ComfyUI Builder

Name: ComfyUI Builder
Author: MIt9

by MIt9version 2.4.1i★ 4iRuns on your computer

Registry nameio.github.MIt9/comfy-ui-builder

How to install

Overview

Description from the maker (original English)

ComfyUI MCP server: knowledge base, workflow builder, real-time execution, models, plugins.

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Search & AI memory

Install

Pick the AI app you use, then copy the settings.

Passed 3/3 checks · Runs on your computer

First: which AI do you use?

ClaudeWeb · app · phoneChatGPTWebClaude CodeTerminalCursorCode editorVS CodeCode editorOtherOther apps

Pick your app and the steps appear below.

Works with Claude, with some setup first

You need a ComfyUI Builder key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a ComfyUI Builder key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
How to get a key is in the maker’s README below
Done
Open the Claude desktop app’s settings file
SettingsDeveloperEdit Config
Done

Paste these settings and save the file

{
  "mcpServers": {
    "comfy-ui-builder": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-comfy-ui-builder"
      ],
      "env": {
        "COMFYUI_HOST": "your-value",
        "COMFYUI_PATH": "your-value",
        "COMFYUI_KNOWLEDGE_DIR": "your-value"
      }
    }
  }
}

Paste the key only into the app’s field, never into a chat or to anyone

Done

Quit Claude and open it again
Done
Try it
Use ComfyUI Builder and tell me what you can do for me, then show me one thing
✓ If Claude says it is using ComfyUI Builder or shows a ComfyUI Builder tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

ChatGPT cannot connect ComfyUI Builder yet

ComfyUI Builder runs on your computer, but ChatGPT can only connect servers that run on the web

What you can do instead

A · Use an app that can connect ComfyUI Builder

Steps for Claude →You need a ComfyUI Builder key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone
Steps for Claude Code →You need a ComfyUI Builder key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)
Steps for Cursor →You need a ComfyUI Builder key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)
Steps for VS Code →You need a ComfyUI Builder key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)

B · Others in Search & AI memory that work with ChatGPT

Picked from the most used in the same category, only ones that connect by address with no key

AIHOT✓ ChatGPT
Sui Knowledge Base (kapa.ai)✓ ChatGPT
Exa✓ ChatGPT

Works with Claude Code, with some setup first

You need a ComfyUI Builder key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a ComfyUI Builder key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
How to get a key is in the maker’s README below
Done
Open Terminal
Mac: press Command+Space and type Terminal · Windows: open PowerShell
Done
4
Paste this command and press Enter
```
claude mcp add comfy-ui-builder --env COMFYUI_HOST=your-value --env COMFYUI_PATH=your-value --env COMFYUI_KNOWLEDGE_DIR=your-value -- npx -y mcp-comfy-ui-builder
```
Replace “your-value” with your key before pressing Enter
Paste the key only into the app’s field, never into a chat or to anyone
Done
Type /mcp in Claude Code
You should see ComfyUI Builder listed as connected
Done
Try it
Use ComfyUI Builder and tell me what you can do for me, then show me one thing
✓ If Claude Code says it is using ComfyUI Builder or shows a ComfyUI Builder tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with Cursor, with some setup first

You need a ComfyUI Builder key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a ComfyUI Builder key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
How to get a key is in the maker’s README below
Done
Click this button to open Cursor
Open in Cursor
Cursor asks you to confirm; click Install
Done
Fill in your key
In the ComfyUI Builder settings, COMFYUI_HOST, COMFYUI_PATH, COMFYUI_KNOWLEDGE_DIR is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in Cursor in Agent mode
Done
Try it
Use ComfyUI Builder and tell me what you can do for me, then show me one thing
✓ If Cursor says it is using ComfyUI Builder or shows a ComfyUI Builder tool in the answer, you are connected

Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with VS Code, with some setup first

You need a ComfyUI Builder key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a ComfyUI Builder key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
How to get a key is in the maker’s README below
Done
Click this button to open VS Code
Open in VS Code
VS Code asks you to confirm; click Install
Done
Fill in your key
In the ComfyUI Builder settings, COMFYUI_HOST, COMFYUI_PATH, COMFYUI_KNOWLEDGE_DIR is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in VS Code in Agent mode
Done
Try it
Use ComfyUI Builder and tell me what you can do for me, then show me one thing
✓ If VS Code says it is using ComfyUI Builder or shows a ComfyUI Builder tool in the answer, you are connected

Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.

See every app that uses MCP →

JSON settings are under “For developers” below

Stuck? Ask people who use ComfyUI Builder💬 Discussion →

For developers: Terminal commands and JSON settings

Installed on your computer

Claude Code

claude mcp add comfy-ui-builder --env COMFYUI_HOST=your-value --env COMFYUI_PATH=your-value --env COMFYUI_KNOWLEDGE_DIR=your-value -- npx -y mcp-comfy-ui-builder

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "comfy-ui-builder": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-comfy-ui-builder"
      ],
      "env": {
        "COMFYUI_HOST": "your-value",
        "COMFYUI_PATH": "your-value",
        "COMFYUI_KNOWLEDGE_DIR": "your-value"
      }
    }
  }
}

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "comfy-ui-builder": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-comfy-ui-builder"
      ],
      "env": {
        "COMFYUI_HOST": "your-value",
        "COMFYUI_PATH": "your-value",
        "COMFYUI_KNOWLEDGE_DIR": "your-value"
      }
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "comfy-ui-builder": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "mcp-comfy-ui-builder"
      ],
      "env": {
        "COMFYUI_HOST": "your-value",
        "COMFYUI_PATH": "your-value",
        "COMFYUI_KNOWLEDGE_DIR": "your-value"
      }
    }
  }
}

Values you fill in

COMFYUI_HOST env
ComfyUI API URL (e.g. http://127.0.0.1:8188). Required for execution, queue, outputs.
COMFYUI_PATH env
Path to ComfyUI install. Required for install_custom_node, install_model.
COMFYUI_KNOWLEDGE_DIR env
Path to knowledge directory (default: package knowledge/). Use when MCP runs from different cwd.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

At a glance

GitHub stars i: 4
Downloads per weeki: 173/wk
Licence i: MIT
Connection: Runs on your computer
Transport: stdio
Latest versioni: 2.4.1
Categoryi: Search & AI memory
Published to registryi: Feb 4, 2026
Code last changedi: Oct 31, 2026
Maker: MIt9
Packages: npm: mcp-comfy-ui-builder
Repo: MIt9/mcp-comfy-ui-builder
Registry status: Active

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Run on your computer in

Claude Goose LM Studio Msty Studio Cherry Studio Cursor VS Code + GitHub Copilot Visual Studio Windsurf (Devin Desktop)Zed Kiro Cline Continue JetBrains AI Assistant Claude Code Codex CLI Gemini CLI OpenCode nodecode Warp LibreChat Raycast

All apps, with pros and cons →

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 11, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account MIt9, which owns the repo
✓ Pass
Still maintained
Code last changed 12 days ago
✓ Pass
Has a licence
Uses MIT
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Discussion

Ask, share a tip or report that it does not work. Sorted by what people marked helpful.

No posts yet. Be the first to ask or share.

Posts here are written by users, not the PopNx team.

User reviews

No reviews yet

Compared with others in Search & AI memoryi

More stars than 87% of the other 5940 servers in this category
Published to the registry more recently than 2% of the other 5940 servers in this category
Basic checks equal to or better than 100% of the other 5940 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is ComfyUI Builder safe?

It passed 3 of 3 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed 12 days ago, and the latest version (2.4.1) reached the registry 9 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Ruflo, Context7, Metabase

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Ruflo

Agent teams, swarms, memory and hooks for Claude Code and Codex, served over MCP.

by ruvnetWidely used↓ 74.3K/wk★ 81.4KUpdated today

Runs on your computer

Install

Context7

Feeds AI the latest docs for libraries and frameworks before it answers, so code it writes does not use outdated, removed functions.

by upstashWidely used↓ 1.2M/wk★ 64.6KUpdated 2 days ago

Computer or cloud

Install

Metabase

Lets AI clients search, explore, query, and visualize data in a Metabase instance.

by metabaseWidely used★ 50.3KUpdated 6 months ago

Runs in the cloud

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

mcp-comfy-ui-builder

Control ComfyUI from Claude or Cursor — 50+ MCP tools for node discovery, dynamic workflow building, real-time WebSocket execution, and model management. No JSON editing required.

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.

Publishable to the MCP Registry via server.json and mcpName.

What is this

Knowledge base: Seed knowledge/base-nodes.json and node-compatibility.json from bundled data (62 seed nodes; 100–600+ after sync). No external services required for suggest/build.
Sync: Custom packs from ComfyUI-Manager; nodes from running ComfyUI via sync-nodes CLI or on MCP startup.
MCP server (50+ tools): Node discovery, dynamic workflow builder, 9 templates (txt2img, txt2img_flux, img2img, …), WebSocket real-time execution, batch/chain, model management, plugin system.
Real-time execution: Sub-second progress via WebSocket with automatic polling fallback; ~90% less network traffic for batch runs.

Install

npm install mcp-comfy-ui-builder

Or from source: git clone https://github.com/MIt9/mcp-comfy-ui-builder.git && cd mcp-comfy-ui-builder && npm install

Quick start

Build (postbuild fills knowledge from seed)

   npm run build

npm run mcp

Use knowledge in code

   import baseNodes from './knowledge/base-nodes.json' assert { type: 'json' };

Commands

Command	Description
`npm run seed`	Fill knowledge from seed. Use `--force` to overwrite.
`npm run sync-manager`	Update custom packs list from ComfyUI-Manager
`npm run sync-nodes`	Sync nodes from running ComfyUI to knowledge base (requires COMFYUI_HOST)
`npm test`	Run tests (vitest)
`npm run mcp`	Start MCP server (after `npm run build`)

Documentation

Single entry point — task-oriented navigation:

[doc/README.md](doc/README.md) — where to start, task-based navigation
[doc/INDEX.md](doc/INDEX.md) — complete list of documents and links
[doc/QUICK-REFERENCE.md](doc/QUICK-REFERENCE.md) — commands, examples, troubleshooting
[doc/GETTING-STARTED.md](doc/GETTING-STARTED.md) — quick start
[doc/MCP-SETUP.md](doc/MCP-SETUP.md) — connect MCP in Cursor/Claude
[doc/DOCKER-SETUP.md](doc/DOCKER-SETUP.md) — docker pull siniidrozd/mcp-comfy-ui-builder | docker-compose for MCP + ComfyUI
Knowledge base: knowledge/README.md, doc/knowledge-base-usage-guide.md
Workflow Builder: doc/workflow-builder.md — templates, params, save/load, ComfyUI format
Planning: ROADMAP.md, NEXT-STEPS.md, TODO.md — current v2.3.x, next Phase 10 (QoL)
Contributing: CONTRIBUTING.md
MCP Registry: server.json and mcpName in package.json; see MCP Registry quickstart to publish after npm publish.

Requirements

Node.js 18+

MCP Server (Cursor / Claude)

Server provides 50+ tools across 9 categories:

Core Features

Node Discovery:

list_node_types, get_node_info, check_compatibility, suggest_nodes
discover_nodes_live, search_nodes, sync_nodes_to_knowledge

Dynamic Workflow Builder:

create_workflow, add_node, connect_nodes, validate_workflow
Build workflows programmatically without JSON manipulation

Templates & Macros:

list_templates, build_workflow — Pre-built templates (txt2img, img2img, inpainting, upscale, LoRA, ControlNet, batch)
create_template, apply_template — Parameterized templates
list_macros, insert_macro — Reusable sub-workflows

Real-time execution 📡

execute_workflow_sync — Execute with WebSocket progress streaming (sub-second updates)
execute_workflow_stream — Full event history collection (WebSocket-only)
get_execution_progress — Real-time progress with node-level granularity
execute_batch — Concurrent execution with 90% reduced network traffic
execute_chain — Sequential workflows with data passing

Resources & Model Management:

get_system_resources — GPU/VRAM/RAM + recommendations (max resolution, model size, batch size); call first before building workflows to avoid OOM
list_models, check_model_exists, get_workflow_models
Supports checkpoint, lora, vae, controlnet, upscale, embedding, clip

Outputs & Queue:

list_outputs, download_output, download_all_outputs
list_queue, interrupt_execution, clear_queue

Plugins:

list_plugins, reload_plugins — Data-only plugin system

Install (requires COMFYUI_PATH):

install_custom_node, install_model — Install nodes and models via ComfyUI-Manager

WebSocket features

<100ms latency for progress updates (vs 1.5s polling)
Node-level tracking: See exactly which node is executing with progress percentage
Automatic fallback: Gracefully falls back to polling if WebSocket unavailable
Shared connection: Single WebSocket for batch/chain execution (90% reduced traffic)

Set COMFYUI_HOST environment variable for execution/model/output tools:

export COMFYUI_HOST="http://localhost:8188"

See doc/MCP-SETUP.md for full tool list and doc/WEBSOCKET-GUIDE.md for real-time features.

Running MCP

From project root, first build the project, then start the server:

npm run build

npm run mcp

Or without npm: node dist/mcp-server.js. Server works via stdio (stdin/stdout). More details → doc/MCP-SETUP.md.

Connect MCP (Cursor / Claude)

What you need: Node.js 18+, one-time build (npm run build), absolute path to dist/mcp-server.js, restart after config change. If the server fails to start with «spawn node ENOENT», use the full path to node in command (run which node and put that path). See doc/MCP-SETUP.md → Troubleshooting.

Minimal config (knowledge and workflow tools only):

"mcpServers": { "comfy-ui-builder": { "command": "node", "args": ["/ABSOLUTE/PATH/TO/mcp-comfy-ui-builder/dist/mcp-server.js"] } } }

Use full path in command (e.g. "/opt/homebrew/bin/node") if Cursor/IDE reports «spawn node ENOENT».

With ComfyUI execution (execute_workflow, get_execution_status, list_outputs, etc.): add "env": { "COMFYUI_HOST": "http://127.0.0.1:8188" } to the server block. See doc/MCP-SETUP.md for full checklist, optional env vars (COMFYUI_PATH, COMFYUI_KNOWLEDGE_DIR), and troubleshooting.

Publish on GitHub

Create a new repository on GitHub: name mcp-comfy-ui-builder, visibility Public (or Private). Do not initialize with README, .gitignore, or license (project already has them).
Add remote and push:

   git remote add origin https://github.com/MIt9/mcp-comfy-ui-builder.git

git branch -M main git push -u origin main

If you fork this repo, replace MIt9 with your GitHub username in the URLs above.

Cursor: Settings → MCP; Claude Desktop: config file ~/Library/Application Support/Claude/claude_desktop_config.json (macOS). Replace the path with your absolute path to dist/mcp-server.js, then restart the app. Full guide: doc/MCP-SETUP.md.

License

MIT

ComfyUI Builder

Overview

What you can do with it

Install

Install Node.js

Sign up and create a ComfyUI Builder key

Open the Claude desktop app’s settings file

Paste these settings and save the file

Quit Claude and open it again

Try it

What you can do instead

Install Node.js

Sign up and create a ComfyUI Builder key

Open Terminal

Paste this command and press Enter

Type /mcp in Claude Code

Try it

Install Node.js

Sign up and create a ComfyUI Builder key

Click this button to open Cursor

Fill in your key

Open the AI chat in Cursor in Agent mode

Try it

Install Node.js

Sign up and create a ComfyUI Builder key

Click this button to open VS Code

Fill in your key

Open the AI chat in VS Code in Agent mode

Try it

Installed on your computer

Values you fill in

At a glance

Which apps can use it

Related guides

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Discussion

User reviews

Compared with others in Search & AI memoryi

Common questions

Alternatives

Ruflo

Context7

Metabase

README from the maker

mcp-comfy-ui-builder

What is this

Install

Quick start

Commands

Documentation

Requirements

MCP Server (Cursor / Claude)

Core Features

WebSocket features

Running MCP

Connect MCP (Cursor / Claude)

Publish on GitHub

License