Tutorial: Four Steps for Claude to Direct ComfyUI Drawing via MCP教程：四步让 Claude 通过 MCP 直接指挥 ComfyUI 出图

Open the native ComfyUI (default http://127.0.0.1: 8188) and confirm that the default workflow can produce a diagram - this is the premise of everything later.

Save the workflow you want to expose to the agent as JSON in ComfyUI (just export it in the menu), such as Flux workflow of Vincent diagram. The official workflows/directory also comes with multiple off-the-shelf workflows that can be imported directly.

The model recommends verifying the link with small parameters (512 × 512, low steps) first, and then uploading the large model after running through to avoid card memory at the beginning.

Download our site pixelle-mcp-main.zip (5.82 MB) and extract it. After entering the directory, press README_CN.md to install the dependency (uv sync or pip install -e. is recommended).

Copy the .env.example to .env, fill in the ComfyUI access address and output directory, etc.; the first start will automatically scan the available workflows.

After starting the service, the browser opens the WebUI to confirm that the home page is normal, and the SSE endpoint defaults to http://localhost: 8002/sse.

Put your workflow JSON in the WebUI or workflows directory, and Pixelle will parse the nodes and derive parameters: prompts, width and height, steps, etc. will automatically become tool input parameters.

Connect the SSE endpoint with the MCP Inspector (npx @ modelcontextprotocol/inspector) Validation: List Tools should see the tool named after the workflow, with the type and description of each parameter, and the point Run Tool can be directly plotted.

The official screenshot shows this step: the left Inspector lists the t2i_by_flux_model tool, the right is its corresponding ComfyUI workflow, and the parameters have been automatically mapped.

Execute claude mcp add -s user pixelle --transport sse http://localhost: 8002/sse in Claude Code. After restarting the session, Claude can see all the tools of pixelle.

Try saying "Draw a 1024 wide cyberpunk cat with a flux workflow" - Claude will call the corresponding tool, pass the parameters, and retrieve the generated graph. Tusheng videos, TTS and other workflows are the same, you can adjust what you register.

It is recommended to centralize the commonly used workflows in a directory and write the names. The agent picks the tools by name, which is more accurate; confirm that the ComfyUI queue is not piled up in the event of a timeout.