MCP n8n Builder

Create, validate, and cost-estimate n8n workflows with AI. One MCP server, three powerful tools.

Quick Start

npm install @flipfactory/mcp-n8n

Add to your Claude Desktop config:

{
  "mcpServers": {
    "n8n": {
      "command": "npx",
      "args": ["@flipfactory/mcp-n8n"]
    }
  }
}

Optionally connect to a live n8n instance:

{
  "mcpServers": {
    "n8n": {
      "command": "npx",
      "args": ["@flipfactory/mcp-n8n"],
      "env": {
        "N8N_BASE_URL": "https://n8n.example.com",
        "N8N_API_KEY": "your-api-key"
      }
    }
  }
}

Tools

| Tool | Description | |------|-------------| | n8n_create | Generate a valid n8n workflow JSON from a natural-language description | | n8n_validate | Validate an n8n workflow JSON for errors, warnings, and best practices | | n8n_estimate_cost | Estimate the monthly running cost of an n8n workflow |

Node Templates

The n8n_create tool includes built-in templates for common nodes:

| Template | n8n Node Type | |----------|--------------| | scheduleTrigger | Schedule Trigger (cron) | | webhookTrigger | Webhook | | manualTrigger | Manual Trigger | | httpRequest | HTTP Request | | set | Set Data | | code | Code (JavaScript) | | if | IF (condition) | | switch | Switch | | claude | Claude API (via HTTP Request) | | openai | OpenAI API (via HTTP Request) | | respondToWebhook | Respond to Webhook | | sendEmail | Send Email | | telegram | Telegram | | postgres | PostgreSQL | | errorTrigger | Error Trigger |

Configuration

| Variable | Required | Description | |----------|----------|-------------| | N8N_BASE_URL | No | n8n instance URL (for future deploy features) | | N8N_API_KEY | No | n8n API key (for future deploy features) |

Examples

Create a workflow

"Build a workflow that runs daily, calls Claude API, and sends results to Telegram"
-> n8n_create(description: "Schedule trigger daily, call Claude API, send to Telegram")

Create with specific nodes

"Create a webhook workflow with data transformation"
-> n8n_create(description: "Webhook API", nodes: ["webhookTrigger", "httpRequest", "set", "respondToWebhook"])

Validate a workflow

"Check if this workflow JSON is valid"
-> n8n_validate(workflow: '{"name":"My Workflow","nodes":[...],...}')

Estimate cost

"How much will this workflow cost to run?"
-> n8n_estimate_cost(workflow: '...', executionsPerDay: 10, avgItemsPerExecution: 5)

Development

npm install
npm run dev      # Watch mode
npm test         # Run tests
npm run build    # Compile TypeScript

Pricing

$9/mo on Smithery

License

MIT — FlipFactory