How do I connect Comfyui MCP Server to Claude?

Run `claude mcp add comfyui-mcp -- npx -y comfyui-mcp@latest --tunnel` in Claude Code, or add the same command and arguments under mcpServers in Cursor's mcp.json or Claude Desktop's claude_desktop_config.json, then restart the client. The blocks above are ready to paste.

Is Comfyui MCP Server free?

The listed licence is MIT. Check the upstream terms for permitted use and commercial requirements; a public repository does not by itself mean the software is free or open source. Connected APIs and hosted services may have separate charges.

What can Comfyui MCP Server do?

Comfyui MCP Server documents 12 tools to the agent, including clear_vram, comfy_cli, create_workflow. The descriptions above come from project documentation. A live handshake does not test individual tool behavior.

Comfyui MCP

Unclaimed

by artokun

Local-first, agent-native control plane for ComfyUI — MCP server + sidebar agent that generates images, video & audio, authors and runs workflows, and edits your live graph in natural language on ANY LLM (Claude, ChatGPT, Gemini, offline Ollama, or any hosted model). 178 tools, 36 AI skills, 55 installer packs. Local, LAN, VPS, or Comfy Cloud.

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01 / Choose your client

02 / Before you connect

Authentication is not specified. Check the project instructions before connecting.

Install the runtime required by the project and make it available to your client.

Project instructionsEnvironment variable names (optional)

Use names from the project instructions, separated by commas. Enter names only, never secret values.

03 / Add the configuration

Source: generated from public install instructions

claude mcp add --transport stdio 'comfyui-mcp' -- 'npx' '-y' 'comfyui-mcp@latest' '--tunnel'

Run in your terminal after replacing any placeholders.

04 / Check it in your client

Open your client’s MCP settings and confirm the server connects and lists its tools. A copied configuration does not confirm a working connection.

agent-skillsai-agentclaude-codeclaude-plugincomfyuicomfyui-extensioncomfyui-mcpcomfyui-mcp-serverfluximage-generationlocal-firstmcpmcp-servermodel-context-protocolofflineollamaself-hostedstable-diffusionvideo-generationwan

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12 of 12 tools

Documented tools (12)

From project documentation. A server handshake does not verify each tool’s description or behavior.

clear_vram

Free GPU VRAM by unloading cached models — calls ComfyUI's /free endpoint, reports before/after stats

comfy_cli

Search actual loaded node classes through official comfy nodes search (action:"searchnodes")

create_workflow

One action-parameterized tool for authoring: create (from templates: txt2img, img2img, upscale, inpaint, controlnet, ipadapter, acestep15, stableaudio3), modify (operations: setinput, addnode, removenode, connect, insertbetween), validate (dry-run — missing nodes, broken connections, invalid output

download_model

Find and fetch model weights, and track the transfers. action: download (from a URL, into the correct ComfyUI subdirectory), status, cancel, search (HuggingFace), searchcivitai, searchcreators, downloadcivitai, resolvemissing

get_system_stats

Get system info — GPU, VRAM, Python version, OS

get_workflow

One action-parameterized tool for READING a saved workflow file: list (the user library, subfolders included), get (one workflow's JSON by filename), analyze (a structured summary instead of raw JSON), query (filter/traverse/aggregate a big graph without dumping it), strip (de-virtualize any workflo

list_local_models

What is installed, and where ComfyUI looks. action: list (installed models by type: checkpoints, loras, vae, upscalemodels, controlnet, embeddings, clip, unet, diffusionmodels, textencoders), remove (deletes a model file), embeddings, listpaths, addpath, removepath (the last three view/edit the extr

queue

One action-parameterized tool for the execution queue: list (running + pending), status (one job by prompt ID), getworkflow (a pending job's full payload), move/edit (requeue a pending job front/back, patched or replaced, with a new prompt ID), cancel (interrupt the running job — escalates interrupt

save_workflow

One action-parameterized tool for WRITING to the library: save (store a workflow — overwrites a same-filename file), lock (record a provenance lock: SHA-256 per model, git commit per node pack), verifylock (report drift against that lock)

search_custom_nodes

Search the ComfyUI Registry for node packs by keyword (action: "search"), or get one pack's full details (action: "details")

upload_image

Copy a local image into ComfyUI's input/ directory for img2img, inpaint, or ControlNet

visualize_workflow

One action-parameterized tool for rendering and converting a workflow you pass in: render (Mermaid flowchart, nodes grouped by category), renderhierarchical (the same graph sectioned — overview, one section in detail, a listing, or an AI-oriented summary), mermaid (a Mermaid diagram back to executab

Tool change history

Compared across complete checks of the same configuration. Tools were listed, not invoked. Input-schema changes are not measured here.

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FAQ

Questions about Comfyui MCP Server

How do I connect Comfyui MCP Server to Claude?: Run `claude mcp add comfyui-mcp -- npx -y comfyui-mcp@latest --tunnel` in Claude Code, or add the same command and arguments under mcpServers in Cursor's mcp.json or Claude Desktop's claude_desktop_config.json, then restart the client. The blocks above are ready to paste.
Is Comfyui MCP Server free?: The listed licence is MIT. Check the upstream terms for permitted use and commercial requirements; a public repository does not by itself mean the software is free or open source. Connected APIs and hosted services may have separate charges.
What can Comfyui MCP Server do?: Comfyui MCP Server documents 12 tools to the agent, including clear_vram, comfy_cli, create_workflow. The descriptions above come from project documentation. A live handshake does not test individual tool behavior.