> ## Documentation Index
> Fetch the complete documentation index at: https://docs.corsair.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Webhooks

> Google calendar incoming webhooks: event paths, payloads, and response data.

The Google calendar plugin handles incoming webhooks. Point your provider’s subscription URL at your Corsair HTTP handler (see [Overview](/plugins/googlecalendar/overview) for setup context and the exact URL shape).

<Info>
  **New to Corsair?** See [webhooks](/concepts/webhooks) and [hooks](/concepts/hooks).
</Info>

## Webhook map

* `onEventChanged` (`onEventChanged`)

## HTTP handler setup

```ts app/api/webhook/route.ts theme={null}
import { processWebhook } from "corsair";
import { corsair } from "@/server/corsair";

export async function POST(request: Request) {
    const headers = Object.fromEntries(request.headers);
    const body = await request.json();
    const result = await processWebhook(corsair, headers, body);
    return result.response;
}
```

## Events

## On Event Changed

### On Event Changed

`onEventChanged`

A Google Calendar event was created, updated, or deleted

**Payload**

| Name           | Type     | Required | Description |
| -------------- | -------- | -------- | ----------- |
| `message`      | `object` | No       | —           |
| `subscription` | `string` | No       | —           |
| `event`        | `any`    | No       | —           |

<AccordionGroup>
  <Accordion title="message full type">
    ```ts theme={null}
    {
      data?: string,
      attributes?: {
      },
      messageId?: string,
      publishTime?: string
    }
    ```
  </Accordion>
</AccordionGroup>

<AccordionGroup>
  <Accordion title="Response data full type">
    ```ts theme={null}
    {
      type: eventCreated,
      calendarId: string,
      event: custom,
      timestamp: string
    } | {
      type: eventUpdated,
      calendarId: string,
      event: custom,
      timestamp: string
    } | {
      type: eventDeleted,
      calendarId: string,
      eventId: string,
      timestamp: string
    }
    ```
  </Accordion>
</AccordionGroup>

**`webhookHooks` example**

```ts theme={null}
googlecalendar({
    webhookHooks: {
        onEventChanged: {
            before(ctx, args) {
                return { ctx, args };
            },
            after(ctx, response) {
            },
        },
    },
})
```

***