Initial commit: n8n MCP server for VS Code integration

- Implemented MCP server with 8 n8n tools
- Added n8n API client for workflow operations
- Configured VS Code settings with API authentication
- Added comprehensive documentation and setup guides
- Tested and verified connection to n8n instance

SETUP.md

@@ -0,0 +1,114 @@
+# Quick Setup Guide
+
+## Step 1: Get Your n8n API Key
+
+1. Open your n8n instance at `http://srvdocker02:8098`
+2. Go to **Settings** → **API**
+3. Click **Create API Key**
+4. Copy the generated API key
+
+## Step 2: Configure the API Key
+
+### Option A: Create .env file (Recommended for local testing)
+
+Create a `.env` file in this directory:
+
+```bash
+N8N_BASE_URL=http://srvdocker02:8098
+N8N_API_KEY=your-api-key-here
+```
+
+### Option B: Update VS Code Settings
+
+Edit `.vscode/settings.json` and add your API key:
+
+```json
+{
+  "mcpServers": {
+    "n8n": {
+      "command": "node",
+      "args": [
+        "/home/rwiegand/Nextcloud/entwicklung/Werkzeuge/n8n_vscode_integration/dist/index.js"
+      ],
+      "env": {
+        "N8N_BASE_URL": "http://srvdocker02:8098",
+        "N8N_API_KEY": "your-api-key-here"
+      }
+    }
+  }
+}
+```
+
+### Option C: Global VS Code Settings
+
+For use across all workspaces, add to your User Settings JSON:
+
+1. Press `Cmd/Ctrl + Shift + P`
+2. Type "Preferences: Open User Settings (JSON)"
+3. Add:
+
+```json
+{
+  "github.copilot.chat.mcp.servers": {
+    "n8n": {
+      "command": "node",
+      "args": [
+        "/home/rwiegand/Nextcloud/entwicklung/Werkzeuge/n8n_vscode_integration/dist/index.js"
+      ],
+      "env": {
+        "N8N_BASE_URL": "http://srvdocker02:8098",
+        "N8N_API_KEY": "your-api-key-here"
+      }
+    }
+  }
+}
+```
+
+## Step 3: Test the Connection
+
+Run the test script:
+
+```bash
+N8N_API_KEY=your-api-key-here node test-connection.js
+```
+
+You should see:
+```
+✓ Successfully connected to n8n!
+✓ Found X workflow(s)
+```
+
+## Step 4: Restart VS Code
+
+After updating the configuration, restart VS Code to load the MCP server.
+
+## Step 5: Use in Copilot Chat
+
+Open Copilot Chat and try:
+
+```
+@workspace List all my n8n workflows
+```
+
+## Troubleshooting
+
+### "401 Unauthorized" Error
+- Your API key is missing or incorrect
+- Make sure you've added `N8N_API_KEY` to the environment variables
+- Generate a new API key in n8n if needed
+
+### "Connection Refused" Error
+- Verify n8n is running: `curl http://srvdocker02:8098/healthz`
+- Check if the URL is correct
+- Verify network connectivity to the server
+
+### MCP Server Not Found in Copilot
+- Make sure you've run `npm run build`
+- Verify the path in settings.json is correct
+- Restart VS Code
+- Check VS Code Output panel for errors (View → Output → GitHub Copilot Chat)
+
+### Changes Not Taking Effect
+- Run `npm run build` after code changes
+- Restart VS Code to reload the MCP server
+- Check that your settings.json is valid JSON