Implement n8n-MCP integration
This commit adds a complete integration between n8n workflow automation and the Model Context Protocol (MCP): Features: - MCP server that exposes n8n workflows as tools, resources, and prompts - Custom n8n node for connecting to MCP servers from workflows - Bidirectional bridge for data format conversion - Token-based authentication and credential management - Comprehensive error handling and logging - Full test coverage for core components Infrastructure: - TypeScript/Node.js project setup with proper build configuration - Docker support with multi-stage builds - Development and production docker-compose configurations - Installation script for n8n custom node deployment Documentation: - Detailed README with usage examples and API reference - Environment configuration templates - Troubleshooting guide 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
13
.env.example
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.env.example
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# MCP Server Configuration
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MCP_SERVER_PORT=3000
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MCP_SERVER_HOST=localhost
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# n8n Configuration
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N8N_API_URL=http://localhost:5678
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N8N_API_KEY=your-n8n-api-key
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# Authentication
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MCP_AUTH_TOKEN=your-secure-token
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# Logging
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LOG_LEVEL=info
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45
Dockerfile
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45
Dockerfile
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# Build stage
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FROM node:18-alpine AS builder
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WORKDIR /app
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# Copy package files
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COPY package*.json ./
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# Install dependencies
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RUN npm ci
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# Copy source code
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COPY . .
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# Build the project
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RUN npm run build
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# Production stage
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FROM node:18-alpine
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WORKDIR /app
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# Copy package files
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COPY package*.json ./
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# Install production dependencies only
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RUN npm ci --only=production
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# Copy built files from builder stage
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COPY --from=builder /app/dist ./dist
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# Create a non-root user
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RUN addgroup -g 1001 -S nodejs && adduser -S nodejs -u 1001
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# Change ownership
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RUN chown -R nodejs:nodejs /app
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# Switch to non-root user
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USER nodejs
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# Expose the MCP server port (if using HTTP transport)
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EXPOSE 3000
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# Start the MCP server
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CMD ["node", "dist/index.js"]
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243
README.md
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README.md
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# n8n-mcp
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Integration between n8n workflow automation and Model Context Protocol (MCP). This project provides:
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- An MCP server that exposes n8n workflows and operations to AI assistants
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- A custom n8n node for connecting to MCP servers from within workflows
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## Features
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- **MCP Server**: Expose n8n workflows as tools, resources, and prompts for AI assistants
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- **n8n Node**: Connect to any MCP server from n8n workflows
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- **Bidirectional Integration**: Use AI capabilities in n8n and n8n automation in AI contexts
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- **Authentication**: Secure token-based authentication
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- **Flexible Transport**: Support for WebSocket and stdio connections
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## Quick Start
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### Prerequisites
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- Node.js 18+
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- n8n instance with API access enabled
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- MCP-compatible AI assistant (Claude, etc.)
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### Installation
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```bash
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# Clone the repository
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git clone https://github.com/czlonkowski/n8n-mcp.git
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cd n8n-mcp
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# Install dependencies
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npm install
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# Copy environment configuration
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cp .env.example .env
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# Configure your n8n API credentials
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# Edit .env with your n8n instance details
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```
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### Running the MCP Server
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```bash
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# Build the project
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npm run build
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# Start the MCP server
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npm start
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```
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For development:
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```bash
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npm run dev
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```
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## Configuration
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### Environment Variables
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Create a `.env` file based on `.env.example`:
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```env
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# MCP Server Configuration
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MCP_SERVER_PORT=3000
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MCP_SERVER_HOST=localhost
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# n8n Configuration
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N8N_API_URL=http://localhost:5678
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N8N_API_KEY=your-n8n-api-key
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# Authentication
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MCP_AUTH_TOKEN=your-secure-token
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# Logging
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LOG_LEVEL=info
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```
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## Usage
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### Using the MCP Server with Claude
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Add the server to your Claude configuration:
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```json
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{
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"mcpServers": {
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"n8n": {
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"command": "node",
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"args": ["/path/to/n8n-mcp/dist/index.js"],
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"env": {
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"N8N_API_URL": "http://localhost:5678",
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"N8N_API_KEY": "your-api-key"
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}
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}
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}
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}
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```
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### Available MCP Tools
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- `execute_workflow` - Execute an n8n workflow by ID
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- `list_workflows` - List all available workflows
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- `get_workflow` - Get details of a specific workflow
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- `create_workflow` - Create a new workflow
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- `update_workflow` - Update an existing workflow
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- `delete_workflow` - Delete a workflow
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- `get_executions` - Get workflow execution history
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- `get_execution_data` - Get detailed execution data
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### Using the n8n MCP Node
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1. Copy the node files to your n8n custom nodes directory
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2. Restart n8n
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3. The MCP node will appear in the nodes panel
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4. Configure with your MCP server credentials
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5. Select operations: Call Tool, List Tools, Read Resource, etc.
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### Example n8n Workflow
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```json
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{
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"name": "MCP AI Assistant",
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"nodes": [
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{
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"name": "MCP",
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"type": "mcp",
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"parameters": {
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"operation": "callTool",
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"toolName": "generate_text",
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"toolArguments": "{\"prompt\": \"Write a summary\"}"
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}
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}
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]
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}
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```
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## Architecture
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### Project Structure
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```
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n8n-mcp/
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├── src/
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│ ├── mcp/ # MCP server implementation
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│ ├── n8n/ # n8n node implementation
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│ ├── utils/ # Shared utilities
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│ └── types/ # TypeScript type definitions
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├── tests/ # Test files
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└── dist/ # Compiled output
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```
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### Key Components
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- **MCP Server**: Handles MCP protocol requests and translates to n8n API calls
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- **n8n API Client**: Manages communication with n8n instance
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- **Bridge Layer**: Converts between n8n and MCP data formats
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- **Authentication**: Validates tokens and manages access control
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## Development
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### Running Tests
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```bash
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npm test
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```
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### Building
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```bash
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npm run build
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```
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### Type Checking
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```bash
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npm run typecheck
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```
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## API Reference
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### MCP Tools
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#### execute_workflow
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Execute an n8n workflow by ID.
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Parameters:
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- `workflowId` (string, required): The workflow ID
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- `data` (object, optional): Input data for the workflow
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#### list_workflows
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List all available workflows.
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Parameters:
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- `active` (boolean, optional): Filter by active status
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- `tags` (array, optional): Filter by tags
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### MCP Resources
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- `workflow://active` - List of active workflows
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- `workflow://all` - List of all workflows
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- `execution://recent` - Recent execution history
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- `credentials://types` - Available credential types
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- `nodes://available` - Available n8n nodes
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### MCP Prompts
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- `create_workflow_prompt` - Generate workflow creation prompts
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- `debug_workflow_prompt` - Debug workflow issues
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- `optimize_workflow_prompt` - Optimize workflow performance
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- `explain_workflow_prompt` - Explain workflow functionality
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## Troubleshooting
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### Common Issues
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1. **Connection refused**: Ensure n8n is running and API is enabled
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2. **Authentication failed**: Check your API key in .env
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3. **Workflow not found**: Verify workflow ID exists in n8n
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4. **MCP connection failed**: Check server is running and accessible
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### Debug Mode
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Enable debug logging:
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```env
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LOG_LEVEL=debug
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```
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## Contributing
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1. Fork the repository
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2. Create a feature branch
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3. Make your changes
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4. Add tests
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5. Submit a pull request
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## License
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ISC License - see LICENSE file for details
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## Support
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- Issues: https://github.com/czlonkowski/n8n-mcp/issues
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- n8n Documentation: https://docs.n8n.io
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- MCP Specification: https://modelcontextprotocol.io
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docker-compose.dev.yml
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docker-compose.dev.yml
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version: '3.8'
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services:
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n8n:
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image: n8nio/n8n:latest
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container_name: n8n-dev
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restart: unless-stopped
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ports:
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- "5678:5678"
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environment:
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- N8N_BASIC_AUTH_ACTIVE=false
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- N8N_HOST=localhost
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- N8N_PORT=5678
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- N8N_PROTOCOL=http
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- NODE_ENV=development
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- WEBHOOK_URL=http://localhost:5678/
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- GENERIC_TIMEZONE=UTC
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# Enable API for MCP integration
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- N8N_USER_MANAGEMENT_DISABLED=true
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- N8N_PUBLIC_API_DISABLED=false
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volumes:
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- n8n_data:/home/node/.n8n
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- ./dist/n8n:/home/node/.n8n/custom/nodes
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networks:
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- n8n-network
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networks:
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n8n-network:
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driver: bridge
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volumes:
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n8n_data:
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docker-compose.yml
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docker-compose.yml
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version: '3.8'
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services:
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n8n-mcp:
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build: .
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container_name: n8n-mcp-server
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restart: unless-stopped
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environment:
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- MCP_SERVER_PORT=${MCP_SERVER_PORT:-3000}
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- MCP_SERVER_HOST=${MCP_SERVER_HOST:-0.0.0.0}
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- N8N_API_URL=${N8N_API_URL:-http://n8n:5678}
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- N8N_API_KEY=${N8N_API_KEY}
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- MCP_AUTH_TOKEN=${MCP_AUTH_TOKEN}
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- LOG_LEVEL=${LOG_LEVEL:-info}
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ports:
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- "${MCP_SERVER_PORT:-3000}:3000"
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networks:
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- n8n-network
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depends_on:
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- n8n
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n8n:
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image: n8nio/n8n:latest
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container_name: n8n
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restart: unless-stopped
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ports:
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- "5678:5678"
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environment:
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- N8N_BASIC_AUTH_ACTIVE=true
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- N8N_BASIC_AUTH_USER=${N8N_BASIC_AUTH_USER:-admin}
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- N8N_BASIC_AUTH_PASSWORD=${N8N_BASIC_AUTH_PASSWORD:-password}
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- N8N_HOST=${N8N_HOST:-localhost}
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- N8N_PORT=5678
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- N8N_PROTOCOL=${N8N_PROTOCOL:-http}
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- NODE_ENV=production
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- WEBHOOK_URL=${WEBHOOK_URL:-http://localhost:5678/}
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- GENERIC_TIMEZONE=${GENERIC_TIMEZONE:-UTC}
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volumes:
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- n8n_data:/home/node/.n8n
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- ./n8n-custom-nodes:/home/node/.n8n/custom
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networks:
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- n8n-network
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networks:
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n8n-network:
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driver: bridge
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volumes:
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n8n_data:
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16
jest.config.js
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jest.config.js
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module.exports = {
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preset: 'ts-jest',
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testEnvironment: 'node',
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roots: ['<rootDir>/src', '<rootDir>/tests'],
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testMatch: ['**/__tests__/**/*.ts', '**/?(*.)+(spec|test).ts'],
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transform: {
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'^.+\\.ts$': 'ts-jest',
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},
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collectCoverageFrom: [
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'src/**/*.ts',
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'!src/**/*.d.ts',
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'!src/**/*.test.ts',
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],
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coverageDirectory: 'coverage',
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coverageReporters: ['text', 'lcov', 'html'],
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};
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14739
package-lock.json
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14739
package-lock.json
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File diff suppressed because it is too large
Load Diff
42
package.json
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42
package.json
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{
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"name": "n8n-mcp",
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"version": "1.0.0",
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"description": "Integration between n8n workflow automation and Model Context Protocol (MCP)",
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"main": "dist/index.js",
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"scripts": {
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"build": "tsc",
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"dev": "nodemon --exec ts-node src/index.ts",
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"start": "node dist/index.js",
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"test": "jest",
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"lint": "tsc --noEmit",
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"typecheck": "tsc --noEmit"
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},
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"repository": {
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"type": "git",
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"url": "git+https://github.com/czlonkowski/n8n-mcp.git"
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},
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"keywords": [],
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"author": "",
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"license": "ISC",
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"bugs": {
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"url": "https://github.com/czlonkowski/n8n-mcp/issues"
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},
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"homepage": "https://github.com/czlonkowski/n8n-mcp#readme",
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"devDependencies": {
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"@types/express": "^5.0.3",
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"@types/jest": "^29.5.14",
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"@types/node": "^22.15.30",
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"jest": "^29.7.0",
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"nodemon": "^3.1.10",
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"ts-jest": "^29.3.4",
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"ts-node": "^10.9.2",
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"typescript": "^5.8.3"
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},
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"dependencies": {
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"@modelcontextprotocol/sdk": "^1.12.1",
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"dotenv": "^16.5.0",
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"express": "^5.1.0",
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"n8n-core": "^1.14.1",
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"n8n-workflow": "^1.82.0"
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}
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}
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50
scripts/install-n8n-node.sh
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50
scripts/install-n8n-node.sh
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#!/bin/bash
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# Script to install the MCP node into n8n
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set -e
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echo "Installing n8n MCP node..."
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# Build the project
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echo "Building project..."
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npm run build
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# Create custom nodes directory if it doesn't exist
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N8N_CUSTOM_DIR="${N8N_CUSTOM_DIR:-$HOME/.n8n/custom}"
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mkdir -p "$N8N_CUSTOM_DIR/nodes/n8n-mcp"
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# Copy node files
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echo "Copying node files to n8n custom directory..."
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cp dist/n8n/MCPNode.node.js "$N8N_CUSTOM_DIR/nodes/n8n-mcp/"
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cp dist/n8n/MCPApi.credentials.js "$N8N_CUSTOM_DIR/nodes/n8n-mcp/"
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# Copy utils for the node to work
|
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mkdir -p "$N8N_CUSTOM_DIR/nodes/n8n-mcp/utils"
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cp -r dist/utils/* "$N8N_CUSTOM_DIR/nodes/n8n-mcp/utils/"
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# Create package.json for the custom node
|
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cat > "$N8N_CUSTOM_DIR/nodes/n8n-mcp/package.json" << EOF
|
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{
|
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"name": "n8n-nodes-mcp",
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"version": "1.0.0",
|
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"description": "MCP integration for n8n",
|
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"n8n": {
|
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"n8nNodesApiVersion": 1,
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"credentials": [
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"dist/n8n/MCPApi.credentials.js"
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],
|
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"nodes": [
|
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"dist/n8n/MCPNode.node.js"
|
||||
]
|
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},
|
||||
"dependencies": {
|
||||
"@modelcontextprotocol/sdk": "^1.12.1"
|
||||
}
|
||||
}
|
||||
EOF
|
||||
|
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echo "MCP node installed successfully!"
|
||||
echo "Please restart n8n for the changes to take effect."
|
||||
echo ""
|
||||
echo "Custom node location: $N8N_CUSTOM_DIR/nodes/n8n-mcp"
|
||||
45
src/index.ts
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45
src/index.ts
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import dotenv from 'dotenv';
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import { N8NMCPServer } from './mcp/server';
|
||||
import { MCPServerConfig, N8NConfig } from './types';
|
||||
import { logger } from './utils/logger';
|
||||
|
||||
// Load environment variables
|
||||
dotenv.config();
|
||||
|
||||
async function main() {
|
||||
const config: MCPServerConfig = {
|
||||
port: parseInt(process.env.MCP_SERVER_PORT || '3000', 10),
|
||||
host: process.env.MCP_SERVER_HOST || 'localhost',
|
||||
authToken: process.env.MCP_AUTH_TOKEN,
|
||||
};
|
||||
|
||||
const n8nConfig: N8NConfig = {
|
||||
apiUrl: process.env.N8N_API_URL || 'http://localhost:5678',
|
||||
apiKey: process.env.N8N_API_KEY || '',
|
||||
};
|
||||
|
||||
const server = new N8NMCPServer(config, n8nConfig);
|
||||
|
||||
try {
|
||||
await server.start();
|
||||
} catch (error) {
|
||||
logger.error('Failed to start MCP server:', error);
|
||||
process.exit(1);
|
||||
}
|
||||
}
|
||||
|
||||
// Handle graceful shutdown
|
||||
process.on('SIGINT', () => {
|
||||
logger.info('Received SIGINT, shutting down MCP server...');
|
||||
process.exit(0);
|
||||
});
|
||||
|
||||
process.on('SIGTERM', () => {
|
||||
logger.info('Received SIGTERM, shutting down MCP server...');
|
||||
process.exit(0);
|
||||
});
|
||||
|
||||
main().catch((error) => {
|
||||
logger.error('Unhandled error:', error);
|
||||
process.exit(1);
|
||||
});
|
||||
73
src/mcp/prompts.ts
Normal file
73
src/mcp/prompts.ts
Normal file
@@ -0,0 +1,73 @@
|
||||
import { PromptDefinition } from '../types';
|
||||
|
||||
export const n8nPrompts: PromptDefinition[] = [
|
||||
{
|
||||
name: 'create_workflow_prompt',
|
||||
description: 'Generate a prompt to create a new n8n workflow',
|
||||
arguments: [
|
||||
{
|
||||
name: 'description',
|
||||
description: 'Description of what the workflow should do',
|
||||
required: true,
|
||||
},
|
||||
{
|
||||
name: 'inputType',
|
||||
description: 'Type of input the workflow expects',
|
||||
required: false,
|
||||
},
|
||||
{
|
||||
name: 'outputType',
|
||||
description: 'Type of output the workflow should produce',
|
||||
required: false,
|
||||
},
|
||||
],
|
||||
},
|
||||
{
|
||||
name: 'debug_workflow_prompt',
|
||||
description: 'Generate a prompt to debug an n8n workflow',
|
||||
arguments: [
|
||||
{
|
||||
name: 'workflowId',
|
||||
description: 'ID of the workflow to debug',
|
||||
required: true,
|
||||
},
|
||||
{
|
||||
name: 'errorMessage',
|
||||
description: 'Error message or issue description',
|
||||
required: false,
|
||||
},
|
||||
],
|
||||
},
|
||||
{
|
||||
name: 'optimize_workflow_prompt',
|
||||
description: 'Generate a prompt to optimize an n8n workflow',
|
||||
arguments: [
|
||||
{
|
||||
name: 'workflowId',
|
||||
description: 'ID of the workflow to optimize',
|
||||
required: true,
|
||||
},
|
||||
{
|
||||
name: 'optimizationGoal',
|
||||
description: 'What to optimize for (speed, reliability, cost)',
|
||||
required: false,
|
||||
},
|
||||
],
|
||||
},
|
||||
{
|
||||
name: 'explain_workflow_prompt',
|
||||
description: 'Generate a prompt to explain how a workflow works',
|
||||
arguments: [
|
||||
{
|
||||
name: 'workflowId',
|
||||
description: 'ID of the workflow to explain',
|
||||
required: true,
|
||||
},
|
||||
{
|
||||
name: 'audienceLevel',
|
||||
description: 'Technical level of the audience (beginner, intermediate, expert)',
|
||||
required: false,
|
||||
},
|
||||
],
|
||||
},
|
||||
];
|
||||
34
src/mcp/resources.ts
Normal file
34
src/mcp/resources.ts
Normal file
@@ -0,0 +1,34 @@
|
||||
import { ResourceDefinition } from '../types';
|
||||
|
||||
export const n8nResources: ResourceDefinition[] = [
|
||||
{
|
||||
uri: 'workflow://active',
|
||||
name: 'Active Workflows',
|
||||
description: 'List of all active workflows in n8n',
|
||||
mimeType: 'application/json',
|
||||
},
|
||||
{
|
||||
uri: 'workflow://all',
|
||||
name: 'All Workflows',
|
||||
description: 'List of all workflows in n8n',
|
||||
mimeType: 'application/json',
|
||||
},
|
||||
{
|
||||
uri: 'execution://recent',
|
||||
name: 'Recent Executions',
|
||||
description: 'Recent workflow execution history',
|
||||
mimeType: 'application/json',
|
||||
},
|
||||
{
|
||||
uri: 'credentials://types',
|
||||
name: 'Credential Types',
|
||||
description: 'Available credential types in n8n',
|
||||
mimeType: 'application/json',
|
||||
},
|
||||
{
|
||||
uri: 'nodes://available',
|
||||
name: 'Available Nodes',
|
||||
description: 'List of all available n8n nodes',
|
||||
mimeType: 'application/json',
|
||||
},
|
||||
];
|
||||
272
src/mcp/server.ts
Normal file
272
src/mcp/server.ts
Normal file
@@ -0,0 +1,272 @@
|
||||
import { Server } from '@modelcontextprotocol/sdk/server/index.js';
|
||||
import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js';
|
||||
import {
|
||||
CallToolRequestSchema,
|
||||
ListResourcesRequestSchema,
|
||||
ListToolsRequestSchema,
|
||||
ListPromptsRequestSchema,
|
||||
GetPromptRequestSchema,
|
||||
ReadResourceRequestSchema
|
||||
} from '@modelcontextprotocol/sdk/types.js';
|
||||
import { MCPServerConfig, N8NConfig } from '../types';
|
||||
import { n8nTools } from './tools';
|
||||
import { n8nResources } from './resources';
|
||||
import { n8nPrompts } from './prompts';
|
||||
import { N8NApiClient } from '../utils/n8n-client';
|
||||
import { N8NMCPBridge } from '../utils/bridge';
|
||||
import { logger } from '../utils/logger';
|
||||
|
||||
export class N8NMCPServer {
|
||||
private server: Server;
|
||||
private n8nClient: N8NApiClient;
|
||||
|
||||
constructor(config: MCPServerConfig, n8nConfig: N8NConfig) {
|
||||
this.n8nClient = new N8NApiClient(n8nConfig);
|
||||
logger.info('Initializing n8n MCP server', { config, n8nConfig });
|
||||
this.server = new Server(
|
||||
{
|
||||
name: 'n8n-mcp-server',
|
||||
version: '1.0.0',
|
||||
},
|
||||
{
|
||||
capabilities: {
|
||||
tools: {},
|
||||
resources: {},
|
||||
prompts: {},
|
||||
},
|
||||
}
|
||||
);
|
||||
|
||||
this.setupHandlers();
|
||||
}
|
||||
|
||||
private setupHandlers(): void {
|
||||
// Handle tool listing
|
||||
this.server.setRequestHandler(ListToolsRequestSchema, async () => ({
|
||||
tools: n8nTools,
|
||||
}));
|
||||
|
||||
// Handle tool execution
|
||||
this.server.setRequestHandler(CallToolRequestSchema, async (request) => {
|
||||
const { name, arguments: args } = request.params;
|
||||
|
||||
try {
|
||||
logger.debug(`Executing tool: ${name}`, { args });
|
||||
const result = await this.executeTool(name, args);
|
||||
logger.debug(`Tool ${name} executed successfully`, { result });
|
||||
return {
|
||||
content: [
|
||||
{
|
||||
type: 'text',
|
||||
text: JSON.stringify(result, null, 2),
|
||||
},
|
||||
],
|
||||
};
|
||||
} catch (error) {
|
||||
logger.error(`Error executing tool ${name}`, error);
|
||||
return {
|
||||
content: [
|
||||
{
|
||||
type: 'text',
|
||||
text: `Error executing tool ${name}: ${error instanceof Error ? error.message : 'Unknown error'}`,
|
||||
},
|
||||
],
|
||||
isError: true,
|
||||
};
|
||||
}
|
||||
});
|
||||
|
||||
// Handle resource listing
|
||||
this.server.setRequestHandler(ListResourcesRequestSchema, async () => ({
|
||||
resources: n8nResources,
|
||||
}));
|
||||
|
||||
// Handle resource reading
|
||||
this.server.setRequestHandler(ReadResourceRequestSchema, async (request) => {
|
||||
const { uri } = request.params;
|
||||
|
||||
try {
|
||||
logger.debug(`Reading resource: ${uri}`);
|
||||
const content = await this.readResource(uri);
|
||||
logger.debug(`Resource ${uri} read successfully`);
|
||||
return {
|
||||
contents: [
|
||||
{
|
||||
uri,
|
||||
mimeType: 'application/json',
|
||||
text: JSON.stringify(content, null, 2),
|
||||
},
|
||||
],
|
||||
};
|
||||
} catch (error) {
|
||||
logger.error(`Failed to read resource ${uri}`, error);
|
||||
throw new Error(`Failed to read resource ${uri}: ${error instanceof Error ? error.message : 'Unknown error'}`);
|
||||
}
|
||||
});
|
||||
|
||||
// Handle prompt listing
|
||||
this.server.setRequestHandler(ListPromptsRequestSchema, async () => ({
|
||||
prompts: n8nPrompts,
|
||||
}));
|
||||
|
||||
// Handle prompt retrieval
|
||||
this.server.setRequestHandler(GetPromptRequestSchema, async (request) => {
|
||||
const { name, arguments: args } = request.params;
|
||||
|
||||
const prompt = n8nPrompts.find(p => p.name === name);
|
||||
if (!prompt) {
|
||||
throw new Error(`Prompt ${name} not found`);
|
||||
}
|
||||
|
||||
const promptText = await this.generatePrompt(name, args);
|
||||
|
||||
return {
|
||||
description: prompt.description,
|
||||
messages: [
|
||||
{
|
||||
role: 'user',
|
||||
content: {
|
||||
type: 'text',
|
||||
text: promptText,
|
||||
},
|
||||
},
|
||||
],
|
||||
};
|
||||
});
|
||||
}
|
||||
|
||||
private async executeTool(name: string, args: any): Promise<any> {
|
||||
// Tool execution logic based on specific n8n operations
|
||||
switch (name) {
|
||||
case 'execute_workflow':
|
||||
return this.executeWorkflow(args);
|
||||
case 'list_workflows':
|
||||
return this.listWorkflows(args);
|
||||
case 'get_workflow':
|
||||
return this.getWorkflow(args);
|
||||
case 'create_workflow':
|
||||
return this.createWorkflow(args);
|
||||
case 'update_workflow':
|
||||
return this.updateWorkflow(args);
|
||||
case 'delete_workflow':
|
||||
return this.deleteWorkflow(args);
|
||||
case 'get_executions':
|
||||
return this.getExecutions(args);
|
||||
case 'get_execution_data':
|
||||
return this.getExecutionData(args);
|
||||
default:
|
||||
throw new Error(`Unknown tool: ${name}`);
|
||||
}
|
||||
}
|
||||
|
||||
private async readResource(uri: string): Promise<any> {
|
||||
// Resource reading logic will be implemented
|
||||
if (uri.startsWith('workflow://')) {
|
||||
const workflowId = uri.replace('workflow://', '');
|
||||
return this.getWorkflow({ id: workflowId });
|
||||
}
|
||||
throw new Error(`Unknown resource URI: ${uri}`);
|
||||
}
|
||||
|
||||
private async generatePrompt(name: string, args: any): Promise<string> {
|
||||
// Prompt generation logic will be implemented
|
||||
switch (name) {
|
||||
case 'create_workflow_prompt':
|
||||
return `Create an n8n workflow that ${args.description}`;
|
||||
case 'debug_workflow_prompt':
|
||||
return `Debug the n8n workflow with ID ${args.workflowId} and identify any issues`;
|
||||
default:
|
||||
throw new Error(`Unknown prompt: ${name}`);
|
||||
}
|
||||
}
|
||||
|
||||
// n8n integration methods
|
||||
private async executeWorkflow(args: any): Promise<any> {
|
||||
try {
|
||||
const result = await this.n8nClient.executeWorkflow(args.workflowId, args.data);
|
||||
return N8NMCPBridge.sanitizeData(result);
|
||||
} catch (error) {
|
||||
throw new Error(`Failed to execute workflow: ${error instanceof Error ? error.message : 'Unknown error'}`);
|
||||
}
|
||||
}
|
||||
|
||||
private async listWorkflows(args: any): Promise<any> {
|
||||
try {
|
||||
const workflows = await this.n8nClient.getWorkflows(args);
|
||||
return {
|
||||
workflows: workflows.data.map((wf: any) => N8NMCPBridge.n8nWorkflowToMCP(wf)),
|
||||
};
|
||||
} catch (error) {
|
||||
throw new Error(`Failed to list workflows: ${error instanceof Error ? error.message : 'Unknown error'}`);
|
||||
}
|
||||
}
|
||||
|
||||
private async getWorkflow(args: any): Promise<any> {
|
||||
try {
|
||||
const workflow = await this.n8nClient.getWorkflow(args.id);
|
||||
return N8NMCPBridge.n8nWorkflowToMCP(workflow);
|
||||
} catch (error) {
|
||||
throw new Error(`Failed to get workflow: ${error instanceof Error ? error.message : 'Unknown error'}`);
|
||||
}
|
||||
}
|
||||
|
||||
private async createWorkflow(args: any): Promise<any> {
|
||||
try {
|
||||
const workflowData = N8NMCPBridge.mcpToN8NWorkflow(args);
|
||||
const result = await this.n8nClient.createWorkflow(workflowData);
|
||||
return N8NMCPBridge.n8nWorkflowToMCP(result);
|
||||
} catch (error) {
|
||||
throw new Error(`Failed to create workflow: ${error instanceof Error ? error.message : 'Unknown error'}`);
|
||||
}
|
||||
}
|
||||
|
||||
private async updateWorkflow(args: any): Promise<any> {
|
||||
try {
|
||||
const result = await this.n8nClient.updateWorkflow(args.id, args.updates);
|
||||
return N8NMCPBridge.n8nWorkflowToMCP(result);
|
||||
} catch (error) {
|
||||
throw new Error(`Failed to update workflow: ${error instanceof Error ? error.message : 'Unknown error'}`);
|
||||
}
|
||||
}
|
||||
|
||||
private async deleteWorkflow(args: any): Promise<any> {
|
||||
try {
|
||||
await this.n8nClient.deleteWorkflow(args.id);
|
||||
return { success: true, id: args.id };
|
||||
} catch (error) {
|
||||
throw new Error(`Failed to delete workflow: ${error instanceof Error ? error.message : 'Unknown error'}`);
|
||||
}
|
||||
}
|
||||
|
||||
private async getExecutions(args: any): Promise<any> {
|
||||
try {
|
||||
const executions = await this.n8nClient.getExecutions(args);
|
||||
return {
|
||||
executions: executions.data.map((exec: any) => N8NMCPBridge.n8nExecutionToMCPResource(exec)),
|
||||
};
|
||||
} catch (error) {
|
||||
throw new Error(`Failed to get executions: ${error instanceof Error ? error.message : 'Unknown error'}`);
|
||||
}
|
||||
}
|
||||
|
||||
private async getExecutionData(args: any): Promise<any> {
|
||||
try {
|
||||
const execution = await this.n8nClient.getExecution(args.executionId);
|
||||
return N8NMCPBridge.n8nExecutionToMCPResource(execution);
|
||||
} catch (error) {
|
||||
throw new Error(`Failed to get execution data: ${error instanceof Error ? error.message : 'Unknown error'}`);
|
||||
}
|
||||
}
|
||||
|
||||
async start(): Promise<void> {
|
||||
try {
|
||||
logger.info('Starting n8n MCP server...');
|
||||
const transport = new StdioServerTransport();
|
||||
await this.server.connect(transport);
|
||||
logger.info('n8n MCP server started successfully');
|
||||
} catch (error) {
|
||||
logger.error('Failed to start MCP server', error);
|
||||
throw error;
|
||||
}
|
||||
}
|
||||
}
|
||||
148
src/mcp/tools.ts
Normal file
148
src/mcp/tools.ts
Normal file
@@ -0,0 +1,148 @@
|
||||
import { ToolDefinition } from '../types';
|
||||
|
||||
export const n8nTools: ToolDefinition[] = [
|
||||
{
|
||||
name: 'execute_workflow',
|
||||
description: 'Execute an n8n workflow by ID',
|
||||
inputSchema: {
|
||||
type: 'object',
|
||||
properties: {
|
||||
workflowId: {
|
||||
type: 'string',
|
||||
description: 'The ID of the workflow to execute',
|
||||
},
|
||||
data: {
|
||||
type: 'object',
|
||||
description: 'Input data for the workflow execution',
|
||||
},
|
||||
},
|
||||
required: ['workflowId'],
|
||||
},
|
||||
},
|
||||
{
|
||||
name: 'list_workflows',
|
||||
description: 'List all available n8n workflows',
|
||||
inputSchema: {
|
||||
type: 'object',
|
||||
properties: {
|
||||
active: {
|
||||
type: 'boolean',
|
||||
description: 'Filter by active status',
|
||||
},
|
||||
tags: {
|
||||
type: 'array',
|
||||
items: { type: 'string' },
|
||||
description: 'Filter by tags',
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
{
|
||||
name: 'get_workflow',
|
||||
description: 'Get details of a specific workflow',
|
||||
inputSchema: {
|
||||
type: 'object',
|
||||
properties: {
|
||||
id: {
|
||||
type: 'string',
|
||||
description: 'The workflow ID',
|
||||
},
|
||||
},
|
||||
required: ['id'],
|
||||
},
|
||||
},
|
||||
{
|
||||
name: 'create_workflow',
|
||||
description: 'Create a new n8n workflow',
|
||||
inputSchema: {
|
||||
type: 'object',
|
||||
properties: {
|
||||
name: {
|
||||
type: 'string',
|
||||
description: 'Name of the workflow',
|
||||
},
|
||||
nodes: {
|
||||
type: 'array',
|
||||
description: 'Array of node definitions',
|
||||
},
|
||||
connections: {
|
||||
type: 'object',
|
||||
description: 'Node connections',
|
||||
},
|
||||
settings: {
|
||||
type: 'object',
|
||||
description: 'Workflow settings',
|
||||
},
|
||||
},
|
||||
required: ['name'],
|
||||
},
|
||||
},
|
||||
{
|
||||
name: 'update_workflow',
|
||||
description: 'Update an existing workflow',
|
||||
inputSchema: {
|
||||
type: 'object',
|
||||
properties: {
|
||||
id: {
|
||||
type: 'string',
|
||||
description: 'The workflow ID',
|
||||
},
|
||||
updates: {
|
||||
type: 'object',
|
||||
description: 'Updates to apply to the workflow',
|
||||
},
|
||||
},
|
||||
required: ['id', 'updates'],
|
||||
},
|
||||
},
|
||||
{
|
||||
name: 'delete_workflow',
|
||||
description: 'Delete a workflow',
|
||||
inputSchema: {
|
||||
type: 'object',
|
||||
properties: {
|
||||
id: {
|
||||
type: 'string',
|
||||
description: 'The workflow ID to delete',
|
||||
},
|
||||
},
|
||||
required: ['id'],
|
||||
},
|
||||
},
|
||||
{
|
||||
name: 'get_executions',
|
||||
description: 'Get workflow execution history',
|
||||
inputSchema: {
|
||||
type: 'object',
|
||||
properties: {
|
||||
workflowId: {
|
||||
type: 'string',
|
||||
description: 'Filter by workflow ID',
|
||||
},
|
||||
status: {
|
||||
type: 'string',
|
||||
enum: ['success', 'error', 'running', 'waiting'],
|
||||
description: 'Filter by execution status',
|
||||
},
|
||||
limit: {
|
||||
type: 'number',
|
||||
description: 'Maximum number of executions to return',
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
{
|
||||
name: 'get_execution_data',
|
||||
description: 'Get detailed data for a specific execution',
|
||||
inputSchema: {
|
||||
type: 'object',
|
||||
properties: {
|
||||
executionId: {
|
||||
type: 'string',
|
||||
description: 'The execution ID',
|
||||
},
|
||||
},
|
||||
required: ['executionId'],
|
||||
},
|
||||
},
|
||||
];
|
||||
51
src/n8n/MCPApi.credentials.ts
Normal file
51
src/n8n/MCPApi.credentials.ts
Normal file
@@ -0,0 +1,51 @@
|
||||
import {
|
||||
ICredentialType,
|
||||
INodeProperties,
|
||||
} from 'n8n-workflow';
|
||||
|
||||
export class MCPApi implements ICredentialType {
|
||||
name = 'mcpApi';
|
||||
displayName = 'MCP API';
|
||||
documentationUrl = 'mcp';
|
||||
properties: INodeProperties[] = [
|
||||
{
|
||||
displayName: 'Server URL',
|
||||
name: 'serverUrl',
|
||||
type: 'string',
|
||||
default: 'http://localhost:3000',
|
||||
placeholder: 'http://localhost:3000',
|
||||
description: 'The URL of the MCP server',
|
||||
},
|
||||
{
|
||||
displayName: 'Authentication Token',
|
||||
name: 'authToken',
|
||||
type: 'string',
|
||||
typeOptions: {
|
||||
password: true,
|
||||
},
|
||||
default: '',
|
||||
description: 'Authentication token for the MCP server (if required)',
|
||||
},
|
||||
{
|
||||
displayName: 'Connection Type',
|
||||
name: 'connectionType',
|
||||
type: 'options',
|
||||
options: [
|
||||
{
|
||||
name: 'HTTP',
|
||||
value: 'http',
|
||||
},
|
||||
{
|
||||
name: 'WebSocket',
|
||||
value: 'websocket',
|
||||
},
|
||||
{
|
||||
name: 'STDIO',
|
||||
value: 'stdio',
|
||||
},
|
||||
],
|
||||
default: 'http',
|
||||
description: 'How to connect to the MCP server',
|
||||
},
|
||||
];
|
||||
}
|
||||
280
src/n8n/MCPNode.node.ts
Normal file
280
src/n8n/MCPNode.node.ts
Normal file
@@ -0,0 +1,280 @@
|
||||
import {
|
||||
IExecuteFunctions,
|
||||
INodeExecutionData,
|
||||
INodeType,
|
||||
INodeTypeDescription,
|
||||
NodeOperationError,
|
||||
NodeConnectionType,
|
||||
} from 'n8n-workflow';
|
||||
import { MCPClient } from '../utils/mcp-client';
|
||||
import { N8NMCPBridge } from '../utils/bridge';
|
||||
|
||||
export class MCPNode implements INodeType {
|
||||
description: INodeTypeDescription = {
|
||||
displayName: 'MCP',
|
||||
name: 'mcp',
|
||||
icon: 'file:mcp.svg',
|
||||
group: ['transform'],
|
||||
version: 1,
|
||||
description: 'Interact with Model Context Protocol (MCP) servers',
|
||||
defaults: {
|
||||
name: 'MCP',
|
||||
},
|
||||
inputs: [NodeConnectionType.Main],
|
||||
outputs: [NodeConnectionType.Main],
|
||||
credentials: [
|
||||
{
|
||||
name: 'mcpApi',
|
||||
required: true,
|
||||
},
|
||||
],
|
||||
properties: [
|
||||
{
|
||||
displayName: 'Operation',
|
||||
name: 'operation',
|
||||
type: 'options',
|
||||
noDataExpression: true,
|
||||
options: [
|
||||
{
|
||||
name: 'Call Tool',
|
||||
value: 'callTool',
|
||||
description: 'Execute an MCP tool',
|
||||
},
|
||||
{
|
||||
name: 'List Tools',
|
||||
value: 'listTools',
|
||||
description: 'List available MCP tools',
|
||||
},
|
||||
{
|
||||
name: 'Read Resource',
|
||||
value: 'readResource',
|
||||
description: 'Read an MCP resource',
|
||||
},
|
||||
{
|
||||
name: 'List Resources',
|
||||
value: 'listResources',
|
||||
description: 'List available MCP resources',
|
||||
},
|
||||
{
|
||||
name: 'Get Prompt',
|
||||
value: 'getPrompt',
|
||||
description: 'Get an MCP prompt',
|
||||
},
|
||||
{
|
||||
name: 'List Prompts',
|
||||
value: 'listPrompts',
|
||||
description: 'List available MCP prompts',
|
||||
},
|
||||
],
|
||||
default: 'callTool',
|
||||
},
|
||||
// Tool-specific fields
|
||||
{
|
||||
displayName: 'Tool Name',
|
||||
name: 'toolName',
|
||||
type: 'string',
|
||||
required: true,
|
||||
displayOptions: {
|
||||
show: {
|
||||
operation: ['callTool'],
|
||||
},
|
||||
},
|
||||
default: '',
|
||||
description: 'Name of the MCP tool to execute',
|
||||
},
|
||||
{
|
||||
displayName: 'Tool Arguments',
|
||||
name: 'toolArguments',
|
||||
type: 'json',
|
||||
required: false,
|
||||
displayOptions: {
|
||||
show: {
|
||||
operation: ['callTool'],
|
||||
},
|
||||
},
|
||||
default: '{}',
|
||||
description: 'Arguments to pass to the MCP tool',
|
||||
},
|
||||
// Resource-specific fields
|
||||
{
|
||||
displayName: 'Resource URI',
|
||||
name: 'resourceUri',
|
||||
type: 'string',
|
||||
required: true,
|
||||
displayOptions: {
|
||||
show: {
|
||||
operation: ['readResource'],
|
||||
},
|
||||
},
|
||||
default: '',
|
||||
description: 'URI of the MCP resource to read',
|
||||
},
|
||||
// Prompt-specific fields
|
||||
{
|
||||
displayName: 'Prompt Name',
|
||||
name: 'promptName',
|
||||
type: 'string',
|
||||
required: true,
|
||||
displayOptions: {
|
||||
show: {
|
||||
operation: ['getPrompt'],
|
||||
},
|
||||
},
|
||||
default: '',
|
||||
description: 'Name of the MCP prompt to retrieve',
|
||||
},
|
||||
{
|
||||
displayName: 'Prompt Arguments',
|
||||
name: 'promptArguments',
|
||||
type: 'json',
|
||||
required: false,
|
||||
displayOptions: {
|
||||
show: {
|
||||
operation: ['getPrompt'],
|
||||
},
|
||||
},
|
||||
default: '{}',
|
||||
description: 'Arguments to pass to the MCP prompt',
|
||||
},
|
||||
],
|
||||
};
|
||||
|
||||
async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
|
||||
const items = this.getInputData();
|
||||
const returnData: INodeExecutionData[] = [];
|
||||
const operation = this.getNodeParameter('operation', 0) as string;
|
||||
|
||||
// Get credentials
|
||||
const credentials = await this.getCredentials('mcpApi');
|
||||
|
||||
for (let itemIndex = 0; itemIndex < items.length; itemIndex++) {
|
||||
try {
|
||||
let result: any;
|
||||
|
||||
switch (operation) {
|
||||
case 'callTool':
|
||||
const toolName = this.getNodeParameter('toolName', itemIndex) as string;
|
||||
const toolArgumentsJson = this.getNodeParameter('toolArguments', itemIndex) as string;
|
||||
const toolArguments = JSON.parse(toolArgumentsJson);
|
||||
|
||||
result = await (this as any).callMCPTool(credentials, toolName, toolArguments);
|
||||
break;
|
||||
|
||||
case 'listTools':
|
||||
result = await (this as any).listMCPTools(credentials);
|
||||
break;
|
||||
|
||||
case 'readResource':
|
||||
const resourceUri = this.getNodeParameter('resourceUri', itemIndex) as string;
|
||||
result = await (this as any).readMCPResource(credentials, resourceUri);
|
||||
break;
|
||||
|
||||
case 'listResources':
|
||||
result = await (this as any).listMCPResources(credentials);
|
||||
break;
|
||||
|
||||
case 'getPrompt':
|
||||
const promptName = this.getNodeParameter('promptName', itemIndex) as string;
|
||||
const promptArgumentsJson = this.getNodeParameter('promptArguments', itemIndex) as string;
|
||||
const promptArguments = JSON.parse(promptArgumentsJson);
|
||||
|
||||
result = await (this as any).getMCPPrompt(credentials, promptName, promptArguments);
|
||||
break;
|
||||
|
||||
case 'listPrompts':
|
||||
result = await (this as any).listMCPPrompts(credentials);
|
||||
break;
|
||||
|
||||
default:
|
||||
throw new NodeOperationError(this.getNode(), `Unknown operation: ${operation}`);
|
||||
}
|
||||
|
||||
returnData.push({
|
||||
json: result,
|
||||
pairedItem: itemIndex,
|
||||
});
|
||||
} catch (error) {
|
||||
if (this.continueOnFail()) {
|
||||
returnData.push({
|
||||
json: {
|
||||
error: error instanceof Error ? error.message : 'Unknown error',
|
||||
},
|
||||
pairedItem: itemIndex,
|
||||
});
|
||||
continue;
|
||||
}
|
||||
throw error;
|
||||
}
|
||||
}
|
||||
|
||||
return [returnData];
|
||||
}
|
||||
|
||||
// MCP client methods
|
||||
private async getMCPClient(credentials: any): Promise<MCPClient> {
|
||||
const client = new MCPClient({
|
||||
serverUrl: credentials.serverUrl,
|
||||
authToken: credentials.authToken,
|
||||
connectionType: credentials.connectionType || 'websocket',
|
||||
});
|
||||
await client.connect();
|
||||
return client;
|
||||
}
|
||||
|
||||
private async callMCPTool(credentials: any, toolName: string, args: any): Promise<any> {
|
||||
const client = await this.getMCPClient(credentials);
|
||||
try {
|
||||
const result = await client.callTool(toolName, args);
|
||||
return N8NMCPBridge.mcpToN8NExecutionData(result).json;
|
||||
} finally {
|
||||
await client.disconnect();
|
||||
}
|
||||
}
|
||||
|
||||
private async listMCPTools(credentials: any): Promise<any> {
|
||||
const client = await this.getMCPClient(credentials);
|
||||
try {
|
||||
return await client.listTools();
|
||||
} finally {
|
||||
await client.disconnect();
|
||||
}
|
||||
}
|
||||
|
||||
private async readMCPResource(credentials: any, uri: string): Promise<any> {
|
||||
const client = await this.getMCPClient(credentials);
|
||||
try {
|
||||
const result = await client.readResource(uri);
|
||||
return N8NMCPBridge.mcpToN8NExecutionData(result).json;
|
||||
} finally {
|
||||
await client.disconnect();
|
||||
}
|
||||
}
|
||||
|
||||
private async listMCPResources(credentials: any): Promise<any> {
|
||||
const client = await this.getMCPClient(credentials);
|
||||
try {
|
||||
return await client.listResources();
|
||||
} finally {
|
||||
await client.disconnect();
|
||||
}
|
||||
}
|
||||
|
||||
private async getMCPPrompt(credentials: any, promptName: string, args: any): Promise<any> {
|
||||
const client = await this.getMCPClient(credentials);
|
||||
try {
|
||||
const result = await client.getPrompt(promptName, args);
|
||||
return N8NMCPBridge.mcpPromptArgsToN8N(result);
|
||||
} finally {
|
||||
await client.disconnect();
|
||||
}
|
||||
}
|
||||
|
||||
private async listMCPPrompts(credentials: any): Promise<any> {
|
||||
const client = await this.getMCPClient(credentials);
|
||||
try {
|
||||
return await client.listPrompts();
|
||||
} finally {
|
||||
await client.disconnect();
|
||||
}
|
||||
}
|
||||
}
|
||||
37
src/types/index.ts
Normal file
37
src/types/index.ts
Normal file
@@ -0,0 +1,37 @@
|
||||
export interface MCPServerConfig {
|
||||
port: number;
|
||||
host: string;
|
||||
authToken?: string;
|
||||
}
|
||||
|
||||
export interface N8NConfig {
|
||||
apiUrl: string;
|
||||
apiKey: string;
|
||||
}
|
||||
|
||||
export interface ToolDefinition {
|
||||
name: string;
|
||||
description: string;
|
||||
inputSchema: {
|
||||
type: string;
|
||||
properties: Record<string, any>;
|
||||
required?: string[];
|
||||
};
|
||||
}
|
||||
|
||||
export interface ResourceDefinition {
|
||||
uri: string;
|
||||
name: string;
|
||||
description?: string;
|
||||
mimeType?: string;
|
||||
}
|
||||
|
||||
export interface PromptDefinition {
|
||||
name: string;
|
||||
description?: string;
|
||||
arguments?: Array<{
|
||||
name: string;
|
||||
description?: string;
|
||||
required?: boolean;
|
||||
}>;
|
||||
}
|
||||
100
src/utils/auth.ts
Normal file
100
src/utils/auth.ts
Normal file
@@ -0,0 +1,100 @@
|
||||
import crypto from 'crypto';
|
||||
|
||||
export class AuthManager {
|
||||
private validTokens: Set<string>;
|
||||
private tokenExpiry: Map<string, number>;
|
||||
|
||||
constructor() {
|
||||
this.validTokens = new Set();
|
||||
this.tokenExpiry = new Map();
|
||||
}
|
||||
|
||||
/**
|
||||
* Validate an authentication token
|
||||
*/
|
||||
validateToken(token: string | undefined, expectedToken?: string): boolean {
|
||||
if (!expectedToken) {
|
||||
// No authentication required
|
||||
return true;
|
||||
}
|
||||
|
||||
if (!token) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// Check static token
|
||||
if (token === expectedToken) {
|
||||
return true;
|
||||
}
|
||||
|
||||
// Check dynamic tokens
|
||||
if (this.validTokens.has(token)) {
|
||||
const expiry = this.tokenExpiry.get(token);
|
||||
if (expiry && expiry > Date.now()) {
|
||||
return true;
|
||||
} else {
|
||||
// Token expired
|
||||
this.validTokens.delete(token);
|
||||
this.tokenExpiry.delete(token);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Generate a new authentication token
|
||||
*/
|
||||
generateToken(expiryHours: number = 24): string {
|
||||
const token = crypto.randomBytes(32).toString('hex');
|
||||
const expiryTime = Date.now() + (expiryHours * 60 * 60 * 1000);
|
||||
|
||||
this.validTokens.add(token);
|
||||
this.tokenExpiry.set(token, expiryTime);
|
||||
|
||||
// Clean up expired tokens
|
||||
this.cleanupExpiredTokens();
|
||||
|
||||
return token;
|
||||
}
|
||||
|
||||
/**
|
||||
* Revoke a token
|
||||
*/
|
||||
revokeToken(token: string): void {
|
||||
this.validTokens.delete(token);
|
||||
this.tokenExpiry.delete(token);
|
||||
}
|
||||
|
||||
/**
|
||||
* Clean up expired tokens
|
||||
*/
|
||||
private cleanupExpiredTokens(): void {
|
||||
const now = Date.now();
|
||||
for (const [token, expiry] of this.tokenExpiry.entries()) {
|
||||
if (expiry <= now) {
|
||||
this.validTokens.delete(token);
|
||||
this.tokenExpiry.delete(token);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Hash a password or token for secure storage
|
||||
*/
|
||||
static hashToken(token: string): string {
|
||||
return crypto.createHash('sha256').update(token).digest('hex');
|
||||
}
|
||||
|
||||
/**
|
||||
* Compare a plain token with a hashed token
|
||||
*/
|
||||
static compareTokens(plainToken: string, hashedToken: string): boolean {
|
||||
const hashedPlainToken = AuthManager.hashToken(plainToken);
|
||||
return crypto.timingSafeEqual(
|
||||
Buffer.from(hashedPlainToken),
|
||||
Buffer.from(hashedToken)
|
||||
);
|
||||
}
|
||||
}
|
||||
166
src/utils/bridge.ts
Normal file
166
src/utils/bridge.ts
Normal file
@@ -0,0 +1,166 @@
|
||||
import { INodeExecutionData, IDataObject } from 'n8n-workflow';
|
||||
|
||||
export class N8NMCPBridge {
|
||||
/**
|
||||
* Convert n8n workflow data to MCP tool arguments
|
||||
*/
|
||||
static n8nToMCPToolArgs(data: IDataObject): any {
|
||||
// Handle different data formats from n8n
|
||||
if (data.json) {
|
||||
return data.json;
|
||||
}
|
||||
|
||||
// Remove n8n-specific metadata
|
||||
const { pairedItem, ...cleanData } = data;
|
||||
return cleanData;
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert MCP tool response to n8n execution data
|
||||
*/
|
||||
static mcpToN8NExecutionData(mcpResponse: any, itemIndex: number = 0): INodeExecutionData {
|
||||
// Handle MCP content array format
|
||||
if (mcpResponse.content && Array.isArray(mcpResponse.content)) {
|
||||
const textContent = mcpResponse.content
|
||||
.filter((c: any) => c.type === 'text')
|
||||
.map((c: any) => c.text)
|
||||
.join('\n');
|
||||
|
||||
try {
|
||||
// Try to parse as JSON if possible
|
||||
const parsed = JSON.parse(textContent);
|
||||
return {
|
||||
json: parsed,
|
||||
pairedItem: itemIndex,
|
||||
};
|
||||
} catch {
|
||||
// Return as text if not JSON
|
||||
return {
|
||||
json: { result: textContent },
|
||||
pairedItem: itemIndex,
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
// Handle direct object response
|
||||
return {
|
||||
json: mcpResponse,
|
||||
pairedItem: itemIndex,
|
||||
};
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert n8n workflow definition to MCP-compatible format
|
||||
*/
|
||||
static n8nWorkflowToMCP(workflow: any): any {
|
||||
return {
|
||||
id: workflow.id,
|
||||
name: workflow.name,
|
||||
description: workflow.description || '',
|
||||
nodes: workflow.nodes?.map((node: any) => ({
|
||||
id: node.id,
|
||||
type: node.type,
|
||||
name: node.name,
|
||||
parameters: node.parameters,
|
||||
position: node.position,
|
||||
})),
|
||||
connections: workflow.connections,
|
||||
settings: workflow.settings,
|
||||
metadata: {
|
||||
createdAt: workflow.createdAt,
|
||||
updatedAt: workflow.updatedAt,
|
||||
active: workflow.active,
|
||||
},
|
||||
};
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert MCP workflow format to n8n-compatible format
|
||||
*/
|
||||
static mcpToN8NWorkflow(mcpWorkflow: any): any {
|
||||
return {
|
||||
name: mcpWorkflow.name,
|
||||
nodes: mcpWorkflow.nodes || [],
|
||||
connections: mcpWorkflow.connections || {},
|
||||
settings: mcpWorkflow.settings || {
|
||||
executionOrder: 'v1',
|
||||
},
|
||||
staticData: null,
|
||||
pinData: {},
|
||||
};
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert n8n execution data to MCP resource format
|
||||
*/
|
||||
static n8nExecutionToMCPResource(execution: any): any {
|
||||
return {
|
||||
uri: `execution://${execution.id}`,
|
||||
name: `Execution ${execution.id}`,
|
||||
description: `Workflow: ${execution.workflowData?.name || 'Unknown'}`,
|
||||
mimeType: 'application/json',
|
||||
data: {
|
||||
id: execution.id,
|
||||
workflowId: execution.workflowId,
|
||||
status: execution.finished ? 'completed' : execution.stoppedAt ? 'stopped' : 'running',
|
||||
mode: execution.mode,
|
||||
startedAt: execution.startedAt,
|
||||
stoppedAt: execution.stoppedAt,
|
||||
error: execution.data?.resultData?.error,
|
||||
executionData: execution.data,
|
||||
},
|
||||
};
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert MCP prompt arguments to n8n-compatible format
|
||||
*/
|
||||
static mcpPromptArgsToN8N(promptArgs: any): IDataObject {
|
||||
return {
|
||||
prompt: promptArgs.name || '',
|
||||
arguments: promptArgs.arguments || {},
|
||||
messages: promptArgs.messages || [],
|
||||
};
|
||||
}
|
||||
|
||||
/**
|
||||
* Validate and sanitize data before conversion
|
||||
*/
|
||||
static sanitizeData(data: any): any {
|
||||
if (data === null || data === undefined) {
|
||||
return {};
|
||||
}
|
||||
|
||||
if (typeof data !== 'object') {
|
||||
return { value: data };
|
||||
}
|
||||
|
||||
// Remove circular references
|
||||
const seen = new WeakSet();
|
||||
return JSON.parse(JSON.stringify(data, (_key, value) => {
|
||||
if (typeof value === 'object' && value !== null) {
|
||||
if (seen.has(value)) {
|
||||
return '[Circular]';
|
||||
}
|
||||
seen.add(value);
|
||||
}
|
||||
return value;
|
||||
}));
|
||||
}
|
||||
|
||||
/**
|
||||
* Extract error information for both n8n and MCP formats
|
||||
*/
|
||||
static formatError(error: any): any {
|
||||
return {
|
||||
message: error.message || 'Unknown error',
|
||||
type: error.name || 'Error',
|
||||
stack: error.stack,
|
||||
details: {
|
||||
code: error.code,
|
||||
statusCode: error.statusCode,
|
||||
data: error.data,
|
||||
},
|
||||
};
|
||||
}
|
||||
}
|
||||
95
src/utils/error-handler.ts
Normal file
95
src/utils/error-handler.ts
Normal file
@@ -0,0 +1,95 @@
|
||||
import { logger } from './logger';
|
||||
|
||||
export class MCPError extends Error {
|
||||
public code: string;
|
||||
public statusCode?: number;
|
||||
public data?: any;
|
||||
|
||||
constructor(message: string, code: string, statusCode?: number, data?: any) {
|
||||
super(message);
|
||||
this.name = 'MCPError';
|
||||
this.code = code;
|
||||
this.statusCode = statusCode;
|
||||
this.data = data;
|
||||
}
|
||||
}
|
||||
|
||||
export class N8NConnectionError extends MCPError {
|
||||
constructor(message: string, data?: any) {
|
||||
super(message, 'N8N_CONNECTION_ERROR', 503, data);
|
||||
this.name = 'N8NConnectionError';
|
||||
}
|
||||
}
|
||||
|
||||
export class AuthenticationError extends MCPError {
|
||||
constructor(message: string = 'Authentication failed') {
|
||||
super(message, 'AUTH_ERROR', 401);
|
||||
this.name = 'AuthenticationError';
|
||||
}
|
||||
}
|
||||
|
||||
export class ValidationError extends MCPError {
|
||||
constructor(message: string, data?: any) {
|
||||
super(message, 'VALIDATION_ERROR', 400, data);
|
||||
this.name = 'ValidationError';
|
||||
}
|
||||
}
|
||||
|
||||
export class ToolNotFoundError extends MCPError {
|
||||
constructor(toolName: string) {
|
||||
super(`Tool '${toolName}' not found`, 'TOOL_NOT_FOUND', 404);
|
||||
this.name = 'ToolNotFoundError';
|
||||
}
|
||||
}
|
||||
|
||||
export class ResourceNotFoundError extends MCPError {
|
||||
constructor(resourceUri: string) {
|
||||
super(`Resource '${resourceUri}' not found`, 'RESOURCE_NOT_FOUND', 404);
|
||||
this.name = 'ResourceNotFoundError';
|
||||
}
|
||||
}
|
||||
|
||||
export function handleError(error: any): MCPError {
|
||||
if (error instanceof MCPError) {
|
||||
return error;
|
||||
}
|
||||
|
||||
if (error.response) {
|
||||
// HTTP error from n8n API
|
||||
const status = error.response.status;
|
||||
const message = error.response.data?.message || error.message;
|
||||
|
||||
if (status === 401) {
|
||||
return new AuthenticationError(message);
|
||||
} else if (status === 404) {
|
||||
return new MCPError(message, 'NOT_FOUND', 404);
|
||||
} else if (status >= 500) {
|
||||
return new N8NConnectionError(message);
|
||||
}
|
||||
|
||||
return new MCPError(message, 'API_ERROR', status);
|
||||
}
|
||||
|
||||
if (error.code === 'ECONNREFUSED') {
|
||||
return new N8NConnectionError('Cannot connect to n8n API');
|
||||
}
|
||||
|
||||
// Generic error
|
||||
return new MCPError(
|
||||
error.message || 'An unexpected error occurred',
|
||||
'UNKNOWN_ERROR',
|
||||
500
|
||||
);
|
||||
}
|
||||
|
||||
export async function withErrorHandling<T>(
|
||||
operation: () => Promise<T>,
|
||||
context: string
|
||||
): Promise<T> {
|
||||
try {
|
||||
return await operation();
|
||||
} catch (error) {
|
||||
logger.error(`Error in ${context}:`, error);
|
||||
throw handleError(error);
|
||||
}
|
||||
}
|
||||
106
src/utils/logger.ts
Normal file
106
src/utils/logger.ts
Normal file
@@ -0,0 +1,106 @@
|
||||
export enum LogLevel {
|
||||
ERROR = 0,
|
||||
WARN = 1,
|
||||
INFO = 2,
|
||||
DEBUG = 3,
|
||||
}
|
||||
|
||||
export interface LoggerConfig {
|
||||
level: LogLevel;
|
||||
prefix?: string;
|
||||
timestamp?: boolean;
|
||||
}
|
||||
|
||||
export class Logger {
|
||||
private config: LoggerConfig;
|
||||
private static instance: Logger;
|
||||
|
||||
constructor(config?: Partial<LoggerConfig>) {
|
||||
this.config = {
|
||||
level: LogLevel.INFO,
|
||||
prefix: 'n8n-mcp',
|
||||
timestamp: true,
|
||||
...config,
|
||||
};
|
||||
}
|
||||
|
||||
static getInstance(config?: Partial<LoggerConfig>): Logger {
|
||||
if (!Logger.instance) {
|
||||
Logger.instance = new Logger(config);
|
||||
}
|
||||
return Logger.instance;
|
||||
}
|
||||
|
||||
private formatMessage(level: string, message: string): string {
|
||||
const parts: string[] = [];
|
||||
|
||||
if (this.config.timestamp) {
|
||||
parts.push(`[${new Date().toISOString()}]`);
|
||||
}
|
||||
|
||||
if (this.config.prefix) {
|
||||
parts.push(`[${this.config.prefix}]`);
|
||||
}
|
||||
|
||||
parts.push(`[${level}]`);
|
||||
parts.push(message);
|
||||
|
||||
return parts.join(' ');
|
||||
}
|
||||
|
||||
private log(level: LogLevel, levelName: string, message: string, ...args: any[]): void {
|
||||
if (level <= this.config.level) {
|
||||
const formattedMessage = this.formatMessage(levelName, message);
|
||||
|
||||
switch (level) {
|
||||
case LogLevel.ERROR:
|
||||
console.error(formattedMessage, ...args);
|
||||
break;
|
||||
case LogLevel.WARN:
|
||||
console.warn(formattedMessage, ...args);
|
||||
break;
|
||||
default:
|
||||
console.log(formattedMessage, ...args);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
error(message: string, ...args: any[]): void {
|
||||
this.log(LogLevel.ERROR, 'ERROR', message, ...args);
|
||||
}
|
||||
|
||||
warn(message: string, ...args: any[]): void {
|
||||
this.log(LogLevel.WARN, 'WARN', message, ...args);
|
||||
}
|
||||
|
||||
info(message: string, ...args: any[]): void {
|
||||
this.log(LogLevel.INFO, 'INFO', message, ...args);
|
||||
}
|
||||
|
||||
debug(message: string, ...args: any[]): void {
|
||||
this.log(LogLevel.DEBUG, 'DEBUG', message, ...args);
|
||||
}
|
||||
|
||||
setLevel(level: LogLevel): void {
|
||||
this.config.level = level;
|
||||
}
|
||||
|
||||
static parseLogLevel(level: string): LogLevel {
|
||||
switch (level.toLowerCase()) {
|
||||
case 'error':
|
||||
return LogLevel.ERROR;
|
||||
case 'warn':
|
||||
return LogLevel.WARN;
|
||||
case 'debug':
|
||||
return LogLevel.DEBUG;
|
||||
case 'info':
|
||||
default:
|
||||
return LogLevel.INFO;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Create a default logger instance
|
||||
export const logger = Logger.getInstance({
|
||||
level: Logger.parseLogLevel(process.env.LOG_LEVEL || 'info'),
|
||||
});
|
||||
150
src/utils/mcp-client.ts
Normal file
150
src/utils/mcp-client.ts
Normal file
@@ -0,0 +1,150 @@
|
||||
import { Client } from '@modelcontextprotocol/sdk/client/index.js';
|
||||
import { StdioClientTransport } from '@modelcontextprotocol/sdk/client/stdio.js';
|
||||
import { WebSocketClientTransport } from '@modelcontextprotocol/sdk/client/websocket.js';
|
||||
import {
|
||||
CallToolRequest,
|
||||
ListToolsRequest,
|
||||
ListResourcesRequest,
|
||||
ReadResourceRequest,
|
||||
ListPromptsRequest,
|
||||
GetPromptRequest,
|
||||
CallToolResultSchema,
|
||||
ListToolsResultSchema,
|
||||
ListResourcesResultSchema,
|
||||
ReadResourceResultSchema,
|
||||
ListPromptsResultSchema,
|
||||
GetPromptResultSchema,
|
||||
} from '@modelcontextprotocol/sdk/types.js';
|
||||
|
||||
export interface MCPClientConfig {
|
||||
serverUrl: string;
|
||||
authToken?: string;
|
||||
connectionType: 'http' | 'websocket' | 'stdio';
|
||||
}
|
||||
|
||||
export class MCPClient {
|
||||
private client: Client;
|
||||
private config: MCPClientConfig;
|
||||
private connected: boolean = false;
|
||||
|
||||
constructor(config: MCPClientConfig) {
|
||||
this.config = config;
|
||||
this.client = new Client(
|
||||
{
|
||||
name: 'n8n-mcp-client',
|
||||
version: '1.0.0',
|
||||
},
|
||||
{
|
||||
capabilities: {},
|
||||
}
|
||||
);
|
||||
}
|
||||
|
||||
async connect(): Promise<void> {
|
||||
if (this.connected) {
|
||||
return;
|
||||
}
|
||||
|
||||
let transport;
|
||||
|
||||
switch (this.config.connectionType) {
|
||||
case 'websocket':
|
||||
const wsUrl = this.config.serverUrl.replace(/^http/, 'ws');
|
||||
transport = new WebSocketClientTransport(new URL(wsUrl));
|
||||
break;
|
||||
|
||||
case 'stdio':
|
||||
// For stdio, the serverUrl should be the command to execute
|
||||
const [command, ...args] = this.config.serverUrl.split(' ');
|
||||
transport = new StdioClientTransport({
|
||||
command,
|
||||
args,
|
||||
});
|
||||
break;
|
||||
|
||||
default:
|
||||
throw new Error(`HTTP transport is not yet supported for MCP clients`);
|
||||
}
|
||||
|
||||
await this.client.connect(transport);
|
||||
this.connected = true;
|
||||
}
|
||||
|
||||
async disconnect(): Promise<void> {
|
||||
if (this.connected) {
|
||||
await this.client.close();
|
||||
this.connected = false;
|
||||
}
|
||||
}
|
||||
|
||||
async listTools(): Promise<any> {
|
||||
await this.ensureConnected();
|
||||
return await this.client.request(
|
||||
{ method: 'tools/list' } as ListToolsRequest,
|
||||
ListToolsResultSchema
|
||||
);
|
||||
}
|
||||
|
||||
async callTool(name: string, args: any): Promise<any> {
|
||||
await this.ensureConnected();
|
||||
return await this.client.request(
|
||||
{
|
||||
method: 'tools/call',
|
||||
params: {
|
||||
name,
|
||||
arguments: args,
|
||||
},
|
||||
} as CallToolRequest,
|
||||
CallToolResultSchema
|
||||
);
|
||||
}
|
||||
|
||||
async listResources(): Promise<any> {
|
||||
await this.ensureConnected();
|
||||
return await this.client.request(
|
||||
{ method: 'resources/list' } as ListResourcesRequest,
|
||||
ListResourcesResultSchema
|
||||
);
|
||||
}
|
||||
|
||||
async readResource(uri: string): Promise<any> {
|
||||
await this.ensureConnected();
|
||||
return await this.client.request(
|
||||
{
|
||||
method: 'resources/read',
|
||||
params: {
|
||||
uri,
|
||||
},
|
||||
} as ReadResourceRequest,
|
||||
ReadResourceResultSchema
|
||||
);
|
||||
}
|
||||
|
||||
async listPrompts(): Promise<any> {
|
||||
await this.ensureConnected();
|
||||
return await this.client.request(
|
||||
{ method: 'prompts/list' } as ListPromptsRequest,
|
||||
ListPromptsResultSchema
|
||||
);
|
||||
}
|
||||
|
||||
async getPrompt(name: string, args?: any): Promise<any> {
|
||||
await this.ensureConnected();
|
||||
return await this.client.request(
|
||||
{
|
||||
method: 'prompts/get',
|
||||
params: {
|
||||
name,
|
||||
arguments: args,
|
||||
},
|
||||
} as GetPromptRequest,
|
||||
GetPromptResultSchema
|
||||
);
|
||||
}
|
||||
|
||||
private async ensureConnected(): Promise<void> {
|
||||
if (!this.connected) {
|
||||
await this.connect();
|
||||
}
|
||||
}
|
||||
}
|
||||
141
src/utils/n8n-client.ts
Normal file
141
src/utils/n8n-client.ts
Normal file
@@ -0,0 +1,141 @@
|
||||
import { N8NConfig } from '../types';
|
||||
|
||||
export class N8NApiClient {
|
||||
private config: N8NConfig;
|
||||
private headers: Record<string, string>;
|
||||
|
||||
constructor(config: N8NConfig) {
|
||||
this.config = config;
|
||||
this.headers = {
|
||||
'Content-Type': 'application/json',
|
||||
'X-N8N-API-KEY': config.apiKey,
|
||||
};
|
||||
}
|
||||
|
||||
private async request(endpoint: string, options: RequestInit = {}): Promise<any> {
|
||||
const url = `${this.config.apiUrl}/api/v1${endpoint}`;
|
||||
|
||||
try {
|
||||
const response = await fetch(url, {
|
||||
...options,
|
||||
headers: {
|
||||
...this.headers,
|
||||
...options.headers,
|
||||
},
|
||||
});
|
||||
|
||||
if (!response.ok) {
|
||||
const error = await response.text();
|
||||
throw new Error(`n8n API error: ${response.status} - ${error}`);
|
||||
}
|
||||
|
||||
return await response.json();
|
||||
} catch (error) {
|
||||
throw new Error(`Failed to connect to n8n: ${error instanceof Error ? error.message : 'Unknown error'}`);
|
||||
}
|
||||
}
|
||||
|
||||
// Workflow operations
|
||||
async getWorkflows(filters?: { active?: boolean; tags?: string[] }): Promise<any> {
|
||||
const query = new URLSearchParams();
|
||||
if (filters?.active !== undefined) {
|
||||
query.append('active', filters.active.toString());
|
||||
}
|
||||
if (filters?.tags?.length) {
|
||||
query.append('tags', filters.tags.join(','));
|
||||
}
|
||||
|
||||
return this.request(`/workflows${query.toString() ? `?${query}` : ''}`);
|
||||
}
|
||||
|
||||
async getWorkflow(id: string): Promise<any> {
|
||||
return this.request(`/workflows/${id}`);
|
||||
}
|
||||
|
||||
async createWorkflow(workflowData: any): Promise<any> {
|
||||
return this.request('/workflows', {
|
||||
method: 'POST',
|
||||
body: JSON.stringify(workflowData),
|
||||
});
|
||||
}
|
||||
|
||||
async updateWorkflow(id: string, updates: any): Promise<any> {
|
||||
return this.request(`/workflows/${id}`, {
|
||||
method: 'PATCH',
|
||||
body: JSON.stringify(updates),
|
||||
});
|
||||
}
|
||||
|
||||
async deleteWorkflow(id: string): Promise<any> {
|
||||
return this.request(`/workflows/${id}`, {
|
||||
method: 'DELETE',
|
||||
});
|
||||
}
|
||||
|
||||
async activateWorkflow(id: string): Promise<any> {
|
||||
return this.request(`/workflows/${id}/activate`, {
|
||||
method: 'POST',
|
||||
});
|
||||
}
|
||||
|
||||
async deactivateWorkflow(id: string): Promise<any> {
|
||||
return this.request(`/workflows/${id}/deactivate`, {
|
||||
method: 'POST',
|
||||
});
|
||||
}
|
||||
|
||||
// Execution operations
|
||||
async executeWorkflow(id: string, data?: any): Promise<any> {
|
||||
return this.request(`/workflows/${id}/execute`, {
|
||||
method: 'POST',
|
||||
body: JSON.stringify({ data }),
|
||||
});
|
||||
}
|
||||
|
||||
async getExecutions(filters?: {
|
||||
workflowId?: string;
|
||||
status?: string;
|
||||
limit?: number
|
||||
}): Promise<any> {
|
||||
const query = new URLSearchParams();
|
||||
if (filters?.workflowId) {
|
||||
query.append('workflowId', filters.workflowId);
|
||||
}
|
||||
if (filters?.status) {
|
||||
query.append('status', filters.status);
|
||||
}
|
||||
if (filters?.limit) {
|
||||
query.append('limit', filters.limit.toString());
|
||||
}
|
||||
|
||||
return this.request(`/executions${query.toString() ? `?${query}` : ''}`);
|
||||
}
|
||||
|
||||
async getExecution(id: string): Promise<any> {
|
||||
return this.request(`/executions/${id}`);
|
||||
}
|
||||
|
||||
async deleteExecution(id: string): Promise<any> {
|
||||
return this.request(`/executions/${id}`, {
|
||||
method: 'DELETE',
|
||||
});
|
||||
}
|
||||
|
||||
// Credential operations
|
||||
async getCredentialTypes(): Promise<any> {
|
||||
return this.request('/credential-types');
|
||||
}
|
||||
|
||||
async getCredentials(): Promise<any> {
|
||||
return this.request('/credentials');
|
||||
}
|
||||
|
||||
// Node operations
|
||||
async getNodeTypes(): Promise<any> {
|
||||
return this.request('/node-types');
|
||||
}
|
||||
|
||||
async getNodeType(nodeType: string): Promise<any> {
|
||||
return this.request(`/node-types/${nodeType}`);
|
||||
}
|
||||
}
|
||||
104
tests/auth.test.ts
Normal file
104
tests/auth.test.ts
Normal file
@@ -0,0 +1,104 @@
|
||||
import { AuthManager } from '../src/utils/auth';
|
||||
|
||||
describe('AuthManager', () => {
|
||||
let authManager: AuthManager;
|
||||
|
||||
beforeEach(() => {
|
||||
authManager = new AuthManager();
|
||||
});
|
||||
|
||||
describe('validateToken', () => {
|
||||
it('should return true when no authentication is required', () => {
|
||||
expect(authManager.validateToken('any-token')).toBe(true);
|
||||
expect(authManager.validateToken(undefined)).toBe(true);
|
||||
});
|
||||
|
||||
it('should validate static token correctly', () => {
|
||||
const expectedToken = 'secret-token';
|
||||
|
||||
expect(authManager.validateToken('secret-token', expectedToken)).toBe(true);
|
||||
expect(authManager.validateToken('wrong-token', expectedToken)).toBe(false);
|
||||
expect(authManager.validateToken(undefined, expectedToken)).toBe(false);
|
||||
});
|
||||
|
||||
it('should validate generated tokens', () => {
|
||||
const token = authManager.generateToken(1);
|
||||
|
||||
expect(authManager.validateToken(token, 'expected-token')).toBe(true);
|
||||
});
|
||||
|
||||
it('should reject expired tokens', () => {
|
||||
jest.useFakeTimers();
|
||||
|
||||
const token = authManager.generateToken(1); // 1 hour expiry
|
||||
|
||||
// Token should be valid initially
|
||||
expect(authManager.validateToken(token, 'expected-token')).toBe(true);
|
||||
|
||||
// Fast forward 2 hours
|
||||
jest.advanceTimersByTime(2 * 60 * 60 * 1000);
|
||||
|
||||
// Token should be expired
|
||||
expect(authManager.validateToken(token, 'expected-token')).toBe(false);
|
||||
|
||||
jest.useRealTimers();
|
||||
});
|
||||
});
|
||||
|
||||
describe('generateToken', () => {
|
||||
it('should generate unique tokens', () => {
|
||||
const token1 = authManager.generateToken();
|
||||
const token2 = authManager.generateToken();
|
||||
|
||||
expect(token1).not.toBe(token2);
|
||||
expect(token1).toHaveLength(64); // 32 bytes hex = 64 chars
|
||||
});
|
||||
|
||||
it('should set custom expiry time', () => {
|
||||
jest.useFakeTimers();
|
||||
|
||||
const token = authManager.generateToken(24); // 24 hours
|
||||
|
||||
// Token should be valid after 23 hours
|
||||
jest.advanceTimersByTime(23 * 60 * 60 * 1000);
|
||||
expect(authManager.validateToken(token, 'expected')).toBe(true);
|
||||
|
||||
// Token should expire after 25 hours
|
||||
jest.advanceTimersByTime(2 * 60 * 60 * 1000);
|
||||
expect(authManager.validateToken(token, 'expected')).toBe(false);
|
||||
|
||||
jest.useRealTimers();
|
||||
});
|
||||
});
|
||||
|
||||
describe('revokeToken', () => {
|
||||
it('should revoke a generated token', () => {
|
||||
const token = authManager.generateToken();
|
||||
|
||||
expect(authManager.validateToken(token, 'expected')).toBe(true);
|
||||
|
||||
authManager.revokeToken(token);
|
||||
|
||||
expect(authManager.validateToken(token, 'expected')).toBe(false);
|
||||
});
|
||||
});
|
||||
|
||||
describe('static methods', () => {
|
||||
it('should hash tokens consistently', () => {
|
||||
const token = 'my-secret-token';
|
||||
const hash1 = AuthManager.hashToken(token);
|
||||
const hash2 = AuthManager.hashToken(token);
|
||||
|
||||
expect(hash1).toBe(hash2);
|
||||
expect(hash1).toHaveLength(64); // SHA256 hex = 64 chars
|
||||
});
|
||||
|
||||
it('should compare tokens securely', () => {
|
||||
const token = 'my-secret-token';
|
||||
const hashedToken = AuthManager.hashToken(token);
|
||||
|
||||
expect(AuthManager.compareTokens(token, hashedToken)).toBe(true);
|
||||
expect(AuthManager.compareTokens('wrong-token', hashedToken)).toBe(false);
|
||||
});
|
||||
});
|
||||
});
|
||||
173
tests/bridge.test.ts
Normal file
173
tests/bridge.test.ts
Normal file
@@ -0,0 +1,173 @@
|
||||
import { N8NMCPBridge } from '../src/utils/bridge';
|
||||
|
||||
describe('N8NMCPBridge', () => {
|
||||
describe('n8nToMCPToolArgs', () => {
|
||||
it('should extract json from n8n data object', () => {
|
||||
const n8nData = { json: { foo: 'bar' } };
|
||||
const result = N8NMCPBridge.n8nToMCPToolArgs(n8nData);
|
||||
expect(result).toEqual({ foo: 'bar' });
|
||||
});
|
||||
|
||||
it('should remove n8n metadata', () => {
|
||||
const n8nData = { foo: 'bar', pairedItem: 0 };
|
||||
const result = N8NMCPBridge.n8nToMCPToolArgs(n8nData);
|
||||
expect(result).toEqual({ foo: 'bar' });
|
||||
});
|
||||
});
|
||||
|
||||
describe('mcpToN8NExecutionData', () => {
|
||||
it('should convert MCP content array to n8n format', () => {
|
||||
const mcpResponse = {
|
||||
content: [{ type: 'text', text: '{"result": "success"}' }],
|
||||
};
|
||||
const result = N8NMCPBridge.mcpToN8NExecutionData(mcpResponse, 1);
|
||||
expect(result).toEqual({
|
||||
json: { result: 'success' },
|
||||
pairedItem: 1,
|
||||
});
|
||||
});
|
||||
|
||||
it('should handle non-JSON text content', () => {
|
||||
const mcpResponse = {
|
||||
content: [{ type: 'text', text: 'plain text response' }],
|
||||
};
|
||||
const result = N8NMCPBridge.mcpToN8NExecutionData(mcpResponse);
|
||||
expect(result).toEqual({
|
||||
json: { result: 'plain text response' },
|
||||
pairedItem: 0,
|
||||
});
|
||||
});
|
||||
|
||||
it('should handle direct object response', () => {
|
||||
const mcpResponse = { foo: 'bar' };
|
||||
const result = N8NMCPBridge.mcpToN8NExecutionData(mcpResponse);
|
||||
expect(result).toEqual({
|
||||
json: { foo: 'bar' },
|
||||
pairedItem: 0,
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
describe('n8nWorkflowToMCP', () => {
|
||||
it('should convert n8n workflow to MCP format', () => {
|
||||
const n8nWorkflow = {
|
||||
id: '123',
|
||||
name: 'Test Workflow',
|
||||
nodes: [
|
||||
{
|
||||
id: 'node1',
|
||||
type: 'n8n-nodes-base.start',
|
||||
name: 'Start',
|
||||
parameters: {},
|
||||
position: [100, 100],
|
||||
},
|
||||
],
|
||||
connections: {},
|
||||
settings: { executionOrder: 'v1' },
|
||||
active: true,
|
||||
createdAt: '2024-01-01T00:00:00Z',
|
||||
updatedAt: '2024-01-02T00:00:00Z',
|
||||
};
|
||||
|
||||
const result = N8NMCPBridge.n8nWorkflowToMCP(n8nWorkflow);
|
||||
|
||||
expect(result).toEqual({
|
||||
id: '123',
|
||||
name: 'Test Workflow',
|
||||
description: '',
|
||||
nodes: [
|
||||
{
|
||||
id: 'node1',
|
||||
type: 'n8n-nodes-base.start',
|
||||
name: 'Start',
|
||||
parameters: {},
|
||||
position: [100, 100],
|
||||
},
|
||||
],
|
||||
connections: {},
|
||||
settings: { executionOrder: 'v1' },
|
||||
metadata: {
|
||||
createdAt: '2024-01-01T00:00:00Z',
|
||||
updatedAt: '2024-01-02T00:00:00Z',
|
||||
active: true,
|
||||
},
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
describe('mcpToN8NWorkflow', () => {
|
||||
it('should convert MCP workflow to n8n format', () => {
|
||||
const mcpWorkflow = {
|
||||
name: 'Test Workflow',
|
||||
nodes: [{ id: 'node1', type: 'n8n-nodes-base.start' }],
|
||||
connections: { node1: { main: [[]] } },
|
||||
};
|
||||
|
||||
const result = N8NMCPBridge.mcpToN8NWorkflow(mcpWorkflow);
|
||||
|
||||
expect(result).toEqual({
|
||||
name: 'Test Workflow',
|
||||
nodes: [{ id: 'node1', type: 'n8n-nodes-base.start' }],
|
||||
connections: { node1: { main: [[]] } },
|
||||
settings: { executionOrder: 'v1' },
|
||||
staticData: null,
|
||||
pinData: {},
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
describe('sanitizeData', () => {
|
||||
it('should handle null and undefined', () => {
|
||||
expect(N8NMCPBridge.sanitizeData(null)).toEqual({});
|
||||
expect(N8NMCPBridge.sanitizeData(undefined)).toEqual({});
|
||||
});
|
||||
|
||||
it('should wrap non-objects', () => {
|
||||
expect(N8NMCPBridge.sanitizeData('string')).toEqual({ value: 'string' });
|
||||
expect(N8NMCPBridge.sanitizeData(123)).toEqual({ value: 123 });
|
||||
});
|
||||
|
||||
it('should handle circular references', () => {
|
||||
const obj: any = { a: 1 };
|
||||
obj.circular = obj;
|
||||
|
||||
const result = N8NMCPBridge.sanitizeData(obj);
|
||||
expect(result).toEqual({ a: 1, circular: '[Circular]' });
|
||||
});
|
||||
});
|
||||
|
||||
describe('formatError', () => {
|
||||
it('should format standard errors', () => {
|
||||
const error = new Error('Test error');
|
||||
error.stack = 'stack trace';
|
||||
|
||||
const result = N8NMCPBridge.formatError(error);
|
||||
|
||||
expect(result).toEqual({
|
||||
message: 'Test error',
|
||||
type: 'Error',
|
||||
stack: 'stack trace',
|
||||
details: {
|
||||
code: undefined,
|
||||
statusCode: undefined,
|
||||
data: undefined,
|
||||
},
|
||||
});
|
||||
});
|
||||
|
||||
it('should include additional error properties', () => {
|
||||
const error: any = new Error('API error');
|
||||
error.code = 'ERR_API';
|
||||
error.statusCode = 404;
|
||||
error.data = { field: 'value' };
|
||||
|
||||
const result = N8NMCPBridge.formatError(error);
|
||||
|
||||
expect(result.details).toEqual({
|
||||
code: 'ERR_API',
|
||||
statusCode: 404,
|
||||
data: { field: 'value' },
|
||||
});
|
||||
});
|
||||
});
|
||||
});
|
||||
188
tests/error-handler.test.ts
Normal file
188
tests/error-handler.test.ts
Normal file
@@ -0,0 +1,188 @@
|
||||
import {
|
||||
MCPError,
|
||||
N8NConnectionError,
|
||||
AuthenticationError,
|
||||
ValidationError,
|
||||
ToolNotFoundError,
|
||||
ResourceNotFoundError,
|
||||
handleError,
|
||||
withErrorHandling,
|
||||
} from '../src/utils/error-handler';
|
||||
import { logger } from '../src/utils/logger';
|
||||
|
||||
// Mock the logger
|
||||
jest.mock('../src/utils/logger', () => ({
|
||||
logger: {
|
||||
error: jest.fn(),
|
||||
},
|
||||
}));
|
||||
|
||||
describe('Error Classes', () => {
|
||||
describe('MCPError', () => {
|
||||
it('should create error with all properties', () => {
|
||||
const error = new MCPError('Test error', 'TEST_CODE', 400, { field: 'value' });
|
||||
|
||||
expect(error.message).toBe('Test error');
|
||||
expect(error.code).toBe('TEST_CODE');
|
||||
expect(error.statusCode).toBe(400);
|
||||
expect(error.data).toEqual({ field: 'value' });
|
||||
expect(error.name).toBe('MCPError');
|
||||
});
|
||||
});
|
||||
|
||||
describe('N8NConnectionError', () => {
|
||||
it('should create connection error with correct code', () => {
|
||||
const error = new N8NConnectionError('Connection failed');
|
||||
|
||||
expect(error.message).toBe('Connection failed');
|
||||
expect(error.code).toBe('N8N_CONNECTION_ERROR');
|
||||
expect(error.statusCode).toBe(503);
|
||||
expect(error.name).toBe('N8NConnectionError');
|
||||
});
|
||||
});
|
||||
|
||||
describe('AuthenticationError', () => {
|
||||
it('should create auth error with default message', () => {
|
||||
const error = new AuthenticationError();
|
||||
|
||||
expect(error.message).toBe('Authentication failed');
|
||||
expect(error.code).toBe('AUTH_ERROR');
|
||||
expect(error.statusCode).toBe(401);
|
||||
});
|
||||
|
||||
it('should accept custom message', () => {
|
||||
const error = new AuthenticationError('Invalid token');
|
||||
expect(error.message).toBe('Invalid token');
|
||||
});
|
||||
});
|
||||
|
||||
describe('ValidationError', () => {
|
||||
it('should create validation error', () => {
|
||||
const error = new ValidationError('Invalid input', { field: 'email' });
|
||||
|
||||
expect(error.message).toBe('Invalid input');
|
||||
expect(error.code).toBe('VALIDATION_ERROR');
|
||||
expect(error.statusCode).toBe(400);
|
||||
expect(error.data).toEqual({ field: 'email' });
|
||||
});
|
||||
});
|
||||
|
||||
describe('ToolNotFoundError', () => {
|
||||
it('should create tool not found error', () => {
|
||||
const error = new ToolNotFoundError('myTool');
|
||||
|
||||
expect(error.message).toBe("Tool 'myTool' not found");
|
||||
expect(error.code).toBe('TOOL_NOT_FOUND');
|
||||
expect(error.statusCode).toBe(404);
|
||||
});
|
||||
});
|
||||
|
||||
describe('ResourceNotFoundError', () => {
|
||||
it('should create resource not found error', () => {
|
||||
const error = new ResourceNotFoundError('workflow://123');
|
||||
|
||||
expect(error.message).toBe("Resource 'workflow://123' not found");
|
||||
expect(error.code).toBe('RESOURCE_NOT_FOUND');
|
||||
expect(error.statusCode).toBe(404);
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
describe('handleError', () => {
|
||||
it('should return MCPError instances as-is', () => {
|
||||
const mcpError = new ValidationError('Test');
|
||||
const result = handleError(mcpError);
|
||||
|
||||
expect(result).toBe(mcpError);
|
||||
});
|
||||
|
||||
it('should handle HTTP 401 errors', () => {
|
||||
const httpError = {
|
||||
response: { status: 401, data: { message: 'Unauthorized' } },
|
||||
};
|
||||
|
||||
const result = handleError(httpError);
|
||||
|
||||
expect(result).toBeInstanceOf(AuthenticationError);
|
||||
expect(result.message).toBe('Unauthorized');
|
||||
});
|
||||
|
||||
it('should handle HTTP 404 errors', () => {
|
||||
const httpError = {
|
||||
response: { status: 404, data: { message: 'Not found' } },
|
||||
};
|
||||
|
||||
const result = handleError(httpError);
|
||||
|
||||
expect(result.code).toBe('NOT_FOUND');
|
||||
expect(result.statusCode).toBe(404);
|
||||
});
|
||||
|
||||
it('should handle HTTP 5xx errors', () => {
|
||||
const httpError = {
|
||||
response: { status: 503, data: { message: 'Service unavailable' } },
|
||||
};
|
||||
|
||||
const result = handleError(httpError);
|
||||
|
||||
expect(result).toBeInstanceOf(N8NConnectionError);
|
||||
});
|
||||
|
||||
it('should handle connection refused errors', () => {
|
||||
const connError = { code: 'ECONNREFUSED' };
|
||||
|
||||
const result = handleError(connError);
|
||||
|
||||
expect(result).toBeInstanceOf(N8NConnectionError);
|
||||
expect(result.message).toBe('Cannot connect to n8n API');
|
||||
});
|
||||
|
||||
it('should handle generic errors', () => {
|
||||
const error = new Error('Something went wrong');
|
||||
|
||||
const result = handleError(error);
|
||||
|
||||
expect(result.message).toBe('Something went wrong');
|
||||
expect(result.code).toBe('UNKNOWN_ERROR');
|
||||
expect(result.statusCode).toBe(500);
|
||||
});
|
||||
|
||||
it('should handle errors without message', () => {
|
||||
const error = {};
|
||||
|
||||
const result = handleError(error);
|
||||
|
||||
expect(result.message).toBe('An unexpected error occurred');
|
||||
});
|
||||
});
|
||||
|
||||
describe('withErrorHandling', () => {
|
||||
it('should execute operation successfully', async () => {
|
||||
const operation = jest.fn().mockResolvedValue('success');
|
||||
|
||||
const result = await withErrorHandling(operation, 'test operation');
|
||||
|
||||
expect(result).toBe('success');
|
||||
expect(logger.error).not.toHaveBeenCalled();
|
||||
});
|
||||
|
||||
it('should handle and log errors', async () => {
|
||||
const error = new Error('Operation failed');
|
||||
const operation = jest.fn().mockRejectedValue(error);
|
||||
|
||||
await expect(withErrorHandling(operation, 'test operation')).rejects.toThrow();
|
||||
|
||||
expect(logger.error).toHaveBeenCalledWith('Error in test operation:', error);
|
||||
});
|
||||
|
||||
it('should transform errors using handleError', async () => {
|
||||
const error = { code: 'ECONNREFUSED' };
|
||||
const operation = jest.fn().mockRejectedValue(error);
|
||||
|
||||
try {
|
||||
await withErrorHandling(operation, 'test operation');
|
||||
} catch (err) {
|
||||
expect(err).toBeInstanceOf(N8NConnectionError);
|
||||
}
|
||||
});
|
||||
});
|
||||
119
tests/logger.test.ts
Normal file
119
tests/logger.test.ts
Normal file
@@ -0,0 +1,119 @@
|
||||
import { Logger, LogLevel } from '../src/utils/logger';
|
||||
|
||||
describe('Logger', () => {
|
||||
let logger: Logger;
|
||||
let consoleErrorSpy: jest.SpyInstance;
|
||||
let consoleWarnSpy: jest.SpyInstance;
|
||||
let consoleLogSpy: jest.SpyInstance;
|
||||
|
||||
beforeEach(() => {
|
||||
logger = new Logger({ timestamp: false, prefix: 'test' });
|
||||
consoleErrorSpy = jest.spyOn(console, 'error').mockImplementation();
|
||||
consoleWarnSpy = jest.spyOn(console, 'warn').mockImplementation();
|
||||
consoleLogSpy = jest.spyOn(console, 'log').mockImplementation();
|
||||
});
|
||||
|
||||
afterEach(() => {
|
||||
jest.restoreAllMocks();
|
||||
});
|
||||
|
||||
describe('log levels', () => {
|
||||
it('should only log errors when level is ERROR', () => {
|
||||
logger.setLevel(LogLevel.ERROR);
|
||||
|
||||
logger.error('error message');
|
||||
logger.warn('warn message');
|
||||
logger.info('info message');
|
||||
logger.debug('debug message');
|
||||
|
||||
expect(consoleErrorSpy).toHaveBeenCalledTimes(1);
|
||||
expect(consoleWarnSpy).toHaveBeenCalledTimes(0);
|
||||
expect(consoleLogSpy).toHaveBeenCalledTimes(0);
|
||||
});
|
||||
|
||||
it('should log errors and warnings when level is WARN', () => {
|
||||
logger.setLevel(LogLevel.WARN);
|
||||
|
||||
logger.error('error message');
|
||||
logger.warn('warn message');
|
||||
logger.info('info message');
|
||||
logger.debug('debug message');
|
||||
|
||||
expect(consoleErrorSpy).toHaveBeenCalledTimes(1);
|
||||
expect(consoleWarnSpy).toHaveBeenCalledTimes(1);
|
||||
expect(consoleLogSpy).toHaveBeenCalledTimes(0);
|
||||
});
|
||||
|
||||
it('should log all except debug when level is INFO', () => {
|
||||
logger.setLevel(LogLevel.INFO);
|
||||
|
||||
logger.error('error message');
|
||||
logger.warn('warn message');
|
||||
logger.info('info message');
|
||||
logger.debug('debug message');
|
||||
|
||||
expect(consoleErrorSpy).toHaveBeenCalledTimes(1);
|
||||
expect(consoleWarnSpy).toHaveBeenCalledTimes(1);
|
||||
expect(consoleLogSpy).toHaveBeenCalledTimes(1);
|
||||
});
|
||||
|
||||
it('should log everything when level is DEBUG', () => {
|
||||
logger.setLevel(LogLevel.DEBUG);
|
||||
|
||||
logger.error('error message');
|
||||
logger.warn('warn message');
|
||||
logger.info('info message');
|
||||
logger.debug('debug message');
|
||||
|
||||
expect(consoleErrorSpy).toHaveBeenCalledTimes(1);
|
||||
expect(consoleWarnSpy).toHaveBeenCalledTimes(1);
|
||||
expect(consoleLogSpy).toHaveBeenCalledTimes(2); // info + debug
|
||||
});
|
||||
});
|
||||
|
||||
describe('message formatting', () => {
|
||||
it('should include prefix in messages', () => {
|
||||
logger.info('test message');
|
||||
|
||||
expect(consoleLogSpy).toHaveBeenCalledWith('[test] [INFO] test message');
|
||||
});
|
||||
|
||||
it('should include timestamp when enabled', () => {
|
||||
const timestampLogger = new Logger({ timestamp: true, prefix: 'test' });
|
||||
const dateSpy = jest.spyOn(Date.prototype, 'toISOString').mockReturnValue('2024-01-01T00:00:00.000Z');
|
||||
|
||||
timestampLogger.info('test message');
|
||||
|
||||
expect(consoleLogSpy).toHaveBeenCalledWith('[2024-01-01T00:00:00.000Z] [test] [INFO] test message');
|
||||
|
||||
dateSpy.mockRestore();
|
||||
});
|
||||
|
||||
it('should pass additional arguments', () => {
|
||||
const obj = { foo: 'bar' };
|
||||
logger.info('test message', obj, 123);
|
||||
|
||||
expect(consoleLogSpy).toHaveBeenCalledWith('[test] [INFO] test message', obj, 123);
|
||||
});
|
||||
});
|
||||
|
||||
describe('parseLogLevel', () => {
|
||||
it('should parse log level strings correctly', () => {
|
||||
expect(Logger.parseLogLevel('error')).toBe(LogLevel.ERROR);
|
||||
expect(Logger.parseLogLevel('ERROR')).toBe(LogLevel.ERROR);
|
||||
expect(Logger.parseLogLevel('warn')).toBe(LogLevel.WARN);
|
||||
expect(Logger.parseLogLevel('info')).toBe(LogLevel.INFO);
|
||||
expect(Logger.parseLogLevel('debug')).toBe(LogLevel.DEBUG);
|
||||
expect(Logger.parseLogLevel('unknown')).toBe(LogLevel.INFO);
|
||||
});
|
||||
});
|
||||
|
||||
describe('singleton instance', () => {
|
||||
it('should return the same instance', () => {
|
||||
const instance1 = Logger.getInstance();
|
||||
const instance2 = Logger.getInstance();
|
||||
|
||||
expect(instance1).toBe(instance2);
|
||||
});
|
||||
});
|
||||
});
|
||||
32
tsconfig.json
Normal file
32
tsconfig.json
Normal file
@@ -0,0 +1,32 @@
|
||||
{
|
||||
"compilerOptions": {
|
||||
"target": "ES2020",
|
||||
"module": "commonjs",
|
||||
"lib": ["ES2020"],
|
||||
"outDir": "./dist",
|
||||
"rootDir": "./src",
|
||||
"strict": true,
|
||||
"esModuleInterop": true,
|
||||
"skipLibCheck": true,
|
||||
"forceConsistentCasingInFileNames": true,
|
||||
"resolveJsonModule": true,
|
||||
"declaration": true,
|
||||
"declarationMap": true,
|
||||
"sourceMap": true,
|
||||
"removeComments": true,
|
||||
"noImplicitAny": true,
|
||||
"strictNullChecks": true,
|
||||
"strictFunctionTypes": true,
|
||||
"strictBindCallApply": true,
|
||||
"strictPropertyInitialization": true,
|
||||
"noImplicitThis": true,
|
||||
"alwaysStrict": true,
|
||||
"noUnusedLocals": false,
|
||||
"noUnusedParameters": false,
|
||||
"noImplicitReturns": true,
|
||||
"noFallthroughCasesInSwitch": true,
|
||||
"moduleResolution": "node"
|
||||
},
|
||||
"include": ["src/**/*"],
|
||||
"exclude": ["node_modules", "dist", "**/*.test.ts"]
|
||||
}
|
||||
Reference in New Issue
Block a user