ComfyUI Light MCP

Local install

io.github.yuchen-ya/comfyui-light-mcpv0.3.0-rc.2.1 GitHub verified

Workflow-first, Batch-native, Context-light.

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{
  "_meta": {
    "io.modelcontextprotocol.registry/official": {
      "status": "active",
      "isLatest": true,
      "updatedAt": "2026-11-11T12:51:00.289353Z",
      "publishedAt": "2026-11-11T12:51:00.289353Z",
      "statusChangedAt": "2026-11-11T12:51:00.289353Z"
    }
  },
  "server": {
    "name": "io.github.yuchen-ya/comfyui-light-mcp",
    "title": "ComfyUI Light MCP",
    "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
    "version": "0.3.0-rc.2.1",
    "packages": [
      {
        "version": "0.3.0-rc.2",
        "transport": {
          "type": "stdio"
        },
        "identifier": "comfyui-light-mcp",
        "runtimeHint": "npx",
        "registryType": "npm",
        "registryBaseUrl": "https://registry.npmjs.org",
        "runtimeArguments": [
          {
            "name": "--package",
            "type": "named",
            "value": "[email protected]"
          }
        ],
        "environmentVariables": [
          {
            "name": "COMFYUI_URL",
            "format": "string",
            "isRequired": true,
            "description": "Required installation choice: your trusted running ComfyUI HTTP(S) endpoint. No credentials, query or fragment.",
            "placeholder": "http://127.0.0.1:8188"
          },
          {
            "name": "WORKFLOWS_DIR",
            "format": "filepath",
            "isRequired": true,
            "description": "Required absolute existing directory containing your reviewed workflow API JSON and manifest pairs.",
            "placeholder": "C:/mcp/workflows"
          },
          {
            "name": "DATA_DIR",
            "format": "filepath",
            "isRequired": true,
            "description": "Required absolute writable SQLite state directory. Use a separate directory per MCP process.",
            "placeholder": "C:/mcp/data"
          },
          {
            "name": "OUTPUT_DIR",
            "format": "filepath",
            "isRequired": true,
            "description": "Required absolute writable output/download/index directory.",
            "placeholder": "C:/mcp/output"
          },
          {
            "name": "AUTO_SAVE_OUTPUTS",
            "format": "boolean",
            "default": "true",
            "description": "Application default: true. Download outputs on completion; false defers downloads to result queries."
          },
          {
            "name": "MAX_IN_FLIGHT",
            "format": "number",
            "default": "1",
            "description": "Application default: 1. Integer 1-64; includes uncertain submissions."
          },
          {
            "name": "MAX_QUEUED_JOBS",
            "format": "number",
            "default": "1",
            "description": "Application default: 1. Integer 1-64, no greater than MAX_IN_FLIGHT."
          },
          {
            "name": "JOB_TIMEOUT_MS",
            "format": "number",
            "default": "600000",
            "description": "Application default: 600000. Integer 10000-86400000 milliseconds."
          }
        ]
      }
    ],
    "repository": {
      "url": "https://github.com/yuchen-ya/comfyui-light-mcp",
      "source": "github"
    },
    "description": "Workflow-first, Batch-native, Context-light."
  }
}

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Try it

This server only runs locally, from a package. Install it with the instructions on this page to try it.

Install

Pick your client. Values in capitals, like YOUR_TOKEN, are yours to fill in.

One click: Add to Cursor Add to VS Code Add to LM StudioThen replace the YOUR_ values and {placeholders} with your own.

Run in a terminal

claude mcp add comfyui-light-mcp \
  -e COMFYUI_URL=YOUR_COMFYUI_URL \
  -e WORKFLOWS_DIR=YOUR_WORKFLOWS_DIR \
  -e DATA_DIR=YOUR_DATA_DIR \
  -e OUTPUT_DIR=YOUR_OUTPUT_DIR \
  -- npx -y [email protected]

Environment

COMFYUI_URL (required): Required installation choice: your trusted running ComfyUI HTTP(S) endpoint. No credentials, query or fragment.
WORKFLOWS_DIR (required): Required absolute existing directory containing your reviewed workflow API JSON and manifest pairs.
DATA_DIR (required): Required absolute writable SQLite state directory. Use a separate directory per MCP process.
OUTPUT_DIR (required): Required absolute writable output/download/index directory.
AUTO_SAVE_OUTPUTS (optional, not in the config above): Application default: true. Download outputs on completion; false defers downloads to result queries.
MAX_IN_FLIGHT (optional, not in the config above): Application default: 1. Integer 1-64; includes uncertain submissions.
MAX_QUEUED_JOBS (optional, not in the config above): Application default: 1. Integer 1-64, no greater than MAX_IN_FLIGHT.
JOB_TIMEOUT_MS (optional, not in the config above): Application default: 600000. Integer 10000-86400000 milliseconds.

Tools

We don't run packages, so we can't list this server's tools.

Install

Pick your client. Values in capitals, like YOUR_TOKEN, are yours to fill in.

One click: Add to Cursor Add to VS Code Add to LM StudioThen replace the YOUR_ values and {placeholders} with your own.

Run in a terminal

claude mcp add comfyui-light-mcp \
  -e COMFYUI_URL=YOUR_COMFYUI_URL \
  -e WORKFLOWS_DIR=YOUR_WORKFLOWS_DIR \
  -e DATA_DIR=YOUR_DATA_DIR \
  -e OUTPUT_DIR=YOUR_OUTPUT_DIR \
  -- npx -y [email protected]

Environment

COMFYUI_URL (required): Required installation choice: your trusted running ComfyUI HTTP(S) endpoint. No credentials, query or fragment.
WORKFLOWS_DIR (required): Required absolute existing directory containing your reviewed workflow API JSON and manifest pairs.
DATA_DIR (required): Required absolute writable SQLite state directory. Use a separate directory per MCP process.
OUTPUT_DIR (required): Required absolute writable output/download/index directory.
AUTO_SAVE_OUTPUTS (optional, not in the config above): Application default: true. Download outputs on completion; false defers downloads to result queries.
MAX_IN_FLIGHT (optional, not in the config above): Application default: 1. Integer 1-64; includes uncertain submissions.
MAX_QUEUED_JOBS (optional, not in the config above): Application default: 1. Integer 1-64, no greater than MAX_IN_FLIGHT.
JOB_TIMEOUT_MS (optional, not in the config above): Application default: 600000. Integer 10000-86400000 milliseconds.

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