Your AI 🎨 the form. We collect the responses.
API endpoint to receive form submissions without a UI. Perfect for AI-generated forms or custom integrations. Send JSON data, it will be stored and can trigger email notifications.
How it works for AI-Builders
Three simple steps from AI-generated code to live form submissions.
Generate your UI
Ask Cursor or v0: "Build me a modern contact form with Tailwind CSS."
<form action="/submit" method="POST">
<input name="name" />
<input name="email" />
<textarea name="message"></textarea>
<button>Send</button>
</form>Swap the Action URL
Replace action="/submit" with your unique CustomJS Link.
<form
action="https://api.customjs.io/abc123"
method="POST"
>
<input name="name" />
<input name="email" />
<textarea name="message"></textarea>
<button>Send</button>
</form>You're Live
Submissions go straight to your inbox. No backend coding required.
✅ Form submitted!
From: {{name}}
Email: {{email}}
Message: {{message}}
Received at: 2026-03-13 09:32The Old Way vs The CustomJS Way
Contrast the manual pain with AI speed.
| Feature | The Old Way (Manual) | The CustomJS Way (AI-Speed) |
|---|---|---|
| Field Creation | Create fields in a clunky UI builder | Just send any data—we detect it automatically |
| Server Setup | Set up a server or AWS Lambda | Zero configuration. Zero maintenance. |
| Design Control | Fight with iFrame styling | 100% design freedom. Use your own CSS/Tailwind. |
| API Integration | Manual API integration | Paste & Play. Optimized for AI workflows. |
The No-Brainer Features
Focus on the benefits, not the specs.
Invisible Backend
We stay out of your way. No schemas, no "adding fields" in a dashboard. If you add a "Phone Number" field to your code, we just pick it up.
Smart Email Templates
Use {{name}} or {{message}} in your replies. Our engine maps your code variables to your emails instantly.
Pro-Grade Spam Protection
Built-in honeypots and bot detection so your inbox stays clean while you sleep.
Logic-Powered (Optional)
Want to send data to Slack or a CRM? Attach a simple script and automate your business.
100% Design Freedom
Use your own CSS, Tailwind, or any framework. No theme editors, no limitations. Complete control over your frontend.
AI-Workflow Optimized
Copy your AI-generated frontend code, swap the action URL with your CustomJS endpoint, and you're live.
💡 Pro Tip for Beginners
Using Cursor? Just tell the AI:
"Use my CustomJS endpoint for this form and make sure the field names match my email template."
It's that easy. The AI will handle the rest.
Ready to go live?
Stop wrestling with backend code. Generate your endpoint in seconds and finish that website today.
No credit card required.