# 1. Subscription: Get Events

Follow Subscriptions when `INSERT`/`MODIFY`/`REMOVE` actions happen with "Farm", "Field", "FieldSatelliteImage", "RasterAnalysisMap", "VectorAnalysisMap", other entities.

The Subscription mechanism is built on top of MQTT and WebSocket. Our recommendation is to start integration by reading the [AWS AppSync Subscription article](https://docs.aws.amazon.com/appsync/latest/devguide/real-time-websocket-client.html). 

{% hint style="info" %}
Subscription events are sent as soon as the event happened in the GeoPard backend.
{% endhint %}

{% hint style="info" %}
Every subscription event has a unique identification named `uuid`, which is useful to filter processed and missed events requested from [82. Query: Restore Subscription Events](/geopard-tutorials/api-docs/geopard-api-requests-overview/82.-query-restore-subscription-events.md).
{% endhint %}

{% code lineNumbers="true" %}

```graphql
subscription FollowPlatformEvent {
  followPlatformEvent(userUuid: "<placeholder_of_user_uuid>") {
    uuid
    userUuid
    action
    nodePath {
      entity
      uuid
    }
  }
}
```

{% endcode %}


---

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