ComfyUI Builder
Hooks Claude directly into ComfyUI's node system and execution engine. You get 50+ tools spanning node discovery, a dynamic workflow builder, nine templates (txt2img, img2img, ControlNet, etc.), and real-time WebSocket execution with sub-second progress updates. Seeds a local knowledge base of ComfyUI nodes that syncs from running instances or ComfyUI-Manager packs. Handles model management, queue control, batch runs, and output downloads. The workflow builder lets you assemble pipelines programmatically instead of hand-editing JSON. Useful when you're prototyping image generation flows in Claude and want to execute them against a local ComfyUI server without context-switching to the web UI.
- GitHub stars
- 2
- tools
- 36
- transport
- STDIO
- env vars
- 3
- last updated
- Feb 3, 2026
Tools
36 toolsPublic tool metadata for what this MCP can expose to an agent.
list_node_typesNode Discovery tool listing ComfyUI node types.
Node Discovery tool listing ComfyUI node types.
No parameter schema in public metadata yet.
get_node_infoReturns information about a specific ComfyUI node.
Returns information about a specific ComfyUI node.
No parameter schema in public metadata yet.
check_compatibilityChecks compatibility between ComfyUI nodes.
Checks compatibility between ComfyUI nodes.
No parameter schema in public metadata yet.
suggest_nodesSuggests nodes for a workflow.
Suggests nodes for a workflow.
No parameter schema in public metadata yet.
discover_nodes_liveDiscovers nodes from a running ComfyUI instance.
Discovers nodes from a running ComfyUI instance.
No parameter schema in public metadata yet.
search_nodesSearches ComfyUI nodes.
Searches ComfyUI nodes.
No parameter schema in public metadata yet.
sync_nodes_to_knowledgeSyncs nodes into the knowledge base.
Syncs nodes into the knowledge base.
No parameter schema in public metadata yet.
create_workflowCreates a workflow programmatically.
Creates a workflow programmatically.
No parameter schema in public metadata yet.
add_nodeAdds a node to a workflow.
Adds a node to a workflow.
No parameter schema in public metadata yet.
connect_nodesConnects nodes in a workflow.
Connects nodes in a workflow.
No parameter schema in public metadata yet.
validate_workflowValidates a workflow.
Validates a workflow.
No parameter schema in public metadata yet.
list_templatesLists pre-built workflow templates.
Lists pre-built workflow templates.
No parameter schema in public metadata yet.
build_workflowBuilds a workflow from a template.
Builds a workflow from a template.
No parameter schema in public metadata yet.
create_templateCreates a parameterized template.
Creates a parameterized template.
No parameter schema in public metadata yet.
apply_templateApplies a parameterized template.
Applies a parameterized template.
No parameter schema in public metadata yet.
list_macrosLists reusable sub-workflows.
Lists reusable sub-workflows.
No parameter schema in public metadata yet.
insert_macroInserts a reusable sub-workflow.
Inserts a reusable sub-workflow.
No parameter schema in public metadata yet.
execute_workflow_syncExecutes a workflow with WebSocket progress streaming.
Executes a workflow with WebSocket progress streaming.
No parameter schema in public metadata yet.
execute_workflow_streamExecutes a workflow collecting full event history via WebSocket.
Executes a workflow collecting full event history via WebSocket.
No parameter schema in public metadata yet.
get_execution_progressReturns real-time progress with node-level granularity.
Returns real-time progress with node-level granularity.
No parameter schema in public metadata yet.
execute_batchExecutes workflows concurrently.
Executes workflows concurrently.
No parameter schema in public metadata yet.
execute_chainExecutes sequential workflows with data passing.
Executes sequential workflows with data passing.
No parameter schema in public metadata yet.
get_system_resourcesReturns GPU/VRAM/RAM info and recommendations.
Returns GPU/VRAM/RAM info and recommendations.
No parameter schema in public metadata yet.
list_modelsLists installed models.
Lists installed models.
No parameter schema in public metadata yet.
check_model_existsChecks whether a model exists.
Checks whether a model exists.
No parameter schema in public metadata yet.
get_workflow_modelsReturns models used by a workflow.
Returns models used by a workflow.
No parameter schema in public metadata yet.
list_outputsLists generated outputs.
Lists generated outputs.
No parameter schema in public metadata yet.
download_outputDownloads an output.
Downloads an output.
No parameter schema in public metadata yet.
download_all_outputsDownloads all outputs.
Downloads all outputs.
No parameter schema in public metadata yet.
list_queueLists the execution queue.
Lists the execution queue.
No parameter schema in public metadata yet.
interrupt_executionInterrupts the current execution.
Interrupts the current execution.
No parameter schema in public metadata yet.
clear_queueClears the execution queue.
Clears the execution queue.
No parameter schema in public metadata yet.
list_pluginsLists data-only plugins.
Lists data-only plugins.
No parameter schema in public metadata yet.
reload_pluginsReloads plugins.
Reloads plugins.
No parameter schema in public metadata yet.
install_custom_nodeInstalls a custom node via ComfyUI-Manager.
Installs a custom node via ComfyUI-Manager.
No parameter schema in public metadata yet.
install_modelInstalls a model via ComfyUI-Manager.
Installs a model via ComfyUI-Manager.
No parameter schema in public metadata yet.
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COMFYUI_HOSTComfyUI API URL (e.g. http://127.0.0.1:8188). Required for execution, queue, outputs.
COMFYUI_PATHPath to ComfyUI install. Required for install_custom_node, install_model.
COMFYUI_KNOWLEDGE_DIRPath to knowledge directory (default: package knowledge/). Use when MCP runs from different cwd.
Readme
mcp-comfy-ui-builder
Control ComfyUI from Claude or Cursor — 50+ MCP tools for node discovery, dynamic workflow building, real-time WebSocket execution, and model management. No JSON editing required.
Tell your AI assistant what image to generate — it builds and runs the ComfyUI workflow for you.
Works with Claude Desktop, Cursor, and any MCP-compatible client.
Demo
Publishable to the MCP Registry via server.json and mcpName.
What is this
Details
- Repository
- github.com/mit9/mcp-comfy-ui-builder
- Categories
- Documents & Knowledge, Automation & Workflows
- Package
mcp-comfy-ui-builder- Transport
- STDIO
- Registry
- MCP registry, active
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