dcc-mcp-comfyui

DCC-MCP · COMFYUI

Production ComfyUI adapter for the DCC Model Context Protocol (MCP) ecosystem. It gives agents a typed, bounded path from API-format workflow validation to queue execution and artifact delivery through ComfyUI's local REST API.

Validate, execute, and deliver a ComfyUI workflow

Illustrative workflow generated with OpenAI ImageGen from the retained source in docs/assets/sources; it depicts only the implemented validation, queue, polling, and artifact-delivery path.

Capabilities

  • Workflow validation checks API-format structure, graph references, live node classes, and required inputs before queue submission.
  • Catalog discovery exposes bounded features, models, embeddings, node summaries, exact node contracts, and redacted device/runtime status.
  • Queue operations inspect IDs without workflow bodies, target one exact prompt for cancellation or history deletion, and verify the resulting state; running cancellation fails closed instead of falling back to ComfyUI's legacy global interrupt.
  • Asset handoff uploads bounded images with SHA-256 provenance and atomically downloads only artifacts proven to belong to the requested prompt.
  • Artifact discovery is shape-based rather than tied to English labels or an image-only key, so file-shaped image, animation, video, audio, 3D, and custom-node outputs share one bounded contract.
  • Standalone discovery, packaged Skill subprocesses, and six-part DCC-MCP readiness are supported out of the box.

The production path was live-validated on ComfyUI 0.32.0 with a three-node EmptyImage -> ImageInvert -> SaveImage workflow, including typed validation, execution, status polling, and artifact retrieval.

Quick Start

# Install
pip install dcc-mcp-comfyui

# Start ComfyUI locally (in another terminal)
python main.py --listen 127.0.0.1

# Start the MCP server
dcc-mcp-comfyui --comfyui-base-url http://127.0.0.1:8188

Environment Variables

Variable Default Description
DCC_MCP_COMFYUI_BASE_URL http://127.0.0.1:8188 ComfyUI server URL
DCC_MCP_COMFYUI_TIMEOUT 120 Request timeout (seconds)
DCC_MCP_COMFYUI_PORT OS-assigned MCP instance port
DCC_MCP_GATEWAY_PORT 9765 Gateway port
DCC_MCP_COMFYUI_ENABLE_GATEWAY_FAILOVER true Gateway failover

Skills

The wheel includes four validated Skills and 17 typed tools:

Skill Tools Boundary
comfyui-workflow 4 Validate, submit, monitor, and resolve exact prompt-owned artifacts
comfyui-catalog 7 Features, model folders, models, embeddings, node summaries/contracts, and redacted runtime status
comfyui-queue 4 Redacted queue inspection, exact cancellation/history deletion, and memory reclamation
comfyui-assets 2 Bounded image upload and atomic prompt-owned artifact download

The public surface does not expose arbitrary Python, raw process arguments, local ComfyUI install paths, bulk queue deletion, or unbounded catalog dumps.

MCP Client Config

{
  "mcpServers": {
    "dcc-mcp-comfyui": {
      "url": "http://127.0.0.1:9765/mcp"
    }
  }
}

Build & Test

uv pip install -e ".[dev]"
uv run pytest
uv run ruff check src/ tests/

Architecture

MCP Client → Gateway (:9765) → ComfyUiMcpServer (OS port)
    └─ Skill scripts → ComfyUIBridge → ComfyUI REST API (:8188)

License

MIT

Project links

Data verified by PyPI on Aug 13, 2026
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  • Released:
Newer release available (0.1.4)

1 maintainer

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Avatar for hao.long from gravatar.com hao.long

Credits

Author: Long Hao

GitHub Statistics

Data verified by PyPI on Aug 13, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License

MIT License (MIT)

Requires

Python >=3.10

Provides Extra

dev

Tags

ai comfyui dcc llm mcp model-context-protocol stable-diffusion workflow

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