Send Form Submissions to a Webhook

The problem with wiring forms to webhooks yourself

A raw HTML form cannot call a webhook on its own. You end up writing an endpoint to receive the POST, validate it, filter spam, retry failed deliveries, and keep the URL out of your client-side code. That is a lot of infrastructure for a contact form or a signup box.

VASTROX Forms is the receiving endpoint. You point your form at a VASTROX URL, and it handles storage, spam filtering, and forwarding to your webhook. Nothing runs on your side except the static HTML.

Point your form at VASTROX in one line

Set the form action to your VASTROX endpoint and use method POST. Every named input is captured and forwarded. There is no JavaScript to include and no API key to embed in the page.

Replace YOUR-ID with the ID from your VASTROX Forms dashboard.

Copy<form action="https://forms.vastrox.com/YOUR-ID" method="POST">
  <input type="text" name="name" required>
  <input type="email" name="email" required>
  <textarea name="message"></textarea>
  <button type="submit">Send</button>
</form>

Add a webhook to Zapier, Make, Slack, Discord, or your API

In your form settings, paste one or more webhook URLs. On each submission VASTROX sends a JSON payload to those URLs, so the same form can trigger a Zap, a Make scenario, a Slack or Discord channel message, and your own backend at the same time.

The payload is a flat JSON object of your field names and values, which maps cleanly onto Zapier Catch Hook, Make custom webhooks, and any endpoint you control.

CopyPOST https://your-api.example.com/leads
Content-Type: application/json

{
  "name": "Ada Lovelace",
  "email": "ada@example.com",
  "message": "Interested in a demo",
  "_form": "YOUR-ID",
  "_submitted_at": "2026-07-07T14:03:11Z"
}

Post directly to a webhook from your own code

You do not need an HTML form at all. Any client that can send a POST works, so you can submit from a fetch call, a mobile app, or a server job and let VASTROX fan it out to your webhooks.

Send either form-encoded data or JSON and VASTROX normalizes it before forwarding.

Copyfetch('https://forms.vastrox.com/YOUR-ID', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    name: 'Ada Lovelace',
    email: 'ada@example.com',
    message: 'Interested in a demo'
  })
})

Spam filtering and delivery you can trust

Every submission is stored in your dashboard before it is forwarded, so a webhook that is temporarily down never means a lost lead. Built in spam checks and an optional honeypot field keep junk out of your webhook so your automations only fire on real submissions.

VASTROX Forms is part of the wider VASTROX platform, so if you also run VASTROX hosting or email, your forms, inbox, and site live under one account with no extra setup.

Frequently asked questions