HelloForms

Webhooks integration

Send form responses to your own webhook

CW

Paste any https endpoint you control and each submission is POSTed as a signed JSON envelope. Verify the X-HelloForms-Signature header with the secret shown after saving, and do whatever your backend needs.

Build a form freeBrowse templates

What the Custom webhook integration does

  • HMAC signature header so your endpoint can reject anything it did not expect.
  • Retries with exponential backoff, and repeated failures disable the destination instead of hammering it.
  • Every attempt — status, response and duration — is visible in the delivery log.

What it looks like

Signed JSON: form metadata, question labels, answers, submission id and timestamps.

HelloForms — response

Removals enquiry · #4821

Full name
Priya Raman
Email
priya@northgate.co
Service needed
Office move
Budget
£2,000 – £5,000

Custom webhook — request received

POST /hooks/forms · 200 OK · 148 ms

X-HelloForms-Signature: sha256=…

{
  "submission_id": "4821",
  "form": "Removals enquiry",
  "answers": {
    "Full name": "Priya Raman",
    "Email": "priya@northgate.co",
    "Service needed": "Office move"
  }
}
Demo data: a HelloForms response on the left, and how it arrives in Custom webhook on the right.

How to connect Custom webhook to your form

  1. 1

    Paste the https URL that should receive submissions.

  2. 2

    Verify the X-HelloForms-Signature header using the signing secret shown after you save.

Who uses it

  • Developers writing submissions straight into their own database.
  • Products that need a custom enrichment or validation step on receipt.
  • Anything not covered by a ready-made destination.

Works well with

Build a form that feeds Custom webhook today

Every destination is included on every plan — no per-integration add-ons.

Start buildingSee all integrations