ComfyUI-ForgeAPI-for-InstantID-workflow

🎨 ComfyUI-ForgeUI-InstantID-compact-node

A ComfyUI node for controlling a local Forge UI / Automatic1111 WebUI via API.

This node bridges the gap between ComfyUI's workflow flexibility and Forge UI's superior implementation of specific ControlNet models. It is designed specifically for an InstantID + Canny ControlNet workflow on SDXL, allowing you to leverage Forge's robust rendering backend directly from your ComfyUI canvas.

🚀 Why use this?

While ComfyUI is a powerful platform, Forge UI often delivers superior results for InstantID. This node allows you to:

• Use Forge UI as a rendering engine for ComfyUI.
• Achieve high-quality results in under 8 steps (using dmd2_sdxl_4step_lora_fp16).
• Seamlessly map InstantID keypoints and Canny edges.

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✨ Key Features

• SDXL & InstantID Optimized: Pre-configured for high-performance face reference workflows.
• Robust Connectivity: The websocket client is configured to wait indefinitely for the render to finish, preventing timeouts during heavy generation tasks.
• Smart Image Handling: Automatically flattens alpha channels on pasted images to ensure consistent processing for ControlNet.
• Flexible LoRA Support: Defaults to 4-step LoRAs but supports full customization via dropdowns.

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🛠️ Requirements

1. Local Forge UI Instance

You must have a local instance of Forge UI (or Automatic1111) running.

• Default URL: http://127.0.0.1:7860

• Flag: You must launch Forge with the API enabled:

  python launch.py --api

2. Required Models

Place the following models in your Forge UI models/ControlNet/ directory:

| Model Type | Filename | Description | | :--- | :--- | :--- | | IP-Adapter | ip-adapter_instant_id_sdxl.safetensors | The InstantID adapter. | | ControlNet | control_instant_id_sdxl.safetensors | Handles InstantID keypoints. | | ControlNet | diffusers_xl_canny_full.safetensors | Handles Canny edge detection. |

⚠️ Note: This node connects to your external Forge UI instance. These models must be installed in Forge, not just ComfyUI.

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⚡ Quick Start Guide

1. Launch Forge UI: Run your local Forge instance with the API flag.

   python launch.py --api
   

2. Start ComfyUI: Open ComfyUI and load your workflow.
3. Add the Node: Search for and add the Local Forge UI Controller node.
4. Configure:
   • Select your models from the dropdowns (these are auto-detected from your running Forge instance).
   • Load your instantid_image (Face Reference) and canny_image (Edge Reference).
5. Run: Connect your output and queue the prompt.

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🎛️ Node Parameters

Required Settings

| Parameter | Description | | :--- | :--- | | forge_url | The API URL for Forge (Default: http://127.0.0.1:7860). | | instantid_model | Select the IP-Adapter model (e.g., ip-adapter_instant_id_sdxl). | | instantid_keypoints_model | Select the Keypoints model. | | canny_model | Select the Canny ControlNet model. | | prompt / negative | Your text prompts for generation. | | steps | Recommended: 8-12. (8 for speed, 12 for quality). | | lora_tag | The LoRA used for acceleration (e.g., dmd2_sdxl_4step). |

Optional Inputs

• instantid_image: The reference image for facial identity.
• canny_image: The reference image for composition/edges.
• weights: Fine-tune the influence of InstantID or Canny (0.0 to 2.0).

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❓ Troubleshooting

Failed to Connect?

• Ensure Forge UI is running.
• Verify you started Forge with --api.
• Check that forge_url matches your local address.

No Images Returned?

• Verify that all required .safetensors are inside the Forge models/ControlNet/ folder.
• Ensure the models appear in the dropdown lists.

Dropdowns showing defaults/empty?

• Restart Order: You must start Forge UI before starting ComfyUI (or reload the ComfyUI browser tab) so the node can fetch the model list.

Manual API Check: You can verify the API is accessible by running this command in PowerShell:

Invoke-WebRequest [http://127.0.0.1:7860/controlnet/model_list](http://127.0.0.1:7860/controlnet/model_list) | Select-Object -Expand Content