# Mautic Webhooks

## When to Use This Skill

* How do I receive Mautic webhooks?
* How do I verify the Mautic `Webhook-Signature` header?
* Why does my Mautic webhook signature verification fail?
* How do I handle `mautic.lead_post_save_new` or `mautic.form_on_submit` events?
* How do I process batched events from Mautic's queue mode?

## Verification (core)

Mautic computes a **base64** HMAC-SHA256 of the **raw request body**, keyed with the webhook's secret as a raw string (not decoded, no prefix), and sends it in the `Webhook-Signature` header. Despite the header name this is **not** Standard Webhooks: there is no `webhook-id` or `webhook-timestamp`, and nothing but the body is signed.

Node:

```javascript
const crypto = require('crypto');

function verify(rawBody, signatureHeader, secret) {
  if (!signatureHeader) return false;
  const expected = crypto.createHmac('sha256', secret).update(rawBody).digest('base64');
  try {
    return crypto.timingSafeEqual(Buffer.from(signatureHeader), Buffer.from(expected));
  } catch {
    return false; // different lengths
  }
}

```

Python:

```python
import base64, hashlib, hmac

def verify(raw_body: bytes, signature_header: str, secret: str) -> bool:
    if not signature_header:
        return False
    expected = base64.b64encode(
        hmac.new(secret.encode(), raw_body, hashlib.sha256).digest()
    ).decode()
    return hmac.compare_digest(signature_header.encode(), expected.encode())

```

> **Raw body**: read the body as bytes before any JSON parsing, and accept any content type (Express: `express.raw({ type: '*/*' })`).
> 
> **For complete handlers with route wiring, event dispatch, and tests**, see:
> 
> * [examples/express/](https://github.com/hookdeck/webhook-skills/tree/main/skills/mautic-webhooks/examples/express/)
> * [examples/nextjs/](https://github.com/hookdeck/webhook-skills/tree/main/skills/mautic-webhooks/examples/nextjs/)
> * [examples/fastapi/](https://github.com/hookdeck/webhook-skills/tree/main/skills/mautic-webhooks/examples/fastapi/)

## Payload Shape

The body is an object **keyed by event type**; each value is an array of events, each with a `timestamp`. In queue (background) mode one request can contain several event types and several events per type, so iterate over all keys and all items.

```json
{
  "mautic.lead_post_save_new": [
    { "contact": { "id": 1 }, "timestamp": "2026-01-01T12:00:00+00:00" }
  ]
}

```

## Common Event Types

| Event type | Description |
| --- | --- |
| `mautic.lead_post_save_new` | Contact identified (created) |
| `mautic.lead_post_save_update` | Contact updated |
| `mautic.lead_post_delete` | Contact deleted |
| `mautic.lead_points_change` | Contact points changed |
| `mautic.lead_channel_subscription_changed` | Contact channel subscription status changed |
| `mautic.lead_company_change` | Contact added to or removed from a company |
| `mautic.company_post_save` | Company created or updated |
| `mautic.company_post_delete` | Company deleted |
| `mautic.email_on_send` | Email sent to a contact |
| `mautic.email_on_open` | Email presumably opened |
| `mautic.form_on_submit` | Form submitted |
| `mautic.page_on_hit` | Landing page or tracked page visited |
| `mautic.sms_on_send` | Text message sent to a contact |
| `mautic.lead_list_change` | Contact added to or removed from a segment (in Mautic's sender, not its docs) |

> **For payload fields**, see [Mautic webhook events and payloads](https://devdocs.mautic.org/en/5.x/webhooks/events/index.html).

## Environment Variables

```bash
MAUTIC_WEBHOOK_SECRET=your_webhook_secret   # Secret shown on the webhook's edit page in Mautic

```

## Local Development

```bash
# Start tunnel (no account needed)
npx hookdeck-cli listen 3000 mautic --path /webhooks/mautic

```

## Reference Materials

* [references/overview.md](https://github.com/hookdeck/webhook-skills/blob/main/skills/mautic-webhooks/references/overview.md) - Mautic webhook concepts, events, payload structure
* [references/setup.md](https://github.com/hookdeck/webhook-skills/blob/main/skills/mautic-webhooks/references/setup.md) - Create and test a webhook in Mautic
* [references/verification.md](https://github.com/hookdeck/webhook-skills/blob/main/skills/mautic-webhooks/references/verification.md) - Signature verification details and gotchas