Every automation eventually needs ten lines of JavaScript. That’s where the whole thing falls apart.

I kept hitting the same wall building automations in Make, n8n, and Zapier: the second a workflow needed real logic — not just drag-and-drop steps — I was stuck. Rebuilding half of it in a self-hosted Node server just to write ten lines of code.

CustomJS is the toolkit for that gap. A code-first API that plugs into whatever you’re already using.

No more exporting data, converting it by hand, and stitching six tools together.

What you get:

→ Run JS/Node functions with full NPM support, no server to manage

→ HTML to PDF, merge documents, capture screenshots on demand

→ Host static pages and drag-and-drop forms with a headless backend

→ Inbound email hooks that trigger your workflow

→ Built-in MCP server so AI agents can call CustomJS directly

More than 4,000 workspaces on Make, n8n, and Power Automate have been running this in production since 2023.

What’s the one step in your automations that still quietly needs a “real developer” to fix? Drop it in the comments — I’m here all launch.