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Worker secrets (set via
Worker vars (in
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Remote MCP server for RunComfy Serverless API (ComfyUI): deployments and async inference.
About
Remote MCP server for RunComfy Serverless API (ComfyUI): deployments and async inference.
Remote endpoints: streamable-http: https://mcp.runcomfy.com/mcp
Security Report
4.8
Use Caution4.8High RiskRunComfy MCP server is a well-architected API client wrapper with proper authentication design and appropriate permission scoping. The server correctly forwards caller credentials through a context variable system, implements proper error handling, and has no malicious patterns or dangerous code execution. Minor code quality observations exist but do not materially impact security. Supply chain analysis found 6 known vulnerabilities in dependencies (0 critical, 2 high severity).
5 files analyzed · 10 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
How to Install & Connect
Available as Local & Remote
This plugin can run on your machine or connect to a hosted endpoint. during install.
Documentation
View on GitHubFrom the project's GitHub README.
RunComfy MCP
MCP server for the RunComfy Serverless API (ComfyUI). Manage deployments, run inference, and retrieve results from AI assistants like Claude, Cursor, and Windsurf.
Endpoint: https://mcp.runcomfy.com/mcp
Docs: docs.runcomfy.com/mcp
What it does
10 tools that mirror docs.runcomfy.com/serverless 1:1:
| Category | Tools |
|---|---|
| Deployment management | list_deployments, get_deployment, create_deployment, update_deployment, delete_deployment |
| Inference | submit_request, get_request_status, get_request_result, cancel_request |
| Advanced | call_instance_proxy |
Quick setup
Claude Code
claude mcp add runcomfy \
--transport streamable-http \
https://mcp.runcomfy.com/mcp \
--header "Authorization: Bearer <YOUR_RUNCOMFY_TOKEN>"
Cursor
Add to .cursor/mcp.json:
{
"mcpServers": {
"runcomfy": {
"url": "https://mcp.runcomfy.com/mcp",
"headers": {
"Authorization": "Bearer <YOUR_RUNCOMFY_TOKEN>"
}
}
}
}
Windsurf
Add to Windsurf Settings > MCP:
{
"mcpServers": {
"runcomfy": {
"serverUrl": "https://mcp.runcomfy.com/mcp",
"headers": {
"Authorization": "Bearer <YOUR_RUNCOMFY_TOKEN>"
}
}
}
}
Get your API token from your Profile page.
Architecture
MCP Client ──Bearer token──> Cloudflare Worker (/mcp)
│
▼
Cloudflare Container
(Python FastMCP app)
│
▼
api.runcomfy.net
(using caller's token)
- Cloudflare Worker (
src/index.ts) — thin proxy: CORS, body size check, forwards the caller's token to the container. No auth logic —api.runcomfy.nethandles authentication. - Python container (
server.py) — FastMCP app with 10 tools. Uses the caller's token (forwarded viax-runcomfy-user-tokenheader) for all outbound API calls. Each user sees only their own deployments. - Cloudflare Container auto-starts on first request, sleeps after 10 minutes idle.
Project layout
src/index.ts Cloudflare Worker entrypoint
server.py MCP tool definitions (10 tools)
runcomfy_client.py RunComfy API client (serverless endpoints)
container_app.py ASGI middleware (request IDs, token forwarding)
container_entrypoint.py Uvicorn startup
container_runtime.py Env validation, structured logging
wrangler.jsonc Cloudflare Worker + Container config
Dockerfile Container image
.env.example Local dev config
Local development
# Python 3.11+
python3.11 -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt
cp .env.example .env
# Set RUNCOMFY_API_KEY in .env
python -m container_entrypoint
Local endpoints:
http://127.0.0.1:8000/healthzhttp://127.0.0.1:8000/mcp
In local mode (no Worker), the Python app uses RUNCOMFY_API_KEY from .env for all outbound calls.
Deploy
Requires Cloudflare Workers Paid plan with Containers enabled.
npm install
# Set the API key secret (one-time)
npx wrangler secret put RUNCOMFY_API_KEY
# Deploy
CLOUDFLARE_ACCOUNT_ID=<your-account-id> npx wrangler deploy
The MCP endpoint goes live at https://mcp.runcomfy.com/mcp (custom domain configured in wrangler.jsonc).
Environment variables
Worker secrets (set via wrangler secret put)
| Name | Required | Description |
|---|---|---|
RUNCOMFY_API_KEY | Yes | Fallback API key for the container |
Worker vars (in wrangler.jsonc)
| Name | Default | Description |
|---|---|---|
CONTAINER_INSTANCE_NAME | runcomfy-unified | Durable Object instance name |
CONTAINER_STARTUP_TIMEOUT_MS | 15000 | Max wait for container start |
CONTAINER_PORT_READY_TIMEOUT_MS | 30000 | Max wait for port ready |
MCP_MAX_BODY_BYTES | 1048576 | Max request body size |
RUNCOMFY_SERVERLESS_BASE_URL | https://api.runcomfy.net | Serverless API base URL |
Local dev (.env file)
| Name | Required | Description |
|---|---|---|
RUNCOMFY_API_KEY | Yes | Your RunComfy API token |
RUNCOMFY_SERVERLESS_BASE_URL | No | Override base URL (default: https://api.runcomfy.net) |
RUNCOMFY_MCP_MOUNT_PREFIX | No | Path prefix for MCP mount (default: empty) |
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