Send form submissions to n8n.

splitforms delivers every submission on your form to n8n the moment it arrives. On the n8n side you build the workflow once — Webhook trigger node as the trigger, any apps you like after it — and splitforms keeps it fed.

The connection is a signed outbound webhook, not an OAuth app: there is nothing to install and no credentials to rotate.n8n hands you a catch URL (https://your-instance.app.n8n.cloud/webhook/abcd-1234), you paste it into splitforms, and every submission is POSTed there as JSON.

• A splitforms form. Your form's access_key identifies it in the HTML that posts to https://splitforms.com/api/submit— that's what connects a page on your site to the webhook. New accounts get a form and key automatically; find it under Dashboard → Forms.
• A paid splitforms plan. Forms and the dashboard are free for 200 submissions total; webhooks unlock on paid plans.
• The n8n catch URL.Created in the first setup step below — don't go looking for it in n8n's settings, it only exists once you add the trigger.

n8n gets the full submission as JSON — the same body documented in Webhooks:

{
  "event": "submission.created",
  "submission": {
    "id": "3f9a2b7e-4c1d-4e9a-9b2f-7a6c1d3e4f5a",
    "form_name": "Contact",
    "data": {
      "name": "Ada Lovelace",
      "email": "[email protected]",
      "message": "Hello."
    },
    "ip_address": "203.0.113.7",
    "referer": "https://yoursite.com/contact",
    "created_at": "2026-05-04T14:31:04.123Z"
  }
}

Your form's fields live under submission.data with the exact name attributes from your HTML. Alongside the body, splitforms sends these headers:

Delivery times out after 8 seconds and is not auto-retried — the dashboard shows the last status and error per webhook. Want to inspect a payload by hand? Paste it into the webhook tester.

• n8n returns 404 for the webhook. The workflow isn't activated, or you saved the Test URL in splitforms. The Production URL only responds while the workflow is active — switch the URL and toggle the workflow on.
• splitforms can't reach your n8n instance at all. Self-hosted n8n must be on a public HTTPS address. splitforms delivers only to public hosts (private IPs and loopback are refused), so put the instance behind a proper domain with TLS.
• It worked while testing in the editor, but real submissions do nothing. Editor listening uses the Test URL and stops after one call. Save the Production URL in splitforms and activate the workflow.
• You want to verify requests are really from splitforms. Each webhook has a signing secret in the splitforms dashboard. Verify the X-Splitforms-Signature header (HMAC-SHA256 of the raw body) in a Code node before processing.

• Send form submissions to Zapier — Webhooks by Zapier → Catch Hook.
• Send form submissions to Make — Webhooks → Custom webhook.
• Browse all integrations — native and webhook destinations.