Keywords AI Node for n8n

A custom n8n node for integrating Keywords AI's LLM Gateway and Prompt Management features into your n8n workflows.

Features

• 🚀 Gateway (Standard): Make direct LLM calls with custom messages
• 📝 Gateway with Prompt: Use managed prompts from Keywords AI
• 🔄 Auto-populated Variables: Automatically fetch variable names from your prompts
• 📊 Dynamic Version Selection: Choose from live, draft, or specific prompt versions
• 🔐 Secure Authentication: API key-based authentication
• 🎯 AI-Ready: Works as an AI tool in n8n workflows

Installation

Prerequisites

• Node.js v18 or higher
• npm or yarn
• Keywords AI API Key (Get one here)

Fresh Installation

1. Clone the repository:

   git clone <your-repo-url>
   cd n8n-keywordsai
   

2. Install dependencies:

   npm install
   

3. Build the node:

   npm run build
   

4. Link to n8n:

   # Link the package globally
   npm link
   
   # Create n8n custom directory if it doesn't exist
   mkdir -p ~/.n8n/custom
   cd ~/.n8n/custom
   
   # Initialize if package.json doesn't exist
   npm init -y
   
   # Link the Keywords AI node
   npm link n8n-nodes-keywordsai
   

5. Start n8n:

   npx n8n start
   

6. Access n8n:
   Open http://localhost:5678 in your browser

Usage

Setup Credentials

1. In n8n, go to Settings → Credentials
2. Click + Add Credential
3. Search for "Keywords AI"
4. Enter your API Key
5. Click Test to verify
6. Click Save

Gateway (Standard)

Direct LLM calls without using saved prompts:

1. Add Keywords AI node to your workflow
2. Select "Gateway (Standard)"
3. Configure:
   • Model: gpt-4o-mini (or any supported model)
   • System Message: Your system prompt
   • Messages: Add user/assistant messages
4. Execute the node

Gateway with Prompt

Use your managed prompts from Keywords AI:

1. Add Keywords AI node to your workflow
2. Select "Gateway with Prompt"
3. Configure:
   • Prompt Name or ID: Select from dropdown (auto-populated)
   • Version: Choose version (auto-populated)
   • Variables: Fill in values (names auto-populated from prompt)
4. Execute the node

Observability & Tracking

Track and monitor your LLM calls with built-in observability parameters:

• Metadata: Custom key-value pairs for reference
• Custom Identifier: Fast, indexed tags for log filtering
• Customer Identifier: Track per-user usage and costs
• Customer Params: Detailed user info with budget tracking
• Request Breakdown: Get metrics (tokens, cost, latency) in response

See OBSERVABILITY_GUIDE.md for detailed documentation.

Example Workflow

Manual Trigger → Keywords AI → Send Email

Development

Project Structure

n8n-keywordsai/
├── nodes/
│   └── KeywordsAi/
│       ├── KeywordsAi.node.ts       # Main node logic
│       └── KeywordsAi.node.json     # Node metadata
├── credentials/
│   └── KeywordsAIApi.credentials.ts # Credentials definition
├── icons/
│   ├── keywordsai.svg              # Light theme icon
│   └── keywordsai.dark.svg         # Dark theme icon
├── dist/                            # Compiled output (gitignored)
├── package.json
└── README.md

Build Commands

# Build the node
npm run build

# Lint the code
npm run lint

# Auto-fix linting issues
npm run lint:fix

# Watch mode (development)
npm run watch

Making Changes

1. Make your changes to the TypeScript files
2. Build: npm run build
3. Restart n8n to see changes

Clean Reinstall

If you need to start fresh:

# In the project directory
cd /path/to/n8n-keywordsai

# Remove build artifacts and dependencies
rm -rf dist node_modules package-lock.json

# Clear npm cache
npm cache clean --force

# Reinstall
npm install

# Rebuild
npm run build

# Relink
npm link
cd ~/.n8n/custom
npm link n8n-nodes-keywordsai

# Restart n8n
npx n8n start

API Reference

This node uses the following Keywords AI API endpoints:

• GET /api/prompts/ - List all prompts
• GET /api/prompts/<prompt_id>/versions/ - List prompt versions
• GET /api/prompts/<prompt_id>/versions/<version>/ - Get specific version
• POST /api/chat/completions - Make LLM calls

Troubleshooting

Node not showing in n8n

1. Ensure the node is built: npm run build
2. Check the link: cd ~/.n8n/custom && npm list n8n-nodes-keywordsai
3. Clear n8n cache: rm -rf ~/.n8n/cache
4. Restart n8n

Variables not loading

Make sure you select:

1. A Prompt first
2. Then a Version

Variables load after version selection.

Build errors

# Clean everything and rebuild
rm -rf dist node_modules
npm install
npm run build

npm cache issues

npm cache clean --force
rm -rf ~/.npm/_npx

Documentation

• Keywords AI Documentation
• Keywords AI Platform
• n8n Community Nodes Guide

Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Test thoroughly
5. Submit a pull request

License

[Your License Here]

Support

For issues and questions:

• Keywords AI: support@keywordsai.co
• GitHub Issues: Create an issue

Credits

Built with ❤️ for the n8n and Keywords AI communities.