---
title: "webhookEvent Trigger"
sidebarTitle: "webhookEvent"
description: "Trigger a workflow when a webhook event is received"
---

## Usage

```ts
import { webhookEvent, Trigger } from "@trigger.dev/sdk";

new Trigger({
  id: "caldotcom-to-slack",
  name: "Cal.com To Slack",
  on: webhookEvent({
    service: "cal.com",
    eventName: "BOOKING_CREATED",
    filter: {
      triggerEvent: ["BOOKING_CREATED"],
    },
    schema: z.any(),
    verifyPayload: {
      enabled: true,
      header: "X-Cal-Signature-256",
    },
  }),
  run: async (event, ctx) => {},
}).listen();
```

## Options

<ParamField path="service" type="string" required={true}>
  The name of the service that will be sending the webhook event.
</ParamField>

<ParamField path="name" type="string" required={true}>
  The name of the event that will be sent by the service.
</ParamField>

<ParamField path="filter" type="object" required={false}>
  An event filter to apply to the webhook event. See the [event filter
  documentation](/guides/event-filters) for more information.
</ParamField>

<ParamField path="schema" type="Zod Schema" required={true}>
  A Zod schema to validate the webhook event payload against. See our [Zod
  guide](/guides/zod) for more information.
</ParamField>

<ParamField path="verifyPayload" type="object" required={false}>
  Verify the payload of the webhook event. Currently only supports sha256 HMAC
  signatures.
  <Expandable title="properties">
    <ParamField path="enabled" type="boolean" required={false}>
      Whether to verify the payload of the webhook event. Defaults to `false`.
    </ParamField>

    <ParamField path="header" type="string" required={false}>
      The name of the header that contains the signature to verify the payload
      against. e.g. `X-Webhook-Signature`.
    </ParamField>

  </Expandable>
</ParamField>