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Generate workflows from natural language using GPT-4o Mini and n8nBuilder API

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Created by: Mehmet Burak Akgün || n8nbuilderdev

Mehmet Burak Akgün

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Last update 5 days ago

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🤖 AI-Powered n8n Workflow Generator with n8nBuilder API

Overview

This workflow lets you generate complete n8n workflows from natural language descriptions using the n8nBuilder API. 🚀

Users submit a short description via a form, and the workflow returns a ready-to-import n8n workflow JSON.

Why use it?

  • ⚡ AI-generated workflows from natural language
  • 🛠️ Production-ready patterns (triggers, error handling, best practices)
  • 🎯 Perfect for beginners who don't know which nodes to pick
  • 🔄 Two modes: Form-based and AI Chat Agent

Prerequisites

  • 🔑 n8nBuilder account + API token — Get your free token at n8nbuilder.dev
  • 🏢 An n8n instance (Cloud or self-hosted)
  • 🤖 OpenAI API Key (Optional - to use with AI Agents)

⚠️ Important: Never expose your API key in public workflows. Use n8n Credentials for production setups.

Setup Instructions

1. Get your n8nBuilder API token

  • Visit n8nbuilder.dev
  • Sign up or log in to your account
  • Navigate to Account → API to generate your token

2. Configure the Form

The Form Trigger collects:

  • api_token (required) — Your n8nBuilder API token
  • email (required) — Your email address
  • query (required) — Natural language description of the workflow (e.g., "Read RSS from https://n8nbuilder.dev/blog/feed.xml every hour and send Slack message if new post arrives")

3. Workflow Execution

  1. User fills the form and submits
  2. Workflow sends a POST request to https://api.n8nbuilder.dev/api/generate
  3. n8nBuilder API processes the request and generates a complete workflow
  4. Response is cleaned and formatted
  5. User receives the generated workflow JSON ready to import

4. Outputs

The workflow returns:

  • output — Complete n8n workflow JSON ready to import

💡 Tip: Copy the generated JSON and import it directly into your n8n instance via Settings → Workflows → Import from File.

Customization Tips

  • 📝 Write clear descriptions: The more specific your query, the better the generated workflow
  • 🎨 Try different use cases: Data transformation, API integrations, scheduled tasks, webhooks, etc.
  • 🔧 Edit after generation: Generated workflows are production-ready but you can always customize them further
  • 🤖 Use AI Chat mode: Enable the AI Agent for conversational workflow generation

Alternative: Use the n8nBuilder Community Node

🎁 Optional: Install the n8n-nodes-n8nbuilder community node if you prefer using a dedicated node instead of raw HTTP.

See: GitHub Repository

Troubleshooting

  • 401/403 Unauthorized → Check your API token in the form
  • Invalid JSON → Ensure your email and query are properly filled
  • No output returned → Verify your API token is valid and active
  • Slow response → Complex workflows may take a few seconds to generate

Security Best Practices

  • 🔒 Do not hardcode API tokens in public workflows
  • 🔐 Use n8n Credentials for storing tokens securely
  • 🛡️ Keep your API token private and regenerate if compromised

Learn More