Subscriptions: Getting Started

Subscriptions allow GraphQL clients to observe specific events and receive updates from the server when those events occur.

NOTE Much of the credit should be given to the [Ruby implementation](https://github.com/rmosolgo/graphql-ruby/blob/master/guides/subscriptions/overview.md) as they provided a great overview of how the backend should work. :::

Setup

Install the Pusher PHP Library (opens new window) for interacting with the Pusher HTTP API.

composer require pusher/pusher-php-server

Add the service provider to your config/app.php

'providers' => [
    \Nuwave\Lighthouse\Subscriptions\SubscriptionServiceProvider::class,
],