supabase/apps/docs/content/guides/database/webhooks.mdx

---
id: 'webhooks'
title: 'Database Webhooks'
description: 'Trigger external payloads on database events.'
subtitle: 'Trigger external payloads on database events.'
tocVideo: 'codAs9-NeHM'
---

Database Webhooks allow you to send real-time data from your database to another system whenever a table event occurs.

You can hook into three table events: `INSERT`, `UPDATE`, and `DELETE`. All events are fired _after_ a database row is changed.

## Webhooks vs triggers

Database Webhooks are very similar to triggers, and that's because Database Webhooks are a convenience wrapper around triggers using the [pg_net](/docs/guides/database/extensions/pg_net) extension. This extension is asynchronous, and therefore will not block your database changes for long-running network requests.

This video demonstrates how you can create a new customer in Stripe each time a row is inserted into a `profiles` table:

<YouTube id="codAs9-NeHM" title="Sending Database Webhooks on table changes" />

## Creating a webhook

1. Create a new [Database Webhook](/dashboard/project/_/integrations/webhooks/overview) in the Dashboard.
1. Give your Webhook a name.
1. Select the table you want to hook into.
1. Select one or more events (table inserts, updates, or deletes) you want to hook into.

Since webhooks are database triggers, you can also create one from SQL statement directly.

```sql
create trigger "my_webhook" after insert
on "public"."my_table" for each row
execute function "supabase_functions"."http_request"(
  'http://host.docker.internal:3000',
  'POST',
  '{"Content-Type":"application/json"}',
  '{}',
  '1000'
);
```

We currently support HTTP webhooks. These can be sent as `POST` or `GET` requests with a JSON payload.

## Payload

The payload is automatically generated from the underlying table record:

```typescript
type InsertPayload = {
  type: 'INSERT'
  table: string
  schema: string
  record: TableRecord<T>
  old_record: null
}
type UpdatePayload = {
  type: 'UPDATE'
  table: string
  schema: string
  record: TableRecord<T>
  old_record: TableRecord<T>
}
type DeletePayload = {
  type: 'DELETE'
  table: string
  schema: string
  record: null
  old_record: TableRecord<T>
}
```

## Monitoring

Logging history of webhook calls is available under the `net` schema of your database. For more info, see the [GitHub Repo](https://github.com/supabase/pg_net).

## Local development

When using Database Webhooks on your local Supabase instance, you need to be aware that the Postgres database runs inside a Docker container. This means that `localhost` or `127.0.0.1` in your webhook URL will refer to the container itself, not your host machine where your application is running.

To target services running on your host machine, use `host.docker.internal`. If that doesn't work, you may need to use your machine's local IP address instead.

For example, if you want to trigger an edge function when a webhook fires, your webhook URL would be:

```
http://host.docker.internal:54321/functions/v1/my-function-name
```

If you're experiencing connection issues with webhooks locally, verify you're using the correct hostname instead of `localhost`.

## Resources

- [pg_net](/docs/guides/database/extensions/pg_net): an async networking extension for Postgres