 2026-09-23. We re-verify nightly.

How do I install ComfyUI Builder?

Run `npx -y mcp-comfy-ui-builder`. The README documents one environment variable (COMFYUI_HOST) to set first. You can also paste the ready-made client config above.

Does ComfyUI Builder run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

06 · Alternatives to ComfyUI Builder

Alternatives to ComfyUI Builder

Maintained media servers if ComfyUI Builder isn't the fit.

More media MCP servers · Paper Banana CN · Prompt To Asset · Logic Pro MCP · Video Transcriber

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