comfyui-ex

n8n node to integrate with ComfyUI stable diffusion workflows

Package Information

Downloads: 4 weekly / 44 monthly
Latest Version: 0.0.11
Author: mason276752

Available Nodes

ComfyUI icon
ComfyUI
Generate images using ComfyUI

Documentation

Banner image

n8n-nodes-comfyui-ex

This package provides n8n nodes to integrate with ComfyUI - A powerful and modular stable diffusion GUI with a graph/nodes interface.

Features

  • Execute ComfyUI workflows directly from n8n
  • Support for workflow JSON import
  • Automatic image retrieval from workflow outputs
  • Progress monitoring and error handling
  • Support for API key authentication
  • Configurable timeout settings

Prerequisites

  • n8n (version 1.0.0 or later)
  • ComfyUI instance running and accessible
  • Node.js 16 or newer

Installation

npm install n8n-nodes-comfyui-ex

Node Configuration

ComfyUI Node

This node allows you to execute ComfyUI workflows and retrieve generated images.

Settings

  • API URL: The URL of your ComfyUI instance (default: http://127.0.0.1:8188)
  • API Key: Optional API key if authentication is enabled
  • Workflow JSON: The ComfyUI workflow in JSON format

Outputs

The node outputs an array of generated images with:

  • filename: Name of the generated image file
  • subfolder: Subfolder path if any
  • data: Base64 encoded image data

Usage Example

  1. Export your workflow from ComfyUI as JSON
  2. Create a new workflow in n8n
  3. Add the ComfyUI node
  4. Paste your workflow JSON
  5. Configure the API URL
  6. Execute and retrieve generated images

Error Handling

The node includes comprehensive error handling for:

  • API connection issues
  • Invalid workflow JSON
  • Execution failures
  • Timeout conditions (default 20 minutes)

Development

# Install dependencies
pnpm install

# Build
pnpm build

# Test
pnpm test

# Integration test
pnpm test:integration

# Lint
pnpm lint

pnpm test:integration builds this package, builds an n8n test image with the local node installed, starts n8n plus ComfyUI through Docker Compose, and verifies:

  • n8n responds on /healthz/readiness
  • ComfyUI responds on /system_stats
  • n8n loads the ComfyUI node type in a fixture workflow
  • the n8n container can reach ComfyUI by Compose service name

Default images:

  • docker.n8n.io/n8nio/n8n:2.20.6
  • ghcr.io/ai-dock/comfyui:cpu-22.04

Overrides:

N8N_IMAGE=docker.n8n.io/n8nio/n8n:2.20.6 \
COMFYUI_IMAGE=ghcr.io/ai-dock/comfyui:cpu-22.04 \
pnpm test:integration

First run pulls the ComfyUI CPU image and can take several minutes.

License

MIT

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