import { ChildDocs } from "docs-ui"

export const metadata = {
  title: `Notification Module Providers`,
}

# {metadata.title}

A Notification Module exposes the functionalities to send a notification to a customer or user. For example, sending an order confirmation email.

You can resolve the Notification Module and send notifications in API routes, subscribers, or other resources.

---

## What is a Notification Module Provider?

A notification module provider implements the logic of sending the notification. It either integrates a third-party service or uses custom logic to send the notification.

By default, Medusa uses the Local Notification Module which only simulates sending the notification by logging a message in the terminal.

Medusa provides other Notification Modules that actually send notifications, such as the SendGrid Notification Module Provider.

<ChildDocs type="item" hideItems={["Guides"]} onlyTopLevel={true} />

---

## Notification Module Provider Channels

When you send a notification, you specify the channel to send it through, such as `email` or `sms`. Each provider defined in the Notification Module's `providers` option has a `channels` option specifying which channels it can be used in. Only one provider can be setup for each channel.

For example:

```js title="medusa-config.js" highlights={[["19"]]}
import { Modules } from "@medusajs/utils"

// ...

module.exports = {
  // ...
  modules: {
    // ...
    [Modules.NOTIFICATION]: {
      resolve: "@medusajs/notification",
      options: {
        providers: [
          // ...
          {
            resolve: "@medusajs/notification-local",
            id: "notification",
            options: {
              channels: ["email"],
            },
          },
        ],
      },
    },
  },
}
```

The `channels` option is an array of strings indicating the channels this provider is used for.

---

## Create a Notification Module Provider

To create a notification module provider, refer to [this guide](/references/notification-provider-module).