How I Built an AI-Native Alternative to Zapier Using Node.js

Automation is expensive. Platforms like Zapier charge per task, which means as your business scales, your costs scale exponentially.

I wanted to solve this, so I built Zappnod: an engine that uses AI to write automation code for you.

In this post, I want to break down exactly how I built the architecture:

1. The Prompt Layer: How I structured the inputs so the LLM understands API documentation.
2. The Validation Agent: How I prevent the AI from hallucinating broken code.
3. The Output: Generating clean, deployable Node.js scripts.

If you want to see the engine in action, check out the live version at https://zappnod.app. Let me know what you think of the tech stack in the comments!